diff --git a/fe/pom.xml b/fe/pom.xml
index 5c82f6fafb..d1731d3e86 100644
--- a/fe/pom.xml
+++ b/fe/pom.xml
@@ -578,6 +578,10 @@ under the License.
                 <artifactId>maven-surefire-plugin</artifactId>
                 <version>2.22.2</version>
                 <configuration>
+                    <!-->set larger, eg, 3, to reduce the time or running FE unit tests<-->
+                    <forkCount>1</forkCount>
+                    <!-->not reuse forked jvm, so that each unit test will run in separate jvm. to avoid singleton confict<-->
+                    <reuseForks>false</reuseForks>
                     <argLine>
                         -javaagent:${settings.localRepository}/org/jmockit/jmockit/1.48/jmockit-1.48.jar
                     </argLine>
diff --git a/fe/src/main/java/org/apache/doris/PaloFe.java b/fe/src/main/java/org/apache/doris/PaloFe.java
index 81217f9c12..81c2fb4b0f 100644
--- a/fe/src/main/java/org/apache/doris/PaloFe.java
+++ b/fe/src/main/java/org/apache/doris/PaloFe.java
@@ -51,25 +51,36 @@ import java.nio.channels.OverlappingFileLockException;
 public class PaloFe {
     private static final Logger LOG = LogManager.getLogger(PaloFe.class);
 
-    // entrance for palo frontend
+    public static final String DORIS_HOME_DIR = System.getenv("DORIS_HOME");
+    public static final String PID_DIR = System.getenv("PID_DIR");
+
     public static void main(String[] args) {
+        start(DORIS_HOME_DIR, PID_DIR, args);
+    }
+
+    // entrance for doris frontend
+    public static void start(String dorisHomeDir, String pidDir, String[] args) {
+        if (Strings.isNullOrEmpty(dorisHomeDir)) {
+            System.err.println("env DORIS_HOME is not set.");
+            return;
+        }
+
+        if (Strings.isNullOrEmpty(pidDir)) {
+            System.err.println("env PID_DIR is not set.");
+            return;
+        }
+
         CommandLineOptions cmdLineOpts = parseArgs(args);
         System.out.println(cmdLineOpts.toString());
 
         try {
-            final String paloHome = System.getenv("DORIS_HOME");
-            if (Strings.isNullOrEmpty(paloHome)) {
-                System.out.println("env DORIS_HOME is not set.");
-                return;
-            }
-
             // pid file
-            if (!createAndLockPidFile(System.getenv("PID_DIR") + "/fe.pid")) {
+            if (!createAndLockPidFile(pidDir + "/fe.pid")) {
                 throw new IOException("pid file is already locked.");
             }
 
             // init config
-            new Config().init(paloHome + "/conf/fe.conf");
+            new Config().init(dorisHomeDir + "/conf/fe.conf");
             Log4jConfig.initLogging();
 
             // set dns cache ttl
@@ -103,11 +114,11 @@ public class PaloFe {
             while (true) {
                 Thread.sleep(2000);
             }
-        } catch (Throwable exception) {
-            exception.printStackTrace();
+        } catch (Throwable e) {
+            e.printStackTrace();
             System.exit(-1);
         }
-    } // end PaloFe main()
+    }
 
     /*
      * -v --version
@@ -228,7 +239,7 @@ public class PaloFe {
             System.out.println("Build hash: " + Version.PALO_BUILD_HASH);
             System.exit(0);
         } else if (cmdLineOpts.runBdbTools()) {
-            BDBTool bdbTool = new BDBTool(Catalog.BDB_DIR, cmdLineOpts.getBdbToolOpts());
+            BDBTool bdbTool = new BDBTool(Catalog.getCurrentCatalog().getBdbDir(), cmdLineOpts.getBdbToolOpts());
             if (bdbTool.run()) {
                 System.exit(0);
             } else {
diff --git a/fe/src/main/java/org/apache/doris/catalog/Catalog.java b/fe/src/main/java/org/apache/doris/catalog/Catalog.java
index b9cf8953b1..288c189923 100644
--- a/fe/src/main/java/org/apache/doris/catalog/Catalog.java
+++ b/fe/src/main/java/org/apache/doris/catalog/Catalog.java
@@ -32,6 +32,7 @@ import org.apache.doris.analysis.AlterDatabaseQuotaStmt;
 import org.apache.doris.analysis.AlterDatabaseRename;
 import org.apache.doris.analysis.AlterSystemStmt;
 import org.apache.doris.analysis.AlterTableStmt;
+import org.apache.doris.analysis.AlterViewStmt;
 import org.apache.doris.analysis.BackupStmt;
 import org.apache.doris.analysis.CancelAlterSystemStmt;
 import org.apache.doris.analysis.CancelAlterTableStmt;
@@ -51,13 +52,11 @@ import org.apache.doris.analysis.DropDbStmt;
 import org.apache.doris.analysis.DropFunctionStmt;
 import org.apache.doris.analysis.DropPartitionClause;
 import org.apache.doris.analysis.DropTableStmt;
-import org.apache.doris.analysis.TruncateTableStmt;
 import org.apache.doris.analysis.FunctionName;
 import org.apache.doris.analysis.HashDistributionDesc;
 import org.apache.doris.analysis.KeysDesc;
 import org.apache.doris.analysis.LinkDbStmt;
 import org.apache.doris.analysis.MigrateDbStmt;
-import org.apache.doris.analysis.AlterViewStmt;
 import org.apache.doris.analysis.ModifyPartitionClause;
 import org.apache.doris.analysis.PartitionDesc;
 import org.apache.doris.analysis.PartitionRenameClause;
@@ -69,9 +68,10 @@ import org.apache.doris.analysis.RestoreStmt;
 import org.apache.doris.analysis.RollupRenameClause;
 import org.apache.doris.analysis.ShowAlterStmt.AlterType;
 import org.apache.doris.analysis.SingleRangePartitionDesc;
-import org.apache.doris.analysis.TableRenameClause;
-import org.apache.doris.analysis.TableRef;
 import org.apache.doris.analysis.TableName;
+import org.apache.doris.analysis.TableRef;
+import org.apache.doris.analysis.TableRenameClause;
+import org.apache.doris.analysis.TruncateTableStmt;
 import org.apache.doris.analysis.UserDesc;
 import org.apache.doris.analysis.UserIdentity;
 import org.apache.doris.backup.BackupHandler;
@@ -157,9 +157,9 @@ import org.apache.doris.persist.DatabaseInfo;
 import org.apache.doris.persist.DropInfo;
 import org.apache.doris.persist.DropLinkDbAndUpdateDbInfo;
 import org.apache.doris.persist.DropPartitionInfo;
-import org.apache.doris.persist.ModifyTablePropertyOperationLog;
 import org.apache.doris.persist.EditLog;
 import org.apache.doris.persist.ModifyPartitionInfo;
+import org.apache.doris.persist.ModifyTablePropertyOperationLog;
 import org.apache.doris.persist.PartitionPersistInfo;
 import org.apache.doris.persist.RecoverInfo;
 import org.apache.doris.persist.ReplicaPersistInfo;
@@ -250,8 +250,12 @@ public class Catalog {
     private static final int HTTP_TIMEOUT_SECOND = 5;
     private static final int STATE_CHANGE_CHECK_INTERVAL_MS = 100;
     private static final int REPLAY_INTERVAL_MS = 1;
-    public static final String BDB_DIR = Config.meta_dir + "/bdb";
-    public static final String IMAGE_DIR = Config.meta_dir + "/image";
+    private static final String BDB_DIR = "/bdb";
+    private static final String IMAGE_DIR = "/image";
+
+    private String metaDir;
+    private String bdbDir;
+    private String imageDir;
 
     private MetaContext metaContext;
     private long epoch = 0;
@@ -312,7 +316,6 @@ public class Catalog {
 
     private CatalogIdGenerator idGenerator = new CatalogIdGenerator(NEXT_ID_INIT_VALUE);
 
-    private String metaDir;
     private EditLog editLog;
     private int clusterId;
     private String token;
@@ -505,6 +508,10 @@ public class Catalog {
 
         this.dynamicPartitionScheduler = new DynamicPartitionScheduler("DynamicPartitionScheduler",
                 Config.dynamic_partition_check_interval_seconds * 1000L);
+        
+        this.metaDir = Config.meta_dir;
+        this.bdbDir = this.metaDir + BDB_DIR;
+        this.imageDir = this.metaDir + IMAGE_DIR;
     }
 
     public static void destroyCheckpoint() {
@@ -635,7 +642,23 @@ public class Catalog {
         }
     }
 
