diff --git a/pgjdbc/src/main/java/org/postgresql/GlobalConnectionTracker.java b/pgjdbc/src/main/java/org/postgresql/GlobalConnectionTracker.java
index cf32d72..14afce8 100644
--- a/pgjdbc/src/main/java/org/postgresql/GlobalConnectionTracker.java
+++ b/pgjdbc/src/main/java/org/postgresql/GlobalConnectionTracker.java
@@ -4,6 +4,7 @@ import org.postgresql.clusterhealthy.ClusterNodeCache;
 import org.postgresql.core.QueryExecutor;
 import org.postgresql.log.Log;
 import org.postgresql.log.Logger;
+import org.postgresql.util.HostSpec;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -58,6 +59,10 @@ public class GlobalConnectionTracker {
             hostConnection.put(identityQueryExecute, queryExecutor);
             connectionManager.put(hostSpec, hostConnection);
         }
+        if (isTargetServerMaster(props)) {
+            HostSpec[] hostSpecs = Driver.GetHostSpecs(props);
+            ClusterNodeCache.pushHostSpecs(queryExecutor.getHostSpec(), hostSpecs, props);
+        }
     }
 
     /**
@@ -80,11 +85,11 @@ public class GlobalConnectionTracker {
                 } else {
                     LOGGER.info("[SWITCHOVER] The identity of the queryExecutor has changed!");
                 }
+                ClusterNodeCache.updateDetection();
             } else {
                 LOGGER.info("[SWITCHOVER] No connection found under this host!");
             }
         }
-        ClusterNodeCache.updateDetection();
     }
 
     /**
@@ -118,7 +123,7 @@ public class GlobalConnectionTracker {
     public static void closeConnectionOfCrash(String hostSpec) {
         synchronized (connectionManager) {
             HashMap<Integer, QueryExecutor> hostConnection = connectionManager.getOrDefault(hostSpec, null);
-            if (hostConnection != null) {
+            if (hostConnection != null && !hostConnection.isEmpty()) {
                 LOGGER.debug("[CRASH] The hostSpec: " + hostSpec + " fails, start to close the original connection.");
                 for (QueryExecutor queryExecutor : hostConnection.values()) {
                     if (queryExecutor != null && !queryExecutor.isClosed()) {
diff --git a/pgjdbc/src/main/java/org/postgresql/PGProperty.java b/pgjdbc/src/main/java/org/postgresql/PGProperty.java
index 4675e42..df969e5 100644
--- a/pgjdbc/src/main/java/org/postgresql/PGProperty.java
+++ b/pgjdbc/src/main/java/org/postgresql/PGProperty.java
@@ -535,7 +535,18 @@ public enum PGProperty {
   /**
    * It is used to detect the thread interval of the survival task on the primary node in the high availability scenario.
    */
-  HEARTBEAT_PERIOD("heartbeatPeriod", "0", "heartbeat interval time")
+  HEARTBEAT_PERIOD("heartbeatPeriod", "0", "heartbeat interval time"),
+
+  /**
+   * In the scenario where heartbeat maintenance is enabled for the active node,
+   * if the active node is down, set the timeout threshold for searching for the active node.
+   * If the active node is not detected within this timeout period,
+   * the cluster is considered to have no active node and no maintenance is performed on the current cluster.
+   * This time should include the RTO time of the active node。
+   */
+  MASTER_FAILURE_HEARTBEAT_TIMEOUT("masterFailureHeartbeatTimeout", "30000", "In the scenario where heartbeat maintenance is enabled for the active node, " +
+          "if the active node is down, set the timeout threshold for searching for the active node. If the active node is not detected within this timeout period, " +
+          "the cluster is considered to have no active node and no maintenance is performed on the current cluster. This time should include the RTO time of the active node.")
 
   ;
 
diff --git a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeat.java b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeat.java
index c79e143..fad5279 100644
--- a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeat.java
+++ b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeat.java
@@ -33,7 +33,6 @@ import java.sql.SQLException;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashSet;
-import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
@@ -55,6 +54,7 @@ public class ClusterHeartBeat {
     private final ConnectionFactoryImpl FACTORY = new ConnectionFactoryImpl();
     private volatile boolean detection;
     private final Long DEFAULT_INTERVAL = 5000L;
+    private final String DEFAULT_TIMEOUT = "30000";
     private volatile AtomicLong periodTime = new AtomicLong(DEFAULT_INTERVAL);
 
