diff --git a/store/src/main/java/org/apache/rocketmq/store/ha/autoswitch/AutoSwitchHAService.java b/store/src/main/java/org/apache/rocketmq/store/ha/autoswitch/AutoSwitchHAService.java
index ed694799cb..7382587dcd 100644
--- a/store/src/main/java/org/apache/rocketmq/store/ha/autoswitch/AutoSwitchHAService.java
+++ b/store/src/main/java/org/apache/rocketmq/store/ha/autoswitch/AutoSwitchHAService.java
@@ -28,6 +28,9 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
 import java.util.function.Consumer;
 import org.apache.rocketmq.common.ThreadFactoryImpl;
 import org.apache.rocketmq.common.constant.LoggerName;
@@ -63,6 +66,8 @@ public class AutoSwitchHAService extends DefaultHAService {
     private EpochFileCache epochCache;
     private AutoSwitchHAClient haClient;
 
+    private ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
+
     public AutoSwitchHAService() {
     }
 
@@ -287,8 +292,14 @@ public class AutoSwitchHAService extends DefaultHAService {
     }
 
     @Override
-    public synchronized int inSyncReplicasNums(final long masterPutWhere) {
-        return syncStateSet.size();
+    public int inSyncReplicasNums(final long masterPutWhere) {
+        final Lock readLock = readWriteLock.readLock();
+        try {
+            readLock.lock();
+            return syncStateSet.size();
+        } finally {
+            readLock.unlock();
+        }
     }
 
     @Override
@@ -344,16 +355,28 @@ public class AutoSwitchHAService extends DefaultHAService {
         return confirmOffset;
     }
 
-    public synchronized void setSyncStateSet(final Set<String> syncStateSet) {
-        this.syncStateSet.clear();
-        this.syncStateSet.addAll(syncStateSet);
-        this.confirmOffset = computeConfirmOffset();
+    public void setSyncStateSet(final Set<String> syncStateSet) {
+        final Lock writeLock = readWriteLock.writeLock();
+        try {
+            writeLock.lock();
+            this.syncStateSet.clear();
+            this.syncStateSet.addAll(syncStateSet);
+            this.confirmOffset = computeConfirmOffset();
+        } finally {
+            writeLock.unlock();
+        }
     }
 
-    public synchronized Set<String> getSyncStateSet() {
-        HashSet<String> set = new HashSet<>(this.syncStateSet.size());
-        set.addAll(this.syncStateSet);
-        return set;
+    public Set<String> getSyncStateSet() {
+        final Lock readLock = readWriteLock.readLock();
+        try {
+            readLock.lock();
+            HashSet<String> set = new HashSet<>(this.syncStateSet.size());
+            set.addAll(this.syncStateSet);
+            return set;
+        } finally {
+            readLock.unlock();
+        }
     }
 
     public void truncateEpochFilePrefix(final long offset) {