+    public String getBdbDir() {
+        return bdbDir;
+    }
+
+    public String getImageDir() {
+        return imageDir;
+    }
+
     public void initialize(String[] args) throws Exception {
+        // set meta dir first.
+        // we already set these variables in constructor. but Catalog is a singleton class.
+        // so they may be set before Config is initialized.
+        // set them here again to make sure these variables use values in fe.conf.
+        this.metaDir = Config.meta_dir;
+        this.bdbDir = this.metaDir + BDB_DIR;
+        this.imageDir = this.metaDir + IMAGE_DIR;
+
         // 0. get local node and helper node info
         getSelfHostPort();
         getHelperNodes(args);
@@ -648,12 +671,12 @@ public class Catalog {
         }
 
         if (Config.edit_log_type.equalsIgnoreCase("bdb")) {
-            File bdbDir = new File(BDB_DIR);
+            File bdbDir = new File(this.bdbDir);
             if (!bdbDir.exists()) {
                 bdbDir.mkdirs();
             }
 
-            File imageDir = new File(IMAGE_DIR);
+            File imageDir = new File(this.imageDir);
             if (!imageDir.exists()) {
                 imageDir.mkdirs();
             }
@@ -667,7 +690,7 @@ public class Catalog {
 
         // 3. Load image first and replay edits
         this.editLog = new EditLog(nodeName);
-        loadImage(IMAGE_DIR); // load image file
+        loadImage(this.imageDir); // load image file
         editLog.open(); // open bdb env
         this.globalTransactionMgr.setEditLog(editLog);
         this.idGenerator.setEditLog(editLog);
@@ -684,19 +707,15 @@ public class Catalog {
     }
 
     // wait until FE is ready.
-    public void waitForReady() {
+    public void waitForReady() throws InterruptedException {
         while (true) {
             if (isReady()) {
                 LOG.info("catalog is ready. FE type: {}", feType);
                 break;
             }
 
-            try {
-                Thread.sleep(2000);
-                LOG.info("wait catalog to be ready. FE type: {}. is ready: {}", feType, isReady.get());
-            } catch (InterruptedException e) {
-                e.printStackTrace();
-            }
+            Thread.sleep(2000);
+            LOG.info("wait catalog to be ready. FE type: {}. is ready: {}", feType, isReady.get());
         }
     }
     
@@ -705,8 +724,8 @@ public class Catalog {
     }
 
     private void getClusterIdAndRole() throws IOException {
-        File roleFile = new File(IMAGE_DIR, Storage.ROLE_FILE);
-        File versionFile = new File(IMAGE_DIR, Storage.VERSION_FILE);
+        File roleFile = new File(this.imageDir, Storage.ROLE_FILE);
+        File versionFile = new File(this.imageDir, Storage.VERSION_FILE);
 
         // if helper node is point to self, or there is ROLE and VERSION file in local.
         // get the node type from local
@@ -732,7 +751,7 @@ public class Catalog {
             // FOLLOWER, which may cause UNDEFINED behavior.
             // Everything may be OK if the origin role is exactly FOLLOWER,
             // but if not, FE process will exit somehow.
-            Storage storage = new Storage(IMAGE_DIR);
+            Storage storage = new Storage(this.imageDir);
             if (!roleFile.exists()) {
                 // The very first time to start the first node of the cluster.
                 // It should became a Master node (Master node's role is also FOLLOWER, which means electable)
@@ -769,7 +788,7 @@ public class Catalog {
                 clusterId = Config.cluster_id == -1 ? Storage.newClusterID() : Config.cluster_id;
                 token = Strings.isNullOrEmpty(Config.auth_token) ?
                         Storage.newToken() : Config.auth_token;
-                storage = new Storage(clusterId, token, IMAGE_DIR);
+                storage = new Storage(clusterId, token, this.imageDir);
                 storage.writeClusterIdAndToken();
 
                 isFirstTimeStartUp = true;
@@ -820,7 +839,7 @@ public class Catalog {
 
             Pair<String, Integer> rightHelperNode = helperNodes.get(0);
 
-            Storage storage = new Storage(IMAGE_DIR);
+            Storage storage = new Storage(this.imageDir);
             if (roleFile.exists() && (role != storage.getRole() || !nodeName.equals(storage.getNodeName()))
                     || !roleFile.exists()) {
                 storage.writeFrontendRoleAndNodeName(role, nodeName);
@@ -834,7 +853,7 @@ public class Catalog {
 
                 // NOTE: cluster_id will be init when Storage object is constructed,
                 //       so we new one.
-                storage = new Storage(IMAGE_DIR);
+                storage = new Storage(this.imageDir);
                 clusterId = storage.getClusterID();
                 token = storage.getToken();
                 if (Strings.isNullOrEmpty(token)) {
@@ -1015,8 +1034,8 @@ public class Catalog {
         Preconditions.checkNotNull(deployManager);
 
         // 1. check if this is the first time to start up
-        File roleFile = new File(IMAGE_DIR, Storage.ROLE_FILE);
-        File versionFile = new File(IMAGE_DIR, Storage.VERSION_FILE);
+        File roleFile = new File(this.imageDir, Storage.ROLE_FILE);
+        File versionFile = new File(this.imageDir, Storage.VERSION_FILE);
         if ((roleFile.exists() && !versionFile.exists())
                 || (!roleFile.exists() && versionFile.exists())) {
             LOG.error("role file and version file must both exist or both not exist. "
@@ -1267,7 +1286,7 @@ public class Catalog {
     private boolean getVersionFileFromHelper(Pair<String, Integer> helperNode) throws IOException {
         try {
             String url = "http://" + helperNode.first + ":" + Config.http_port + "/version";
-            File dir = new File(IMAGE_DIR);
+            File dir = new File(this.imageDir);
             MetaHelper.getRemoteFile(url, HTTP_TIMEOUT_SECOND * 1000,
                     MetaHelper.getOutputStream(Storage.VERSION_FILE, dir));
             MetaHelper.complete(Storage.VERSION_FILE, dir);
@@ -1281,7 +1300,7 @@ public class Catalog {
 
     private void getNewImage(Pair<String, Integer> helperNode) throws IOException {
         long localImageVersion = 0;
-        Storage storage = new Storage(IMAGE_DIR);
+        Storage storage = new Storage(this.imageDir);
         localImageVersion = storage.getImageSeq();
 
         try {
@@ -1292,7 +1311,7 @@ public class Catalog {
                 String url = "http://" + helperNode.first + ":" + Config.http_port
                         + "/image?version=" + version;
                 String filename = Storage.IMAGE + "." + version;
-                File dir = new File(IMAGE_DIR);
+                File dir = new File(this.imageDir);
                 MetaHelper.getRemoteFile(url, HTTP_TIMEOUT_SECOND * 1000, MetaHelper.getOutputStream(filename, dir));
                 MetaHelper.complete(filename, dir);
             }
@@ -1762,9 +1781,9 @@ public class Catalog {
     // Only called by checkpoint thread
     public void saveImage() throws IOException {
         // Write image.ckpt
-        Storage storage = new Storage(IMAGE_DIR);
+        Storage storage = new Storage(this.imageDir);
         File curFile = storage.getImageFile(replayedJournalId.get());
-        File ckpt = new File(IMAGE_DIR, Storage.IMAGE_NEW);
+        File ckpt = new File(this.imageDir, Storage.IMAGE_NEW);
         saveImage(ckpt, replayedJournalId.get());
 
         // Move image.ckpt to image.dataVersion
@@ -4674,10 +4693,6 @@ public class Catalog {
         return this.canRead.get();
     }
 
-    public void setMetaDir(String metaDir) {
-        this.metaDir = metaDir;
-    }
-
     public boolean isElectable() {
         return this.isElectable;
     }
diff --git a/fe/src/main/java/org/apache/doris/common/Config.java b/fe/src/main/java/org/apache/doris/common/Config.java
index 4383c82db2..282a04dd87 100644
--- a/fe/src/main/java/org/apache/doris/common/Config.java
+++ b/fe/src/main/java/org/apache/doris/common/Config.java
@@ -17,6 +17,8 @@
 
 package org.apache.doris.common;
 
+import org.apache.doris.PaloFe;
+
 public class Config extends ConfigBase {
     
     /*
@@ -55,7 +57,8 @@ public class Config extends ConfigBase {
      *          60m     60 mins
      *          120s    120 seconds
      */
-    @ConfField public static String sys_log_dir = System.getenv("DORIS_HOME") + "/log";
+    @ConfField
+    public static String sys_log_dir = PaloFe.DORIS_HOME_DIR + "/log";
     @ConfField public static String sys_log_level = "INFO"; 
     @ConfField public static int sys_log_roll_num = 10;
     @ConfField public static String[] sys_log_verbose_modules = {};
@@ -90,7 +93,7 @@ public class Config extends ConfigBase {
      *          60m     60 mins
      *          120s    120 seconds
      */
-    @ConfField public static String audit_log_dir = System.getenv("DORIS_HOME") + "/log";
+    @ConfField public static String audit_log_dir = PaloFe.DORIS_HOME_DIR + "/log";
     @ConfField public static int audit_log_roll_num = 90;
     @ConfField public static String[] audit_log_modules = {"slow_query", "query"};
     @ConfField(mutable = true) public static long qe_slow_log_ms = 5000;
@@ -130,13 +133,13 @@ public class Config extends ConfigBase {
      * 1. High write performance (SSD)
      * 2. Safe (RAID)
      */
-    @ConfField public static String meta_dir = System.getenv("DORIS_HOME") + "/palo-meta";
+    @ConfField public static String meta_dir = PaloFe.DORIS_HOME_DIR + "/palo-meta";
     