 
@@ -64,8 +64,9 @@ public class ClusterHeartBeat {
     public void masterNodeProbe() {
         while (isOpen()) {
             // Detects whether the loop is broken
-            if (detection && !GlobalConnectionTracker.hasConnection()) {
+            if (detection && ClusterHeartBeatFailureCluster.getInstance().failureCluster.isEmpty() && !GlobalConnectionTracker.hasConnection()) {
                 ClusterNodeCache.stop();
+                LOGGER.debug("heartBeat thread stop");
                 break;
             }
             LOGGER.debug("heartBeat thread start time: " + new Date(System.currentTimeMillis()));
@@ -124,6 +125,12 @@ public class ClusterHeartBeat {
             long time = Long.parseLong(period);
             periodTime.set(Math.min(periodTime.get(), time));
         }
+        String timeout = PGProperty.MASTER_FAILURE_HEARTBEAT_TIMEOUT.get(properties);
+        if (!ClusterNodeCache.isNumeric(timeout)) {
+            LOGGER.debug("Invalid heartbeatPeriod value: " + timeout);
+            timeout = DEFAULT_TIMEOUT;
+        }
+        ClusterHeartBeatFailureCluster.getInstance().setThresholdValue((int) (Long.parseLong(timeout) / periodTime.get()));
     }
 
     /**
@@ -254,14 +261,14 @@ public class ClusterHeartBeat {
      * @param slaves   slaves set
      * @param props    the parsed/defaulted connection properties
      */
-    public void cacheProcess(HostSpec hostSpec, Set<HostSpec> slaves, Set<Properties> props) {
+    public void cacheProcess(HostSpec hostSpec, Set<HostSpec> slaves, Set<Properties> props, Integer frequency) {
         HostSpec maseterNode = findMasterNode(slaves, props);
         removeClusterNode(hostSpec, maseterNode, slaves);
         if (maseterNode != null) {
             addProperties(maseterNode, props);
             ClusterHeartBeatFailureMaster.getInstance().addFailureMaster(hostSpec, maseterNode);
         } else {
-            FailureCluster cluster = new FailureCluster(hostSpec, slaves, props);
+            FailureCluster cluster = new FailureCluster(hostSpec, slaves, props, frequency);
             ClusterHeartBeatFailureCluster.getInstance().addFailureCluster(cluster);
         }
         GlobalConnectionTracker.closeConnectionOfCrash(hostSpec.toString());
diff --git a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureCluster.java b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureCluster.java
index 4ac4404..6019d31 100644
--- a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureCluster.java
+++ b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureCluster.java
@@ -32,6 +32,7 @@ import java.util.Set;
 public class ClusterHeartBeatFailureCluster extends ClusterHeartBeat{
 
     public List<FailureCluster> failureCluster = new ArrayList<>();
+    private int thresholdValue;
     private volatile static ClusterHeartBeatFailureCluster clusterHeartBeatFailureCluster;
     private static Log LOGGER = Logger.getLogger(ClusterHeartBeatFailureCluster.class.getName());
     private ClusterHeartBeatFailureCluster() {
@@ -80,7 +81,10 @@ public class ClusterHeartBeatFailureCluster extends ClusterHeartBeat{
                 if (count == salves.size()) {
                     continue;
                 }
-                cacheProcess(cluster.getMaster(), salves, cluster.getProps());
+                int frequency = cluster.getFrequency();
+                if (thresholdValue > frequency) {
+                    cacheProcess(cluster.getMaster(), salves, cluster.getProps(), ++ frequency);
+                }
             }
             if (queryExecutor != null) {
                 boolean isMaster = nodeRoleIsMaster(queryExecutor);
@@ -112,4 +116,8 @@ public class ClusterHeartBeatFailureCluster extends ClusterHeartBeat{
         failureCluster.clear();
     }
 
+    public void setThresholdValue(int thresholdValue) {
+        this.thresholdValue = thresholdValue;
+    }
+
 }
diff --git a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatMaster.java b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatMaster.java
index 94120cf..810a733 100644
--- a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatMaster.java
+++ b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterHeartBeatMaster.java
@@ -71,13 +71,13 @@ public class ClusterHeartBeatMaster extends ClusterHeartBeat {
                 queryExecutor = super.getQueryExecutor(master, propertiesSet);
             } catch (SQLException e) {
                 LOGGER.debug("acquire QueryExecutor failure");
-                super.cacheProcess(master, slaves, propertiesSet);
+                super.cacheProcess(master, slaves, propertiesSet, null);
                 continue;
             }
             LOGGER.debug("Information about the current connected node " + queryExecutor.getSocketAddress());
             if (!super.nodeRoleIsMaster(queryExecutor)) {
                 LOGGER.debug(master + ":The host is degraded to the standby server.");
-                super.cacheProcess(master, slaves, propertiesSet);
+                super.cacheProcess(master, slaves, propertiesSet, null);
             }
         }
     }
diff --git a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterNodeCache.java b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterNodeCache.java
index 92e2424..ce80c87 100644
--- a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterNodeCache.java
+++ b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/ClusterNodeCache.java
@@ -87,17 +87,16 @@ public class ClusterNodeCache {
         Set<HostSpec> set = Arrays.stream(hostSpecs)
                 .collect(Collectors.toSet());
         String period = PGProperty.HEARTBEAT_PERIOD.get(properties);
-        boolean open = true;
         if (!isNumeric(period)) {
-            open = false;
             LOGGER.debug("Invalid heartbeatPeriod value: " + period);
+            return;
         }
         long timePeriod = Long.parseLong(period);
         if (timePeriod <= 0) {
-            open = false;
             LOGGER.debug("Invalid heartbeatPeriod value: " + period);
+            return;
         }
-        if (set.size() > 1 && open) {
+        if (set.size() > 1) {
             CLUSTER_HEART_BEAT.addNodeRelationship(master, hostSpecs, properties);
             start();
         }
@@ -127,10 +126,11 @@ public class ClusterNodeCache {
             CLUSTER_HEART_BEAT.clear();
             CLUSTER_HEART_BEAT.initPeriodTime();
             executorService.shutdown();
+            executorService = Executors.newSingleThreadExecutor();
         }
     }
 
