diff --git a/source/libs/monitor/inc/monInt.h b/source/libs/monitor/inc/monInt.h
index ca5aaf0a388826d0ba4acd329296337d5e491a0e..65e47ef90cf992b51d381f7dff3a1d65dfd0becb 100644
--- a/source/libs/monitor/inc/monInt.h
+++ b/source/libs/monitor/inc/monInt.h
@@ -34,11 +34,11 @@ typedef struct SMonInfo {
 } SMonInfo;
 
 typedef struct {
-  pthread_rwlock_t rwlock;
-  SArray          *logs;  // array of SMonLogItem
-  int32_t          maxLogs;
-  const char      *server;
-  uint16_t         port;
+  pthread_mutex_t lock;
+  SArray         *logs;  // array of SMonLogItem
+  int32_t         maxLogs;
+  const char     *server;
+  uint16_t        port;
 } SMonitor;
 
 #ifdef __cplusplus
diff --git a/source/libs/monitor/src/monitor.c b/source/libs/monitor/src/monitor.c
index a50b8c3e90b56db1acbe8cfad9d2ab9c238b72d7..f278a41534a4c1d679974665ab7d98c79383c67e 100644
--- a/source/libs/monitor/src/monitor.c
+++ b/source/libs/monitor/src/monitor.c
@@ -23,7 +23,7 @@
 static SMonitor tsMonitor = {0};
 
 void monRecordLog(int64_t ts, ELogLevel level, const char *content) {
-  pthread_rwlock_rdlock(&tsMonitor.rwlock);
+  pthread_mutex_lock(&tsMonitor.lock);
   int32_t size = taosArrayGetSize(tsMonitor.logs);
   if (size >= tsMonitor.maxLogs) {
     uInfo("too many logs for monitor");
@@ -34,7 +34,7 @@ void monRecordLog(int64_t ts, ELogLevel level, const char *content) {
       tstrncpy(pItem->content, content, sizeof(item.content));
     }
   }
-  pthread_rwlock_unlock(&tsMonitor.rwlock);
+  pthread_mutex_unlock(&tsMonitor.lock);
 }
 
 int32_t monInit(const SMonCfg *pCfg) {
@@ -48,14 +48,14 @@ int32_t monInit(const SMonCfg *pCfg) {
   tsMonitor.server = pCfg->server;
   tsMonitor.port = pCfg->port;
   tsLogFp = monRecordLog;
-  pthread_rwlock_init(&tsMonitor.rwlock, NULL);
+  pthread_mutex_init(&tsMonitor.lock, NULL);
   return 0;
 }
 
 void monCleanup() {
   taosArrayDestroy(tsMonitor.logs);
   tsMonitor.logs = NULL;
-  pthread_rwlock_wrlock(&tsMonitor.rwlock);
+  pthread_mutex_destroy(&tsMonitor.lock);
 }
 
 SMonInfo *monCreateMonitorInfo() {
@@ -65,10 +65,10 @@ SMonInfo *monCreateMonitorInfo() {
     return NULL;
   }
 
-  pthread_rwlock_wrlock(&tsMonitor.rwlock);
+  pthread_mutex_lock(&tsMonitor.lock);
   pMonitor->logs = taosArrayDup(tsMonitor.logs);
   taosArrayClear(tsMonitor.logs);
-  pthread_rwlock_unlock(&tsMonitor.rwlock);
+  pthread_mutex_unlock(&tsMonitor.lock);
 
   pMonitor->pJson = tjsonCreateObject();
   if (pMonitor->pJson == NULL || pMonitor->logs == NULL) {