     /*
      * temp dir is used to save intermediate results of some process, such as backup and restore process.
      * file in this dir will be cleaned after these process is finished.
      */
-    @ConfField public static String tmp_dir = System.getenv("DORIS_HOME") + "/temp_dir";
+    @ConfField public static String tmp_dir = PaloFe.DORIS_HOME_DIR + "/temp_dir";
     
     /*
      * Edit log type.
@@ -920,7 +923,7 @@ public class Config extends ConfigBase {
     /*
      * Save small files
      */
-    @ConfField public static String small_file_dir = System.getenv("DORIS_HOME") + "/small_files";
+    @ConfField public static String small_file_dir = PaloFe.DORIS_HOME_DIR + "/small_files";
     
     /*
      * The following 2 configs can set to true to disable the automatic colocate tables's relocate and balance.
diff --git a/fe/src/main/java/org/apache/doris/common/util/PrintableMap.java b/fe/src/main/java/org/apache/doris/common/util/PrintableMap.java
index 615211de5a..8c14b49882 100644
--- a/fe/src/main/java/org/apache/doris/common/util/PrintableMap.java
+++ b/fe/src/main/java/org/apache/doris/common/util/PrintableMap.java
@@ -29,6 +29,7 @@ public class PrintableMap<K, V> {
     private boolean withQuotation;
     private boolean wrap;
     private boolean hidePassword;
+    private String entryDelimiter = ",";
     
     public static final Set<String> SENSITIVE_KEY;
     static {
@@ -37,14 +38,20 @@ public class PrintableMap<K, V> {
         SENSITIVE_KEY.add("kerberos_keytab_content");
         SENSITIVE_KEY.add("bos_secret_accesskey");
     }
-
+    
     public PrintableMap(Map<K, V> map, String keyValueSaperator,
-                        boolean withQuotation, boolean wrap) {
+            boolean withQuotation, boolean wrap, String entryDelimiter) {
         this.map = map;
         this.keyValueSaperator = keyValueSaperator;
         this.withQuotation = withQuotation;
         this.wrap = wrap;
         this.hidePassword = false;
+        this.entryDelimiter = entryDelimiter;
+    }
+
+    public PrintableMap(Map<K, V> map, String keyValueSaperator,
+                        boolean withQuotation, boolean wrap) {
+        this(map, keyValueSaperator, withQuotation, wrap, ",");
     }
 
     public PrintableMap(Map<K, V> map, String keyValueSaperator,
@@ -79,10 +86,11 @@ public class PrintableMap<K, V> {
                 sb.append("\"");
             }
             if (iter.hasNext()) {
+                sb.append(entryDelimiter);
                 if (wrap) {
-                    sb.append(",\n");
+                    sb.append("\n");
                 } else {
-                    sb.append(", ");
+                    sb.append(" ");
                 }
             }
         }
diff --git a/fe/src/main/java/org/apache/doris/http/action/StaticResourceAction.java b/fe/src/main/java/org/apache/doris/http/action/StaticResourceAction.java
index 674c0d2d5f..89b668e433 100644
--- a/fe/src/main/java/org/apache/doris/http/action/StaticResourceAction.java
+++ b/fe/src/main/java/org/apache/doris/http/action/StaticResourceAction.java
@@ -17,6 +17,7 @@
 
 package org.apache.doris.http.action;
 
+import org.apache.doris.PaloFe;
 import org.apache.doris.http.ActionController;
 import org.apache.doris.http.BaseRequest;
 import org.apache.doris.http.BaseResponse;
@@ -116,7 +117,7 @@ public class StaticResourceAction extends WebBaseAction {
     }
 
     public static void registerAction(ActionController controller) throws IllegalArgException {
-        String httpDir = System.getenv("DORIS_HOME") + "/webroot";
+        String httpDir = PaloFe.DORIS_HOME_DIR + "/webroot";
         StaticResourceAction action = new StaticResourceAction(controller, httpDir + "/static");
         controller.registerHandler(HttpMethod.GET, "/static/js", action);
         controller.registerHandler(HttpMethod.GET, "/static/css", action);
diff --git a/fe/src/main/java/org/apache/doris/http/meta/MetaService.java b/fe/src/main/java/org/apache/doris/http/meta/MetaService.java
index 15ea6e45fd..3027424d33 100644
--- a/fe/src/main/java/org/apache/doris/http/meta/MetaService.java
+++ b/fe/src/main/java/org/apache/doris/http/meta/MetaService.java
@@ -179,7 +179,7 @@ public class MetaService {
                     + "/image?version=" + versionStr;
             String filename = Storage.IMAGE + "." + versionStr;
 
-            File dir = new File(Catalog.IMAGE_DIR);
+            File dir = new File(Catalog.getCurrentCatalog().getImageDir());
             try {
                 OutputStream out = MetaHelper.getOutputStream(filename, dir);
                 MetaHelper.getRemoteFile(url, TIMEOUT_SECOND * 1000, out);
diff --git a/fe/src/main/java/org/apache/doris/journal/bdbje/BDBJEJournal.java b/fe/src/main/java/org/apache/doris/journal/bdbje/BDBJEJournal.java
index cd48d45e17..6ef3d980ac 100644
--- a/fe/src/main/java/org/apache/doris/journal/bdbje/BDBJEJournal.java
+++ b/fe/src/main/java/org/apache/doris/journal/bdbje/BDBJEJournal.java
@@ -81,7 +81,7 @@ public class BDBJEJournal implements Journal {
      * node name is ip_port (the port is edit_log_port)
      */
     private void initBDBEnv(String nodeName) {
-        environmentPath = Catalog.BDB_DIR;
+        environmentPath = Catalog.getCurrentCatalog().getBdbDir();
         try {
             Pair<String, Integer> selfNode = Catalog.getInstance().getSelfNode();
             if (isPortUsing(selfNode.first, selfNode.second)) {
diff --git a/fe/src/main/java/org/apache/doris/journal/bdbje/BDBTool.java b/fe/src/main/java/org/apache/doris/journal/bdbje/BDBTool.java
index 23e33ff09e..aa8b616087 100644
--- a/fe/src/main/java/org/apache/doris/journal/bdbje/BDBTool.java
+++ b/fe/src/main/java/org/apache/doris/journal/bdbje/BDBTool.java
@@ -65,7 +65,7 @@ public class BDBTool {
             env = new Environment(new File(metaPath), envConfig);
         } catch (DatabaseException e) {
             e.printStackTrace();
-            System.err.println("Failed to open BDBJE env: " + Catalog.BDB_DIR + ". exit");
+            System.err.println("Failed to open BDBJE env: " + Catalog.getCurrentCatalog().getBdbDir() + ". exit");
             return false;
         }
         Preconditions.checkNotNull(env);
diff --git a/fe/src/main/java/org/apache/doris/load/DppScheduler.java b/fe/src/main/java/org/apache/doris/load/DppScheduler.java
index 4aeb170cf1..531486e811 100644
--- a/fe/src/main/java/org/apache/doris/load/DppScheduler.java
+++ b/fe/src/main/java/org/apache/doris/load/DppScheduler.java
@@ -17,6 +17,7 @@
 
 package org.apache.doris.load;
 
+import org.apache.doris.PaloFe;
 import org.apache.doris.common.Config;
 import org.apache.doris.common.FeConstants;
 import org.apache.doris.common.LoadException;
@@ -53,12 +54,11 @@ import java.util.concurrent.ConcurrentMap;
 public class DppScheduler {
     private static final Logger LOG = LogManager.getLogger(DppScheduler.class);
     
-    private static final String DORIS_HOME = System.getenv("DORIS_HOME");
-    private static final String HADOOP_CLIENT = DORIS_HOME + Config.dpp_hadoop_client_path;
+    private static final String HADOOP_CLIENT = PaloFe.DORIS_HOME_DIR + Config.dpp_hadoop_client_path;
     private static final String DPP_OUTPUT_DIR = "export";
-    private static final String JOB_CONFIG_DIR = DORIS_HOME + "/temp/job_conf";
+    private static final String JOB_CONFIG_DIR = PaloFe.DORIS_HOME_DIR + "/temp/job_conf";
     private static final String JOB_CONFIG_FILE = "jobconfig.json";
-    private static final String LOCAL_DPP_DIR = DORIS_HOME + "/lib/dpp/" + FeConstants.dpp_version;
+    private static final String LOCAL_DPP_DIR = PaloFe.DORIS_HOME_DIR + "/lib/dpp/" + FeConstants.dpp_version;
     private static final int DEFAULT_REDUCE_NUM = 1000;
     private static final long GB = 1024 * 1024 * 1024L;
 
diff --git a/fe/src/main/java/org/apache/doris/master/Checkpoint.java b/fe/src/main/java/org/apache/doris/master/Checkpoint.java
index 9c741ef8ac..1fa486c40e 100644
--- a/fe/src/main/java/org/apache/doris/master/Checkpoint.java
+++ b/fe/src/main/java/org/apache/doris/master/Checkpoint.java
@@ -55,7 +55,7 @@ public class Checkpoint extends MasterDaemon {
 
