diff --git a/include/libs/monitor/clientMonitor.h b/include/libs/monitor/clientMonitor.h
index 4c7ab6f65a..1e6db8c00a 100644
--- a/include/libs/monitor/clientMonitor.h
+++ b/include/libs/monitor/clientMonitor.h
@@ -65,7 +65,7 @@ typedef struct {
 } MonitorSlowLogData;
 
 void            monitorClose();
-void            monitorInit();
+int32_t         monitorInit();
 
 void            monitorClientSQLReqInit(int64_t clusterKey);
 void            monitorClientSlowQueryInit(int64_t clusterId);
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 3a821768f8..b227a6bd96 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -867,7 +867,10 @@ void taos_init_imp(void) {
     tscError("failed to init conv");
     return;
   }
-
+  if (monitorInit() != 0){
+    tscError("failed to init monitor");
+    return;
+  }
   rpcInit();
 
   SCatalogCfg cfg = {.maxDBCacheNum = 100, .maxTblCacheNum = 100};
@@ -891,7 +894,6 @@ void taos_init_imp(void) {
   taosThreadMutexInit(&appInfo.mutex, NULL);
 
   tscCrashReportInit();
-  monitorInit();
 
   tscDebug("client is initialized successfully");
 }
diff --git a/source/client/src/clientMonitor.c b/source/client/src/clientMonitor.c
index 479ea76fe3..c3345bf58d 100644
--- a/source/client/src/clientMonitor.c
+++ b/source/client/src/clientMonitor.c
@@ -18,6 +18,7 @@ int32_t     quitCnt = 0;
 tsem2_t     monitorSem;
 STaosQueue* monitorQueue;
 SHashObj*   monitorSlowLogHash;
+char        tmpSlowLogPath[PATH_MAX] = {0};
 
 static int32_t getSlowLogTmpDir(char* tmpPath, int32_t size){
   if (tsTempDir == NULL) {
@@ -690,28 +691,6 @@ static void* monitorThreadFunc(void *param){
   }
 #endif
 
-  char tmpPath[PATH_MAX] = {0};
-  if (getSlowLogTmpDir(tmpPath, sizeof(tmpPath)) < 0){
-    return NULL;
-  }
-
-  if (taosMulModeMkDir(tmpPath, 0777, true) != 0) {
-    terrno = TAOS_SYSTEM_ERROR(errno);
-    printf("failed to create dir:%s since %s", tmpPath, terrstr());
-    return NULL;
-  }
-
-  if (tsem2_init(&monitorSem, 0, 0) != 0) {
-    tscError("sem init error since %s", terrstr());
-    return NULL;
-  }
-
-  monitorQueue = taosOpenQueue();
-  if(monitorQueue == NULL){
-    tscError("open queue error since %s", terrstr());
-    return NULL;
-  }
-
   if (-1 != atomic_val_compare_exchange_32(&slowLogFlag, -1, 0)) {
     return NULL;
   }
@@ -747,7 +726,7 @@ static void* monitorThreadFunc(void *param){
           monitorSendAllSlowLogFromTempDir(slowLogData->clusterId);
         }
       } else if(slowLogData->type == SLOW_LOG_WRITE){
-        monitorWriteSlowLog2File(slowLogData, tmpPath);
+        monitorWriteSlowLog2File(slowLogData, tmpSlowLogPath);
       } else if(slowLogData->type == SLOW_LOG_READ_RUNNING){
         monitorSendSlowLogAtRunning(slowLogData->clusterId);
       } else if(slowLogData->type == SLOW_LOG_READ_QUIT){
@@ -799,27 +778,59 @@ static void tscMonitorStop() {
   }
 }
 
-void monitorInit() {
+int32_t monitorInit() {
   tscInfo("[monitor] tscMonitor init");
   monitorCounterHash = (SHashObj*)taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
   if (monitorCounterHash == NULL) {
     tscError("failed to create monitorCounterHash");
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
   }
   taosHashSetFreeFp(monitorCounterHash, destroyMonitorClient);
 
   monitorSlowLogHash = (SHashObj*)taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false, HASH_ENTRY_LOCK);
   if (monitorSlowLogHash == NULL) {
     tscError("failed to create monitorSlowLogHash");
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
   }
   taosHashSetFreeFp(monitorSlowLogHash, destroySlowLogClient);
 
   monitorTimer = taosTmrInit(0, 0, 0, "MONITOR");
   if (monitorTimer == NULL) {
     tscError("failed to create monitor timer");
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return -1;
+  }
+
+  if (getSlowLogTmpDir(tmpSlowLogPath, sizeof(tmpSlowLogPath)) < 0){
+    terrno = TSDB_CODE_TSC_INTERNAL_ERROR;
+    return -1;
+  }
+
+  if (taosMulModeMkDir(tmpSlowLogPath, 0777, true) != 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    tscError("failed to create dir:%s since %s", tmpSlowLogPath, terrstr());
+    return -1;
+  }
+
+  if (tsem2_init(&monitorSem, 0, 0) != 0) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    tscError("sem init error since %s", terrstr());
+    return -1;
+  }
+
+  monitorQueue = taosOpenQueue();
+  if(monitorQueue == NULL){
+    tscError("open queue error since %s", terrstr());
+    return -1;
   }
 
   taosInitRWLatch(&monitorLock);
-  tscMonitortInit();
+  if (tscMonitortInit() != 0){
+    return -1;
+  }
+  return 0;
 }
 
 void monitorClose() {
@@ -845,9 +856,6 @@ int32_t monitorPutData2MonitorQueue(MonitorSlowLogData data){
   }
   *slowLogData = data;
   tscDebug("[monitor] write slow log to queue, clusterId:%"PRIx64 " type:%d", slowLogData->clusterId, slowLogData->type);
-  while (atomic_load_32(&slowLogFlag) == -1) {
-    taosMsleep(5);
-  }
   if (taosWriteQitem(monitorQueue, slowLogData) == 0){
     tsem2_post(&monitorSem);
   }else{
diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index e5baa7137e..d587deffc5 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -154,13 +154,14 @@ int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
   if(taosHashGet(appInfo.pInstMapByClusterId, &connectRsp.clusterId, LONG_BYTES) == NULL){
     if(taosHashPut(appInfo.pInstMapByClusterId, &connectRsp.clusterId, LONG_BYTES, &pTscObj->pAppInfo, POINTER_BYTES) != 0){
       tscError("failed to put appInfo into appInfo.pInstMapByClusterId");
+    }else{
+      MonitorSlowLogData data = {0};
+      data.clusterId = pTscObj->pAppInfo->clusterId;
+      data.type = SLOW_LOG_READ_BEGINNIG;
+      monitorPutData2MonitorQueue(data);
+      monitorClientSlowQueryInit(connectRsp.clusterId);
+      monitorClientSQLReqInit(connectRsp.clusterId);
     }
-    MonitorSlowLogData data = {0};
-    data.clusterId = pTscObj->pAppInfo->clusterId;
-    data.type = SLOW_LOG_READ_BEGINNIG;
-    monitorPutData2MonitorQueue(data);
-    monitorClientSlowQueryInit(connectRsp.clusterId);
-    monitorClientSQLReqInit(connectRsp.clusterId);
   }
 
   taosThreadMutexLock(&clientHbMgr.lock);