[New Stmt] Support setting replica status manually (#1522)

Sometimes a replica is broken on BE, but FE does not notice that.
In this case, we have to manually delete that replica on BE.
If there are hundreds of replicas need to be handled, this is a disaster.

So I add a new stmt:

    ADMIN SET REPLICA STATUS

which support setting tablet on specified BE as BAD or OK.

fe/src/test/java/org/apache/doris/catalog/AdminStmtTest.java

@@ -0,0 +1,154 @@
+// 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.catalog;
+
+import org.apache.doris.analysis.AdminSetReplicaStatusStmt;
+import org.apache.doris.analysis.CreateDbStmt;
+import org.apache.doris.analysis.CreateTableStmt;
+import org.apache.doris.catalog.MaterializedIndex.IndexExtState;
+import org.apache.doris.catalog.Replica.ReplicaStatus;
+import org.apache.doris.common.AnalysisException;
+import org.apache.doris.common.Pair;
+import org.apache.doris.persist.SetReplicaStatusOperationLog;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.utframe.UtFrameUtils;
+
+import com.google.common.collect.Lists;
+
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.List;
+import java.util.UUID;
+
+public class AdminStmtTest {
+
+    // 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/AdminStmtTest/" + UUID.randomUUID().toString() + "/";
+
+    private static ConnectContext connectContext;
+
+    @BeforeClass
+    public static void beforeClass() throws Exception {
+        UtFrameUtils.createMinDorisCluster(runningDir);
+
+        // create connect context
+        connectContext = UtFrameUtils.createDefaultCtx();
+        // create database
+        String createDbStmtStr = "create database test;";
+        CreateDbStmt createDbStmt = (CreateDbStmt) UtFrameUtils.parseAndAnalyzeStmt(createDbStmtStr, connectContext);
+        Catalog.getCurrentCatalog().createDb(createDbStmt);
+        
+        String sql = "CREATE TABLE test.tbl1 (\n" +
+                "  `id` int(11) NULL COMMENT \"\",\n" +
+                "  `id2` bitmap bitmap_union NULL\n" +
+                ") ENGINE=OLAP\n" +
+                "AGGREGATE KEY(`id`)\n" +
+                "DISTRIBUTED BY HASH(`id`) BUCKETS 3\n" +
+                "PROPERTIES (\n" +
+                " \"replication_num\" = \"1\"\n" +
+                ");";
+        CreateTableStmt createTableStmt = (CreateTableStmt) UtFrameUtils.parseAndAnalyzeStmt(sql, connectContext);
+        Catalog.getCurrentCatalog().createTable(createTableStmt);
+    }
+
+    @AfterClass
+    public static void tearDown() {
+        File file = new File(runningDir);
+        file.delete();
+    }
+
+    @Test
+    public void testAdminSetReplicaStatus() throws Exception {
+        Database db = Catalog.getCurrentCatalog().getDb("default_cluster:test");
+        Assert.assertNotNull(db);
+        OlapTable tbl = (OlapTable) db.getTable("tbl1");
+        Assert.assertNotNull(tbl);
+        // tablet id, backend id
+        List<Pair<Long, Long>> tabletToBackendList = Lists.newArrayList();
+        for (Partition partition : tbl.getPartitions()) {
+            for (MaterializedIndex index : partition.getMaterializedIndices(IndexExtState.VISIBLE)) {
+                for (Tablet tablet : index.getTablets()) {
+                    for (Replica replica : tablet.getReplicas()) {
+                        tabletToBackendList.add(Pair.create(tablet.getId(), replica.getBackendId()));
+                    }
+                }
+            }
+        }
+        Assert.assertEquals(3, tabletToBackendList.size());
+        long tabletId = tabletToBackendList.get(0).first;
+        long backendId = tabletToBackendList.get(0).second;
+        Replica replica = Catalog.getCurrentInvertedIndex().getReplica(tabletId, backendId);
+        Assert.assertFalse(replica.isBad());
+
+        // set replica to bad
+        String adminStmt = "admin set replica status properties ('tablet_id' = '" + tabletId + "', 'backend_id' = '"
+                + backendId + "', 'status' = 'bad');";
+        AdminSetReplicaStatusStmt stmt = (AdminSetReplicaStatusStmt) UtFrameUtils.parseAndAnalyzeStmt(adminStmt, connectContext);
+        Catalog.getCurrentCatalog().setReplicaStatus(stmt);
+        replica = Catalog.getCurrentInvertedIndex().getReplica(tabletId, backendId);
+        Assert.assertTrue(replica.isBad());
+
+        // set replica to ok
+        adminStmt = "admin set replica status properties ('tablet_id' = '" + tabletId + "', 'backend_id' = '"
+                + backendId + "', 'status' = 'ok');";
+        stmt = (AdminSetReplicaStatusStmt) UtFrameUtils.parseAndAnalyzeStmt(adminStmt, connectContext);
+        Catalog.getCurrentCatalog().setReplicaStatus(stmt);
+        replica = Catalog.getCurrentInvertedIndex().getReplica(tabletId, backendId);
+        Assert.assertFalse(replica.isBad());
+    }
+    
+    @Test
+    public void testSetReplicaStatusOperationLog() throws IOException, AnalysisException {
+        String fileName = "./SetReplicaStatusOperationLog";
+        try {
+            // 1. Write objects to file
+            File file = new File(fileName);
+            file.createNewFile();
+            DataOutputStream out = new DataOutputStream(new FileOutputStream(file));
+            
+            SetReplicaStatusOperationLog log = new SetReplicaStatusOperationLog(10000, 100001, ReplicaStatus.BAD);
+            log.write(out);
+            out.flush();
+            out.close();
+            
+            // 2. Read objects from file
+            DataInputStream in = new DataInputStream(new FileInputStream(file));
+            
+            SetReplicaStatusOperationLog readLog = SetReplicaStatusOperationLog.read(in);
+            Assert.assertEquals(log.getBackendId(), readLog.getBackendId());
+            Assert.assertEquals(log.getTabletId(), readLog.getTabletId());
+            Assert.assertEquals(log.getReplicaStatus(), readLog.getReplicaStatus());
+            
+            in.close();
+        } finally {
+            File file = new File(fileName);
+            file.delete();
+        }
+    }
+
+}