     public Checkpoint(EditLog editLog) {
         super("leaderCheckpointer", FeConstants.checkpoint_interval_second * 1000L);
-        this.imageDir = Catalog.IMAGE_DIR;
+        this.imageDir = Catalog.getCurrentCatalog().getImageDir();
         this.editLog = editLog;
     }
 
diff --git a/fe/src/main/java/org/apache/doris/master/MetaHelper.java b/fe/src/main/java/org/apache/doris/master/MetaHelper.java
index 4ae630e333..5071b1f47a 100644
--- a/fe/src/main/java/org/apache/doris/master/MetaHelper.java
+++ b/fe/src/main/java/org/apache/doris/master/MetaHelper.java
@@ -36,7 +36,7 @@ public class MetaHelper {
     private static final int CHECKPOINT_LIMIT_BYTES = 30 * 1024 * 1024;
 
     public static File getMasterImageDir() {
-        String metaDir = Catalog.IMAGE_DIR;
+        String metaDir = Catalog.getCurrentCatalog().getImageDir();
         return new File(metaDir);
     }
     
diff --git a/fe/src/main/java/org/apache/doris/qe/Coordinator.java b/fe/src/main/java/org/apache/doris/qe/Coordinator.java
index b42da95fe2..d798278f0d 100644
--- a/fe/src/main/java/org/apache/doris/qe/Coordinator.java
+++ b/fe/src/main/java/org/apache/doris/qe/Coordinator.java
@@ -492,8 +492,8 @@ public class Coordinator {
                             errMsg = "exec rpc error. backend id: " + pair.first.backend.getId();
                         }
                         queryStatus.setStatus(errMsg);
-                        LOG.warn("exec plan fragment failed, errmsg={}, fragmentId={}, backend={}:{}",
-                                 errMsg, fragment.getFragmentId(),
+                        LOG.warn("exec plan fragment failed, errmsg={}, code: {}, fragmentId={}, backend={}:{}",
+                                 errMsg, code, fragment.getFragmentId(),
                                  pair.first.address.hostname, pair.first.address.port);
                         cancelInternal(PPlanFragmentCancelReason.INTERNAL_ERROR);
                         switch (code) {
diff --git a/fe/src/main/java/org/apache/doris/rpc/AttachmentRequest.java b/fe/src/main/java/org/apache/doris/rpc/AttachmentRequest.java
index 166a9c93ec..568ba29527 100644
--- a/fe/src/main/java/org/apache/doris/rpc/AttachmentRequest.java
+++ b/fe/src/main/java/org/apache/doris/rpc/AttachmentRequest.java
@@ -22,7 +22,7 @@ import org.apache.thrift.TDeserializer;
 import org.apache.thrift.TException;
 import org.apache.thrift.TSerializer;
 