-    private static boolean isNumeric(final CharSequence cs) {
+    public static boolean isNumeric(final CharSequence cs) {
         if (cs.length() == 0) {
             return false;
         }
diff --git a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/FailureCluster.java b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/FailureCluster.java
index 9af78d1..6eae3df 100644
--- a/pgjdbc/src/main/java/org/postgresql/clusterhealthy/FailureCluster.java
+++ b/pgjdbc/src/main/java/org/postgresql/clusterhealthy/FailureCluster.java
@@ -27,6 +27,7 @@ public class FailureCluster {
     private HostSpec master;
     private Set<HostSpec> salves;
     private Set<Properties> props;
+    private int frequency;
 
     /**
      *
@@ -34,10 +35,19 @@ public class FailureCluster {
      * @param salves Slave set
      * @param props Connection information
      */
-    public FailureCluster(HostSpec master, Set<HostSpec> salves, Set<Properties> props) {
+    public FailureCluster(HostSpec master, Set<HostSpec> salves, Set<Properties> props, Integer frequency) {
         this.master = master;
         this.salves = salves;
         this.props = props;
+        this.frequency = null == frequency ? 0 : frequency;
+    }
+
+    public int getFrequency() {
+        return frequency;
+    }
+
+    public void setFrequency(int frequency) {
+        this.frequency = frequency;
     }
 
     public void setSalves(Set<HostSpec> salves) {
@@ -63,4 +73,12 @@ public class FailureCluster {
     public Set<Properties> getProps() {
         return props;
     }
+
+    @Override
+    public String toString() {
+        return "FailureCluster{" +
+                "master=" + master +
+                ", salves=" + salves +
+                '}';
+    }
 }
diff --git a/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java b/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java
index 21fa3ae..0385865 100644
--- a/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java
+++ b/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java
@@ -330,9 +330,6 @@ public class ConnectionFactoryImpl extends ConnectionFactory {
           if (candidateHost.targetServerType != HostRequirement.any) {
             hostStatus = isMaster(queryExecutor) ? HostStatus.Master : HostStatus.Secondary;
             LOGGER.info("Known status of host " + hostSpec + " is " + hostStatus);
-            if (targetServerType == HostRequirement.master && hostStatus == HostStatus.Master) {
-              ClusterNodeCache.pushHostSpecs(hostSpec, currentHostSpecs, info);
-            }
           }
           GlobalHostStatusTracker.reportHostStatus(hostSpec, hostStatus, info);
           knownStates.put(hostSpec, hostStatus);
diff --git a/pgjdbc/src/test/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureClusterTest.java b/pgjdbc/src/test/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureClusterTest.java
index b787f1b..656c444 100644
--- a/pgjdbc/src/test/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureClusterTest.java
+++ b/pgjdbc/src/test/java/org/postgresql/clusterhealthy/ClusterHeartBeatFailureClusterTest.java
@@ -28,7 +28,7 @@ public class ClusterHeartBeatFailureClusterTest {
         hostSpecs.remove(master);
         HashSet<Properties> set = new HashSet<>();
         set.add(ClusterHeartBeatUtil.getProperties(getHostSpecs()));
-        FailureCluster failureCluster = new FailureCluster(master, new HashSet<>(hostSpecs), set);
+        FailureCluster failureCluster = new FailureCluster(master, new HashSet<>(hostSpecs), set, 0);
         clusterHeartBeatFailureCluster.addFailureCluster(failureCluster);
         System.out.println(clusterHeartBeatFailureCluster.getFailureCluster());
         clusterHeartBeatFailureCluster.run();