-// used to compatible with older our thrift protocol
+// used to compatible with our older thrift protocol
 public class AttachmentRequest {
     protected byte[] serializedRequest;
     protected byte[] serializedResult;
diff --git a/fe/src/test/java/org/apache/doris/utframe/AnotherDemoTest.java b/fe/src/test/java/org/apache/doris/utframe/AnotherDemoTest.java
new file mode 100644
index 0000000000..61a65679b4
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/AnotherDemoTest.java
@@ -0,0 +1,167 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.analysis.CreateDbStmt;
+import org.apache.doris.analysis.CreateTableStmt;
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.catalog.Database;
+import org.apache.doris.catalog.OlapTable;
+import org.apache.doris.common.DdlException;
+import org.apache.doris.common.Pair;
+import org.apache.doris.planner.OlapScanNode;
+import org.apache.doris.planner.PlanFragment;
+import org.apache.doris.planner.Planner;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.qe.StmtExecutor;
+import org.apache.doris.thrift.TNetworkAddress;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultBeThriftServiceImpl;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultHeartbeatServiceImpl;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultPBackendServiceImpl;
+import org.apache.doris.utframe.MockedFrontend.EnvVarNotSetException;
+import org.apache.doris.utframe.MockedFrontend.FeStartException;
+import org.apache.doris.utframe.MockedFrontend.NotInitException;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.UUID;
+
+/*
+ * This demo is mainly used to confirm that 
+ * repeatedly starting FE and BE in 2 UnitTest will not cause conflict
+ */
+public class AnotherDemoTest {
+
+    private static int fe_http_port;
+    private static int fe_rpc_port;
+    private static int fe_query_port;
+    private static int fe_edit_log_port;
+
+    private static int be_heartbeat_port;
+    private static int be_thrift_port;
+    private static int be_brpc_port;
+    private static int be_http_port;
+
+    // use a unique dir so that it won't be conflict with other unit test which
+    // may also start a Mocked Frontend
+    private static String runningDir = "fe/mocked/AnotherDemoTest/" + UUID.randomUUID().toString() + "/";
+
+    @BeforeClass
+    public static void beforeClass() throws EnvVarNotSetException, IOException,
+            FeStartException, NotInitException, DdlException, InterruptedException {
+        // get DORIS_HOME
+        final String dorisHome = System.getenv("DORIS_HOME");
+        if (Strings.isNullOrEmpty(dorisHome)) {
+            throw new EnvVarNotSetException("env DORIS_HOME is not set");
+        }
+
+        getRandomPort();
+
+        // start fe in "DORIS_HOME/fe/mocked/"
+        MockedFrontend frontend = MockedFrontend.getInstance();
+        Map<String, String> feConfMap = Maps.newHashMap();
+        // set additional fe config
+        feConfMap.put("http_port", String.valueOf(fe_http_port));
+        feConfMap.put("rpc_port", String.valueOf(fe_rpc_port));
+        feConfMap.put("query_port", String.valueOf(fe_query_port));
+        feConfMap.put("edit_log_port", String.valueOf(fe_edit_log_port));
+        feConfMap.put("tablet_create_timeout_second", "10");
+        frontend.init(dorisHome + "/" + runningDir, feConfMap);
+        frontend.start(new String[0]);
+
+        // start be
+        MockedBackend backend = MockedBackendFactory.createBackend("127.0.0.1",
+                be_heartbeat_port, be_thrift_port, be_brpc_port, be_http_port,
+                new DefaultHeartbeatServiceImpl(be_thrift_port, be_http_port, be_brpc_port),
+                new DefaultBeThriftServiceImpl(), new DefaultPBackendServiceImpl());
+        backend.setFeAddress(new TNetworkAddress("127.0.0.1", frontend.getRpcPort()));
+        backend.start();
+
+        // add be
+        List<Pair<String, Integer>> bes = Lists.newArrayList();
+        bes.add(Pair.create(backend.getHost(), backend.getHeartbeatPort()));
+        Catalog.getCurrentSystemInfo().addBackends(bes, false, "default_cluster");
+
+        // sleep to wait first heartbeat
+        Thread.sleep(5000);
+    }
+
+    // generate all port from between 20000 ~ 30000
+    private static void getRandomPort() {
+        Random r = new Random(System.currentTimeMillis());
+        int basePort = 20000 + r.nextInt(9000);
+        fe_http_port = basePort + 1;
+        fe_rpc_port = basePort + 2;
+        fe_query_port = basePort + 3;
+        fe_edit_log_port = basePort + 4;
+
+        be_heartbeat_port = basePort + 5;
+        be_thrift_port = basePort + 6;
+        be_brpc_port = basePort + 7;
+        be_http_port = basePort + 8;
+    }
+
+    @Test
+    public void testCreateDbAndTable() throws Exception {
+        // 1. create connect context
+        ConnectContext ctx = UtFrameUtils.createDefaultCtx();
+        // 2. create database db1
+        String createDbStmtStr = "create database db1;";
+        CreateDbStmt createDbStmt = (CreateDbStmt) UtFrameUtils.parseAndAnalyzeStmt(createDbStmtStr, ctx);
+        Catalog.getCurrentCatalog().createDb(createDbStmt);
+        System.out.println(Catalog.getCurrentCatalog().getDbNames());
+        // 3. create table tbl1
+        String createTblStmtStr = "create table db1.tbl1(k1 int) distributed by hash(k1) buckets 3 properties('replication_num' = '1');";
+        CreateTableStmt createTableStmt = (CreateTableStmt) UtFrameUtils.parseAndAnalyzeStmt(createTblStmtStr, ctx);
+        Catalog.getCurrentCatalog().createTable(createTableStmt);
+        // 4. get and test the created db and table
+        Database db = Catalog.getCurrentCatalog().getDb("default_cluster:db1");
+        Assert.assertNotNull(db);
+        db.readLock();
+        try {
+            OlapTable tbl = (OlapTable) db.getTable("tbl1");
+            Assert.assertNotNull(tbl);
+            System.out.println(tbl.getName());
+            Assert.assertEquals("Doris", tbl.getEngine());
+            Assert.assertEquals(1, tbl.getBaseSchema().size());
+        } finally {
+            db.readUnlock();
+        }
+        // 5. query
+        // TODO: we can not process real query for now. So it has to be a explain query
+        String queryStr = "explain select * from db1.tbl1";
+        StmtExecutor stmtExecutor = new StmtExecutor(ctx, queryStr);
+        stmtExecutor.execute();
+        Planner planner = stmtExecutor.planner();
+        List<PlanFragment> fragments = planner.getFragments();
+        Assert.assertEquals(1, fragments.size());
+        PlanFragment fragment = fragments.get(0);
+        Assert.assertTrue(fragment.getPlanRoot() instanceof OlapScanNode);
+        Assert.assertEquals(0, fragment.getChildren().size());
+    }
+}
diff --git a/fe/src/test/java/org/apache/doris/utframe/DemoTest.java b/fe/src/test/java/org/apache/doris/utframe/DemoTest.java
new file mode 100644
index 0000000000..a5498be1d9
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/DemoTest.java
@@ -0,0 +1,194 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.alter.AlterJobV2;
+import org.apache.doris.analysis.AlterTableStmt;
+import org.apache.doris.analysis.CreateDbStmt;
+import org.apache.doris.analysis.CreateTableStmt;
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.catalog.Database;
+import org.apache.doris.catalog.OlapTable;
+import org.apache.doris.common.DdlException;
+import org.apache.doris.common.Pair;
+import org.apache.doris.planner.OlapScanNode;
+import org.apache.doris.planner.PlanFragment;
+import org.apache.doris.planner.Planner;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.qe.StmtExecutor;
+import org.apache.doris.thrift.TNetworkAddress;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultBeThriftServiceImpl;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultHeartbeatServiceImpl;
+import org.apache.doris.utframe.MockedBackendFactory.DefaultPBackendServiceImpl;
+import org.apache.doris.utframe.MockedFrontend.EnvVarNotSetException;
+import org.apache.doris.utframe.MockedFrontend.FeStartException;
+import org.apache.doris.utframe.MockedFrontend.NotInitException;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.UUID;
+
+/*
+ * This demo shows how to run unit test with mocked FE and BE.
+ * It will
+ *  1. start a mocked FE and a mocked BE.
+ *  2. Create a database and a tbl.
+ *  3. Make a schema change to tbl.
+ *  4. send a query and get query plan
+ */
+public class DemoTest {
+
+    private static int fe_http_port;
+    private static int fe_rpc_port;
+    private static int fe_query_port;
+    private static int fe_edit_log_port;
+
+    private static int be_heartbeat_port;
+    private static int be_thrift_port;
+    private static int be_brpc_port;
+    private static int be_http_port;
+    // use a unique dir so that it won't be conflict with other unit test which
+    // may also start a Mocked Frontend
+    private static String runningDir = "fe/mocked/DemoTest/" + UUID.randomUUID().toString() + "/";
+
+    @BeforeClass
+    public static void beforeClass() throws EnvVarNotSetException, IOException,
+            FeStartException, NotInitException, DdlException, InterruptedException {
+        // get DORIS_HOME
+        final String dorisHome = System.getenv("DORIS_HOME");
+        if (Strings.isNullOrEmpty(dorisHome)) {
+            throw new EnvVarNotSetException("env DORIS_HOME is not set");
+        }
+
+        getRandomPort();
+
+        // start fe in "DORIS_HOME/fe/mocked/"
+        MockedFrontend frontend = MockedFrontend.getInstance();
+        Map<String, String> feConfMap = Maps.newHashMap();
+        // set additional fe config
+        feConfMap.put("http_port", String.valueOf(fe_http_port));
+        feConfMap.put("rpc_port", String.valueOf(fe_rpc_port));
+        feConfMap.put("query_port", String.valueOf(fe_query_port));
+        feConfMap.put("edit_log_port", String.valueOf(fe_edit_log_port));
+        feConfMap.put("tablet_create_timeout_second", "10");
+        frontend.init(dorisHome + "/" + runningDir, feConfMap);
+        frontend.start(new String[0]);
+
+        // start be
+        MockedBackend backend = MockedBackendFactory.createBackend("127.0.0.1",
+                be_heartbeat_port, be_thrift_port, be_brpc_port, be_http_port,
+                new DefaultHeartbeatServiceImpl(be_thrift_port, be_http_port, be_brpc_port),
+                new DefaultBeThriftServiceImpl(), new DefaultPBackendServiceImpl());
+        backend.setFeAddress(new TNetworkAddress("127.0.0.1", frontend.getRpcPort()));
+        backend.start();
+
+        // add be
+        List<Pair<String, Integer>> bes = Lists.newArrayList();
+        bes.add(Pair.create(backend.getHost(), backend.getHeartbeatPort()));
+        Catalog.getCurrentSystemInfo().addBackends(bes, false, "default_cluster");
+
+        // sleep to wait first heartbeat
+        Thread.sleep(6000);
+    }
+
+    // generate all port from between 20000 ~ 30000
+    private static void getRandomPort() {
+        Random r = new Random(System.currentTimeMillis());
+        int basePort = 20000 + r.nextInt(9000);
+        fe_http_port = basePort + 1;
+        fe_rpc_port = basePort + 2;
+        fe_query_port = basePort + 3;
+        fe_edit_log_port = basePort + 4;
+
+        be_heartbeat_port = basePort + 5;
+        be_thrift_port = basePort + 6;
+        be_brpc_port = basePort + 7;
+        be_http_port = basePort + 8;
+    }
+
+    @Test
+    public void testCreateDbAndTable() throws Exception {
+        // 1. create connect context
+        ConnectContext ctx = UtFrameUtils.createDefaultCtx();
+        // 2. create database db1
+        String createDbStmtStr = "create database db1;";
+        CreateDbStmt createDbStmt = (CreateDbStmt) UtFrameUtils.parseAndAnalyzeStmt(createDbStmtStr, ctx);
+        Catalog.getCurrentCatalog().createDb(createDbStmt);
+        System.out.println(Catalog.getCurrentCatalog().getDbNames());
+        // 3. create table tbl1
+        String createTblStmtStr = "create table db1.tbl1(k1 int) distributed by hash(k1) buckets 3 properties('replication_num' = '1');";
+        CreateTableStmt createTableStmt = (CreateTableStmt) UtFrameUtils.parseAndAnalyzeStmt(createTblStmtStr, ctx);
+        Catalog.getCurrentCatalog().createTable(createTableStmt);
+        // 4. get and test the created db and table
+        Database db = Catalog.getCurrentCatalog().getDb("default_cluster:db1");
+        Assert.assertNotNull(db);
+        db.readLock();
+        try {
+            OlapTable tbl = (OlapTable) db.getTable("tbl1");
+            Assert.assertNotNull(tbl);
+            System.out.println(tbl.getName());
+            Assert.assertEquals("Doris", tbl.getEngine());
+            Assert.assertEquals(1, tbl.getBaseSchema().size());
+        } finally {
+            db.readUnlock();
+        }
+        // 5. process a schema change job
+        String alterStmtStr = "alter table db1.tbl1 add column k2 int default '1'";
+        AlterTableStmt alterTableStmt = (AlterTableStmt) UtFrameUtils.parseAndAnalyzeStmt(alterStmtStr, ctx);
+        Catalog.getCurrentCatalog().getAlterInstance().processAlterTable(alterTableStmt);
+        // 6. check alter job
+        Map<Long, AlterJobV2> alterJobs = Catalog.getCurrentCatalog().getSchemaChangeHandler().getAlterJobsV2();
+        Assert.assertEquals(1, alterJobs.size());
+        for (AlterJobV2 alterJobV2 : alterJobs.values()) {
+            while (!alterJobV2.getJobState().isFinalState()) {
+                System.out.println("alter job " + alterJobV2.getDbId() + " is running. state: " + alterJobV2.getJobState());
+                Thread.sleep(5000);
+            }
+            System.out.println("alter job " + alterJobV2.getDbId() + " is done. state: " + alterJobV2.getJobState());
+            Assert.assertEquals(AlterJobV2.JobState.FINISHED, alterJobV2.getJobState());
+        }
+        db.readLock();
+        try {
+            OlapTable tbl = (OlapTable) db.getTable("tbl1");
+            Assert.assertEquals(2, tbl.getBaseSchema().size());
+        } finally {
+            db.readUnlock();
+        }
+        // 7. query
+        // TODO: we can not process real query for now. So it has to be a explain query
+        String queryStr = "explain select * from db1.tbl1";
+        StmtExecutor stmtExecutor = new StmtExecutor(ctx, queryStr);
+        stmtExecutor.execute();
+        Planner planner = stmtExecutor.planner();
+        List<PlanFragment> fragments = planner.getFragments();
+        Assert.assertEquals(1, fragments.size());
+        PlanFragment fragment = fragments.get(0);
+        Assert.assertTrue(fragment.getPlanRoot() instanceof OlapScanNode);
+        Assert.assertEquals(0, fragment.getChildren().size());
+    }
+}
diff --git a/fe/src/test/java/org/apache/doris/utframe/MockedBackend.java b/fe/src/test/java/org/apache/doris/utframe/MockedBackend.java
new file mode 100644
index 0000000000..bd65b6c26d
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/MockedBackend.java
@@ -0,0 +1,129 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.common.ThriftServer;
+import org.apache.doris.thrift.BackendService;
+import org.apache.doris.thrift.HeartbeatService;
+import org.apache.doris.thrift.TNetworkAddress;
+import org.apache.doris.utframe.MockedBackendFactory.BeThriftService;
+
+import com.baidu.jprotobuf.pbrpc.transport.RpcServer;
+
+import org.apache.thrift.TProcessor;
+
+import java.io.IOException;
+
+/*
+ * Mocked Backend
+ * A mocked Backend has 3 rpc services. 
+ *      HeartbeatService.Iface to handle heart beat from Frontend.
+ *      BeThriftService to handle agent tasks and other requests from Frontend.
+ *      BRpcService to handle the query request from Frontend.
+ *      
+ * Users can create a BE by customizing three rpc services.
+ * 
+ * Better to create a mocked Backend from MockedBackendFactory.
+ * In MockedBackendFactory, there default rpc service for above 3 rpc services.
+ */
+public class MockedBackend {
+
+    private ThriftServer heartbeatServer;
+    private ThriftServer beThriftServer;
+    private RpcServer rpcServer;
+    
+    private String host;
+    private int heartbeatPort;
+    private int thriftPort;
+    private int brpcPort;
+    private int httpPort;
+    // the fe address: fe host and fe rpc port.
+    // This must be set explicitly after creating mocked Backend
+    private TNetworkAddress feAddress;
+
+    public MockedBackend(String host, int heartbeatPort, int thriftPort, int brpcPort, int httpPort,
+            HeartbeatService.Iface hbService,
+            BeThriftService backendService,
+            Object pBackendService) throws IOException {
+
+        this.host = host;
+        this.heartbeatPort = heartbeatPort;
+        this.thriftPort = thriftPort;
+        this.brpcPort = brpcPort;
+        this.httpPort = httpPort;
+
+        createHeartbeatService(heartbeatPort, hbService);
+        createBeThriftService(thriftPort, backendService);
+        createBrpcService(brpcPort, pBackendService);
+
+        backendService.setBackend(this);
+        backendService.init();
+    }
+
+    public void setFeAddress(TNetworkAddress feAddress) {
+        this.feAddress = feAddress;
+    }
+
+    public TNetworkAddress getFeAddress() {
+        return feAddress;
+    }
+
+    public String getHost() {
+        return host;
+    }
+
+    public int getHeartbeatPort() {
+        return heartbeatPort;
+    }
+
+    public int getBeThriftPort() {
+        return thriftPort;
+    }
+
+    public int getBrpcPort() {
+        return brpcPort;
+    }
+
+    public int getHttpPort() {
+        return httpPort;
+    }
+
+    public void start() throws IOException {
+        heartbeatServer.start();
+        System.out.println("Be heartbeat service is started with port: " + heartbeatPort);
+        beThriftServer.start();
+        System.out.println("Be thrift service is started with port: " + thriftPort);
+        rpcServer.start(brpcPort);
+        System.out.println("Be brpc service is started with port: " + brpcPort);
+    }
+
+    private void createHeartbeatService(int heartbeatPort, HeartbeatService.Iface serviceImpl) throws IOException {
+        TProcessor tprocessor = new HeartbeatService.Processor<HeartbeatService.Iface>(serviceImpl);
+        heartbeatServer = new ThriftServer(heartbeatPort, tprocessor);
+    }
+
+    private void createBeThriftService(int beThriftPort, BackendService.Iface serviceImpl) throws IOException {
+        TProcessor tprocessor = new BackendService.Processor<BackendService.Iface>(serviceImpl);
+        beThriftServer = new ThriftServer(beThriftPort, tprocessor);
+    }
+
+    private void createBrpcService(int brpcPort, Object pBackendServiceImpl) {
+        rpcServer = new RpcServer();
+        rpcServer.registerService(pBackendServiceImpl);
+    }
+}
diff --git a/fe/src/test/java/org/apache/doris/utframe/MockedBackendFactory.java b/fe/src/test/java/org/apache/doris/utframe/MockedBackendFactory.java
new file mode 100644
index 0000000000..1253673416
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/MockedBackendFactory.java
@@ -0,0 +1,337 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.common.ClientPool;
+import org.apache.doris.proto.PCancelPlanFragmentRequest;
+import org.apache.doris.proto.PCancelPlanFragmentResult;
+import org.apache.doris.proto.PExecPlanFragmentResult;
+import org.apache.doris.proto.PFetchDataResult;
+import org.apache.doris.proto.PProxyRequest;
+import org.apache.doris.proto.PProxyResult;
+import org.apache.doris.proto.PQueryStatistics;
+import org.apache.doris.proto.PStatus;
+import org.apache.doris.proto.PTriggerProfileReportResult;
+import org.apache.doris.rpc.PExecPlanFragmentRequest;
+import org.apache.doris.rpc.PFetchDataRequest;
+import org.apache.doris.rpc.PTriggerProfileReportRequest;
+import org.apache.doris.thrift.BackendService;
+import org.apache.doris.thrift.FrontendService;
+import org.apache.doris.thrift.HeartbeatService;
+import org.apache.doris.thrift.TAgentPublishRequest;
+import org.apache.doris.thrift.TAgentResult;
+import org.apache.doris.thrift.TAgentTaskRequest;
+import org.apache.doris.thrift.TBackend;
+import org.apache.doris.thrift.TBackendInfo;
+import org.apache.doris.thrift.TCancelPlanFragmentParams;
+import org.apache.doris.thrift.TCancelPlanFragmentResult;
+import org.apache.doris.thrift.TDeleteEtlFilesRequest;
+import org.apache.doris.thrift.TEtlState;
+import org.apache.doris.thrift.TExecPlanFragmentParams;
+import org.apache.doris.thrift.TExecPlanFragmentResult;
+import org.apache.doris.thrift.TExportState;
+import org.apache.doris.thrift.TExportStatusResult;
+import org.apache.doris.thrift.TExportTaskRequest;
+import org.apache.doris.thrift.TFetchDataParams;
+import org.apache.doris.thrift.TFetchDataResult;
+import org.apache.doris.thrift.TFinishTaskRequest;
+import org.apache.doris.thrift.THeartbeatResult;
+import org.apache.doris.thrift.TMasterInfo;
+import org.apache.doris.thrift.TMiniLoadEtlStatusRequest;
+import org.apache.doris.thrift.TMiniLoadEtlStatusResult;
+import org.apache.doris.thrift.TMiniLoadEtlTaskRequest;
+import org.apache.doris.thrift.TRoutineLoadTask;
+import org.apache.doris.thrift.TScanBatchResult;
+import org.apache.doris.thrift.TScanCloseParams;
+import org.apache.doris.thrift.TScanCloseResult;
+import org.apache.doris.thrift.TScanNextBatchParams;
+import org.apache.doris.thrift.TScanOpenParams;
+import org.apache.doris.thrift.TScanOpenResult;
+import org.apache.doris.thrift.TSnapshotRequest;
+import org.apache.doris.thrift.TStatus;
+import org.apache.doris.thrift.TStatusCode;
+import org.apache.doris.thrift.TTabletStatResult;
+import org.apache.doris.thrift.TTransmitDataParams;
+import org.apache.doris.thrift.TTransmitDataResult;
+import org.apache.doris.thrift.TUniqueId;
+
+import com.baidu.jprotobuf.pbrpc.ProtobufRPCService;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Queues;
+
+import org.apache.thrift.TException;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.BlockingQueue;
+
+/*
+ * This class is used to create mock backends.
+ * Usage can be found in Demon.java's beforeClass()
+ * 
+ * 
+ */
+public class MockedBackendFactory {
+
+    public static final String BE_DEFAULT_IP = "127.0.0.1";
+    public static final int BE_DEFAULT_HEARTBEAT_PORT = 9050;
+    public static final int BE_DEFAULT_THRIFT_PORT = 9060;
+    public static final int BE_DEFAULT_BRPC_PORT = 8060;
+    public static final int BE_DEFAULT_HTTP_PORT = 8040;
+
+    // create a default mocked backend with 3 default rpc services
+    public static MockedBackend createDefaultBackend() throws IOException {
+        return createBackend(BE_DEFAULT_IP, BE_DEFAULT_HEARTBEAT_PORT, BE_DEFAULT_THRIFT_PORT, BE_DEFAULT_BRPC_PORT, BE_DEFAULT_HTTP_PORT,
+                new DefaultHeartbeatServiceImpl(BE_DEFAULT_THRIFT_PORT, BE_DEFAULT_HTTP_PORT, BE_DEFAULT_BRPC_PORT),
+                new DefaultBeThriftServiceImpl(), new DefaultPBackendServiceImpl());
+    }
+
+    // create a mocked backend with customize parameters
+    public static MockedBackend createBackend(String host, int heartbeatPort, int thriftPort, int brpcPort, int httpPort,
+            HeartbeatService.Iface hbService, BeThriftService beThriftService, Object pBackendService)
+            throws IOException {
+        MockedBackend backend = new MockedBackend(host, heartbeatPort, thriftPort, brpcPort, httpPort, hbService,
+                beThriftService, pBackendService);
+        return backend;
+    }
+
+    // the default hearbeat service.
+    // User can implement HeartbeatService.Iface to create other custom heartbeat service.
+    public static class DefaultHeartbeatServiceImpl implements HeartbeatService.Iface {
+        private int beThriftPort;
+        private int beHttpPort;
+        private int beBrpcPort;
+
+        public DefaultHeartbeatServiceImpl(int beThriftPort, int beHttpPort, int beBrpcPort) {
+            this.beThriftPort = beThriftPort;
+            this.beHttpPort = beHttpPort;
+            this.beBrpcPort = beBrpcPort;
+        }
+
+        @Override
+        public THeartbeatResult heartbeat(TMasterInfo master_info) throws TException {
+            TBackendInfo backendInfo = new TBackendInfo(beThriftPort, beHttpPort);
+            backendInfo.setBrpc_port(beBrpcPort);
+            THeartbeatResult result = new THeartbeatResult(new TStatus(TStatusCode.OK), backendInfo);
+            return result;
+        }
+    }
+    
+    // abstract BeThriftService.
+    // User can extends this abstract class to create other custom be thrift service
+    public static abstract class BeThriftService implements BackendService.Iface {
+        protected MockedBackend backend;
+
+        public void setBackend(MockedBackend backend) {
+            this.backend = backend;
+        }
+
+        public abstract void init();
+    }
+
+    // the default be thrift service extends from BeThriftService
+    public static class DefaultBeThriftServiceImpl extends BeThriftService {
+        // task queue to save all agent tasks coming from Frontend
+        private BlockingQueue<TAgentTaskRequest> taskQueue = Queues.newLinkedBlockingQueue();
+        private TBackend tBackend;
+        private long reportVersion = 0;
+
+        public DefaultBeThriftServiceImpl() {
+        }
+
+        @Override
+        public void init() {
+            tBackend = new TBackend(backend.getHost(), backend.getBeThriftPort(), backend.getHttpPort());
+            // start a thread to handle all agent tasks in taskQueue.
+            // Only return information that the task was successfully executed.
+            new Thread(new Runnable() {
+                @Override
+                public void run() {
+                    while (true) {
+                        try {
+                            TAgentTaskRequest request = taskQueue.take();
+                            System.out.println("get agent task request. type: " + request.getTask_type()
+                                    + ", signature: " + request.getSignature());
+                            TFinishTaskRequest finishTaskRequest = new TFinishTaskRequest(tBackend,
+                                    request.getTask_type(), request.getSignature(), new TStatus(TStatusCode.OK));
+                            finishTaskRequest.setReport_version(++reportVersion);
+
+                            FrontendService.Client client = ClientPool.frontendPool.borrowObject(backend.getFeAddress(), 2000);
+                            System.out.println("get fe " + backend.getFeAddress() + " client: " + client);
+                            client.finishTask(finishTaskRequest);
+                        } catch (Exception e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }).start();
+        }
+
+        @Override
+        public TExecPlanFragmentResult exec_plan_fragment(TExecPlanFragmentParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TCancelPlanFragmentResult cancel_plan_fragment(TCancelPlanFragmentParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TTransmitDataResult transmit_data(TTransmitDataParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TFetchDataResult fetch_data(TFetchDataParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TAgentResult submit_tasks(List<TAgentTaskRequest> tasks) throws TException {
+            for (TAgentTaskRequest request : tasks) {
+                taskQueue.add(request);
+                System.out.println("receive agent task request. type: " + request.getTask_type() + ", signature: "
+                        + request.getSignature());
+            }
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TAgentResult make_snapshot(TSnapshotRequest snapshot_request) throws TException {
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TAgentResult release_snapshot(String snapshot_path) throws TException {
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TAgentResult publish_cluster_state(TAgentPublishRequest request) throws TException {
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TAgentResult submit_etl_task(TMiniLoadEtlTaskRequest request) throws TException {
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TMiniLoadEtlStatusResult get_etl_status(TMiniLoadEtlStatusRequest request) throws TException {
+            return new TMiniLoadEtlStatusResult(new TStatus(TStatusCode.OK), TEtlState.FINISHED);
+        }
+
+        @Override
+        public TAgentResult delete_etl_files(TDeleteEtlFilesRequest request) throws TException {
+            return new TAgentResult(new TStatus(TStatusCode.OK));
+        }
+
+        @Override
+        public TStatus submit_export_task(TExportTaskRequest request) throws TException {
+            return new TStatus(TStatusCode.OK);
+        }
+
+        @Override
+        public TExportStatusResult get_export_status(TUniqueId task_id) throws TException {
+            return new TExportStatusResult(new TStatus(TStatusCode.OK), TExportState.FINISHED);
+        }
+
+        @Override
+        public TStatus erase_export_task(TUniqueId task_id) throws TException {
+            return new TStatus(TStatusCode.OK);
+        }
+
+        @Override
+        public TTabletStatResult get_tablet_stat() throws TException {
+            return new TTabletStatResult(Maps.newHashMap());
+        }
+
+        @Override
+        public TStatus submit_routine_load_task(List<TRoutineLoadTask> tasks) throws TException {
+            return new TStatus(TStatusCode.OK);
+        }
+
+        @Override
+        public TScanOpenResult open_scanner(TScanOpenParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TScanBatchResult get_next(TScanNextBatchParams params) throws TException {
+            return null;
+        }
+
+        @Override
+        public TScanCloseResult close_scanner(TScanCloseParams params) throws TException {
+            return null;
+        }
+    }
+
+    // The default Brpc service.
+    // TODO(cmy): Currently this service cannot correctly simulate the processing of query requests.
+    public static class DefaultPBackendServiceImpl {
+        @ProtobufRPCService(serviceName = "PBackendService", methodName = "exec_plan_fragment")
+        public PExecPlanFragmentResult exec_plan_fragment(PExecPlanFragmentRequest request) {
+            System.out.println("get exec_plan_fragment request");
+            PExecPlanFragmentResult result = new PExecPlanFragmentResult();
+            PStatus pStatus = new PStatus();
+            pStatus.status_code = 0;
+            result.status = pStatus;
+            return result;
+        }
+
+        @ProtobufRPCService(serviceName = "PBackendService", methodName = "cancel_plan_fragment")
+        public PCancelPlanFragmentResult cancel_plan_fragment(PCancelPlanFragmentRequest request) {
+            System.out.println("get cancel_plan_fragment request");
+            PCancelPlanFragmentResult result = new PCancelPlanFragmentResult();
+            PStatus pStatus = new PStatus();
+            pStatus.status_code = 0;
+            result.status = pStatus;
+            return result;
+        }
+
+        @ProtobufRPCService(serviceName = "PBackendService", methodName = "fetch_data")
+        public PFetchDataResult fetchDataAsync(PFetchDataRequest request) {
+            System.out.println("get fetch_data");
+            PFetchDataResult result = new PFetchDataResult();
+            PStatus pStatus = new PStatus();
+            pStatus.status_code = 0;
+
+            PQueryStatistics pQueryStatistics = new PQueryStatistics();
+            pQueryStatistics.scan_rows = 0L;
+            pQueryStatistics.scan_bytes = 0L;
+
+            result.status = pStatus;
+            result.packet_seq = 0L;
+            result.query_statistics = pQueryStatistics;
+            result.eos = true;
+            return result;
+        }
+
+        @ProtobufRPCService(serviceName = "PBackendService", methodName = "trigger_profile_report")
+        public PTriggerProfileReportResult triggerProfileReport(PTriggerProfileReportRequest request) {
+            return null;
+        }
+
+        @ProtobufRPCService(serviceName = "PBackendService", methodName = "get_info")
+        public PProxyResult getInfo(PProxyRequest request) {
+            return null;
+        }
+    }
+}
diff --git a/fe/src/test/java/org/apache/doris/utframe/MockedFrontend.java b/fe/src/test/java/org/apache/doris/utframe/MockedFrontend.java
new file mode 100644
index 0000000000..0768481001
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/MockedFrontend.java
@@ -0,0 +1,237 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.PaloFe;
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.common.util.PrintableMap;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.Maps;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Comparator;
+import java.util.Map;
+
+/*
+ * This class is used to start a Frontend process locally, for unit test.
+ * This is a singleton class. There can be only one instance of this class globally.
+ * Usage:
+ *      MockedFrontend mockedFrontend = MockedFrontend.getInstance();
+ *      mockedFrontend.init(confMap);
+ *      mockedFrontend.start(new String[0]);
+ *      
+ *      ...
+ *      
+ * confMap is a instance of Map<String, String>.
+ * Here you can add any FE configuration you want to add. For example:
+ *      confMap.put("http_port", "8032");
+ *      
+ * FrontendProcess already contains a minimal set of FE configurations.
+ * Any configuration in confMap will form the final fe.conf file with this minimal set.
+ *      
+ * 1 environment variable must be set:
+ *      DORIS_HOME/
+ * 
+ * The running dir is set when calling init();
+ * There will be 3 directories under running dir/:
+ *      running dir/conf/
+ *      running dir/log/
+ *      running dir/palo-meta/
+ *      
+ *  All these 3 directories will be cleared first.
+ *  
+ */
+public class MockedFrontend {
+    public static final String FE_PROCESS = "fe";
+
+    // the running dir of this mocked frontend.
+    // log/ palo-meta/ and conf/ dirs will be created under this dir.
+    private String runningDir;
+    // the min set of fe.conf.
+    private static final Map<String, String> MIN_FE_CONF;
+
+    private Map<String, String> finalFeConf;
+
+    static {
+        MIN_FE_CONF = Maps.newHashMap();
+        MIN_FE_CONF.put("sys_log_level", "INFO");
+        MIN_FE_CONF.put("http_port", "8030");
+        MIN_FE_CONF.put("rpc_port", "9020");
+        MIN_FE_CONF.put("query_port", "9030");
+        MIN_FE_CONF.put("edit_log_port", "9010");
+        MIN_FE_CONF.put("priority_networks", "127.0.0.1/24");
+        MIN_FE_CONF.put("sys_log_verbose_modules", "org");
+    }
+
+    private static class SingletonHolder {
+        private static final MockedFrontend INSTANCE = new MockedFrontend();
+    }
+
+    public static MockedFrontend getInstance() {
+        return SingletonHolder.INSTANCE;
+    }
+
+    public int getRpcPort() {
+        return Integer.valueOf(finalFeConf.get("rpc_port"));
+    }
+
+    private boolean isInit = false;
+
+    // init the fe process. This must be called before starting the frontend process.
+    // 1. check if all neccessary environment variables are set.
+    // 2. clear and create 3 dirs: runningDir/log/, runningDir/palo-meta/, runningDir/conf/
+    // 3. init fe.conf
+    //      The content of "fe.conf" is a merge set of input `feConf` and MIN_FE_CONF
+    public void init(String runningDir, Map<String, String> feConf) throws EnvVarNotSetException, IOException {
+        if (isInit) {
+            return;
+        }
+
+        if (Strings.isNullOrEmpty(runningDir)) {
+            System.err.println("running dir is not set for mocked frontend");
+            throw new EnvVarNotSetException("running dir is not set for mocked frontend");
+        }
+
+        this.runningDir = runningDir;
+        System.out.println("mocked frontend running in dir: " + this.runningDir);
+
+        // root running dir
+        createAndClearDir(this.runningDir);
+        // clear and create log dir
+        createAndClearDir(runningDir + "/log/");
+        // clear and create meta dir
+        createAndClearDir(runningDir + "/palo-meta/");
+        // clear and create conf dir
+        createAndClearDir(runningDir + "/conf/");
+        // init fe.conf
+        initFeConf(runningDir + "/conf/", feConf);
+
+        isInit = true;
+    }
+
+    private void initFeConf(String confDir, Map<String, String> feConf) throws IOException {
+        finalFeConf = Maps.newHashMap(MIN_FE_CONF);
+        // these 2 configs depends on running dir, so set them here.
+        finalFeConf.put("LOG_DIR", this.runningDir + "/log");
+        finalFeConf.put("meta_dir", this.runningDir + "/palo-meta");
+        finalFeConf.put("sys_log_dir", this.runningDir + "/log");
+        finalFeConf.put("audit_log_dir", this.runningDir + "/log");
+        finalFeConf.put("tmp_dir", this.runningDir + "/temp_dir");
+        // use custom config to add or override default config
+        finalFeConf.putAll(feConf);
+
+        PrintableMap<String, String> map = new PrintableMap<>(finalFeConf, "=", false, true, "");
+        File confFile = new File(confDir + "fe.conf");
+        if (!confFile.exists()) {
+            confFile.createNewFile();
+        }
+        PrintWriter printWriter = new PrintWriter(confFile);
+        try {
+            printWriter.print(map.toString());
+            printWriter.flush();
+        } finally {
+            printWriter.close();
+        }
+    }
+
+    // clear the specified dir, and create a empty one
+    private void createAndClearDir(String dir) throws IOException {
+        File localDir = new File(dir);
+        if (!localDir.exists()) {
+            localDir.mkdirs();
+        } else {
+            Files.walk(Paths.get(dir)).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);
+            if (!localDir.exists()) {
+                localDir.mkdirs();
+            }
+        }
+    }
+
+    public String getRunningDir() {
+        return runningDir;
+    }
+
+    private static class FERunnable implements Runnable {
+        private MockedFrontend frontend;
+        private String[] args;
+
+        public FERunnable(MockedFrontend frontend, String[] args) {
+            this.frontend = frontend;
+            this.args = args;
+        }
+
+        @Override
+        public void run() {
+            PaloFe.start(frontend.getRunningDir(), frontend.getRunningDir(), args);
+        }
+    }
+
+    // must call init() before start.
+    public void start(String[] args) throws FeStartException, NotInitException {
+        if (!isInit) {
+            throw new NotInitException("fe process is not initialized");
+        }
+        Thread feThread = new Thread(new FERunnable(this, args), FE_PROCESS);
+        feThread.start();
+        // wait the catalog to be ready until timeout (30 seconds)
+        waitForCatalogReady(30 * 1000);
+        System.out.println("Fe process is started");
+    }
+
+    private void waitForCatalogReady(long timeoutMs) throws FeStartException {
+        long left = timeoutMs;
+        while (!Catalog.getCurrentCatalog().isReady() && left > 0) {
+            System.out.println("catalog is not ready");
+            try {
+                Thread.sleep(5000);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            left -= 5000;
+        }
+
+        if (left <= 0 && !Catalog.getCurrentCatalog().isReady()) {
+            throw new FeStartException("fe start failed");
+        }
+    }
+
+    public static class FeStartException extends Exception {
+        public FeStartException(String msg) {
+            super(msg);
+        }
+    }
+
+    public static class EnvVarNotSetException extends Exception {
+        public EnvVarNotSetException(String msg) {
+            super(msg);
+        }
+    }
+
+    public static class NotInitException extends Exception {
+        public NotInitException(String msg) {
+            super(msg);
+        }
+    }
+
+}
diff --git a/fe/src/test/java/org/apache/doris/utframe/UtFrameUtils.java b/fe/src/test/java/org/apache/doris/utframe/UtFrameUtils.java
new file mode 100644
index 0000000000..d6811a246a
--- /dev/null
+++ b/fe/src/test/java/org/apache/doris/utframe/UtFrameUtils.java
@@ -0,0 +1,57 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.utframe;
+
+import org.apache.doris.analysis.Analyzer;
+import org.apache.doris.analysis.SqlParser;
+import org.apache.doris.analysis.SqlScanner;
+import org.apache.doris.analysis.StatementBase;
+import org.apache.doris.analysis.UserIdentity;
+import org.apache.doris.catalog.Catalog;
+import org.apache.doris.mysql.privilege.PaloAuth;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.system.SystemInfoService;
+
+import java.io.StringReader;
+
+public class UtFrameUtils {
+
+    // Help to create a mocked ConnectContext.
+    public static ConnectContext createDefaultCtx() {
+        ConnectContext ctx = new ConnectContext();
+        ctx.setCluster(SystemInfoService.DEFAULT_CLUSTER);
+        ctx.setCurrentUserIdentity(UserIdentity.ROOT);
+        ctx.setQualifiedUser(PaloAuth.ROOT_USER);
+        ctx.setCatalog(Catalog.getCurrentCatalog());
+        ctx.setThreadLocalInfo();
+        return ctx;
+    }
+
+    // Parse an origin stmt and analyze it. Return a StatementBase instance.
+    public static StatementBase parseAndAnalyzeStmt(String originStmt, ConnectContext ctx)
+            throws Exception {
+        System.out.println("begin to parse stmt: " + originStmt);
+        SqlScanner input = new SqlScanner(new StringReader(originStmt), ctx.getSessionVariable().getSqlMode());
+        SqlParser parser = new SqlParser(input);
+
+        StatementBase statementBase = (StatementBase) parser.parse().value;
+        Analyzer analyzer = new Analyzer(ctx.getCatalog(), ctx);
+        statementBase.analyze(analyzer);
+        return statementBase;
+    }
+}
diff --git a/run-fe-ut.sh b/run-fe-ut.sh
index 4d68a87dcd..e3b2705a49 100755
--- a/run-fe-ut.sh
+++ b/run-fe-ut.sh
@@ -90,7 +90,10 @@ if [ ${COVERAGE} -eq 1 ]; then
     ant cover-test
 else
     if [ ${RUN} -eq 1 ]; then
-        echo "Run the specified class"  
+        echo "Run the specified class: $1"
+        # eg:
+        # sh run-fe-ut.sh --run org.apache.doris.utframe.Demo
+        # sh run-fe-ut.sh --run org.apache.doris.utframe.Demo#testCreateDbAndTable+test2
         $MVN test -D test=$1
     else    
         echo "Run Frontend UT"