diff --git a/src/dnode/src/dnodeMPeer.c b/src/dnode/src/dnodeMPeer.c
index b2491d4bfdd3289845f5df4ed5e76014b0cf8eaa..8414d79a9815287dfdfae3af5cc123304745c56d 100644
--- a/src/dnode/src/dnodeMPeer.c
+++ b/src/dnode/src/dnodeMPeer.c
@@ -33,7 +33,8 @@ typedef struct {
 } SMPeerWorker;
 
 typedef struct {
-  int32_t       num;
+  int32_t curNum;
+  int32_t maxNum;
   SMPeerWorker *peerWorker;
 } SMPeerWorkerPool;
 
@@ -46,37 +47,44 @@ static void *dnodeProcessMnodePeerQueue(void *param);
 int32_t dnodeInitMnodePeer() {
   tsMPeerQset = taosOpenQset();
   
-  tsMPeerPool.num = 1;
-  tsMPeerPool.peerWorker = (SMPeerWorker *)calloc(sizeof(SMPeerWorker), tsMPeerPool.num);
+  tsMPeerPool.maxNum = 1;
+  tsMPeerPool.curNum = 0;
+  tsMPeerPool.peerWorker = (SMPeerWorker *)calloc(sizeof(SMPeerWorker), tsMPeerPool.maxNum);
 
   if (tsMPeerPool.peerWorker == NULL) return -1;
-  for (int32_t i = 0; i < tsMPeerPool.num; ++i) {
+  for (int32_t i = 0; i < tsMPeerPool.maxNum; ++i) {
     SMPeerWorker *pWorker = tsMPeerPool.peerWorker + i;
     pWorker->workerId = i;
+    dDebug("dnode mpeer worker:%d is created", i);
   }
 
-  dInfo("dnode mpeer is opened");
+  dDebug("dnode mpeer is opened, workers:%d qset:%p", tsMPeerPool.maxNum, tsMPeerQset);
   return 0;
 }
 
 void dnodeCleanupMnodePeer() {
-  for (int32_t i = 0; i < tsMPeerPool.num; ++i) {
+  for (int32_t i = 0; i < tsMPeerPool.maxNum; ++i) {
     SMPeerWorker *pWorker = tsMPeerPool.peerWorker + i;
     if (pWorker->thread) {
       taosQsetThreadResume(tsMPeerQset);
     }
+    dDebug("dnode mpeer worker:%d is closed", i);
   }
 
-  for (int32_t i = 0; i < tsMPeerPool.num; ++i) {
+  for (int32_t i = 0; i < tsMPeerPool.maxNum; ++i) {
     SMPeerWorker *pWorker = tsMPeerPool.peerWorker + i;
+    dDebug("dnode mpeer worker:%d start to join", i);
     if (pWorker->thread) {
       pthread_join(pWorker->thread, NULL);
     }
+    dDebug("dnode mpeer worker:%d join success", i);
   }
 
+  dDebug("dnode mpeer is closed, qset:%p", tsMPeerQset);
+
   taosCloseQset(tsMPeerQset);
+  tsMPeerQset = NULL;
   taosTFree(tsMPeerPool.peerWorker);
-  dInfo("dnode mpeer is closed");
 }
 
 int32_t dnodeAllocateMnodePqueue() {
@@ -85,7 +93,7 @@ int32_t dnodeAllocateMnodePqueue() {
 
   taosAddIntoQset(tsMPeerQset, tsMPeerQueue, NULL);
 
-  for (int32_t i = 0; i < tsMPeerPool.num; ++i) {
+  for (int32_t i = tsMPeerPool.curNum; i < tsMPeerPool.maxNum; ++i) {
     SMPeerWorker *pWorker = tsMPeerPool.peerWorker + i;
     pWorker->workerId = i;
 
@@ -98,7 +106,9 @@ int32_t dnodeAllocateMnodePqueue() {
     }
 
     pthread_attr_destroy(&thAttr);
-    dDebug("dnode mpeer worker:%d is launched, total:%d", pWorker->workerId, tsMPeerPool.num);
+
+    tsMPeerPool.curNum = i + 1;
+    dDebug("dnode mpeer worker:%d is launched, total:%d", pWorker->workerId, tsMPeerPool.maxNum);
   }
 
   dDebug("dnode mpeer queue:%p is allocated", tsMPeerQueue);
@@ -106,6 +116,7 @@ int32_t dnodeAllocateMnodePqueue() {
 }
 
 void dnodeFreeMnodePqueue() {
+  dDebug("dnode mpeer queue:%p is freed", tsMPeerQueue);
   taosCloseQueue(tsMPeerQueue);
   tsMPeerQueue = NULL;
 }
diff --git a/src/dnode/src/dnodeMRead.c b/src/dnode/src/dnodeMRead.c
index a92c81a2f1f5eb832fe20e76d1fbb5a5dcf2a8fe..fdcbb5889f766ddebdb3f1e56ccffa0b5b129552 100644
--- a/src/dnode/src/dnodeMRead.c
+++ b/src/dnode/src/dnodeMRead.c
@@ -33,7 +33,8 @@ typedef struct {
 } SMReadWorker;
 
 typedef struct {
-  int32_t       num;
+  int32_t curNum;
+  int32_t maxNum;
   SMReadWorker *readWorker;
 } SMReadWorkerPool;
 
@@ -46,40 +47,46 @@ static void *dnodeProcessMnodeReadQueue(void *param);
 int32_t dnodeInitMnodeRead() {
   tsMReadQset = taosOpenQset();
 
-  tsMReadPool.num = tsNumOfCores * tsNumOfThreadsPerCore / 2;
-  tsMReadPool.num = MAX(2, tsMReadPool.num);
-  tsMReadPool.num = MIN(4, tsMReadPool.num);
-  tsMReadPool.readWorker = (SMReadWorker *)calloc(sizeof(SMReadWorker), tsMReadPool.num);
+  tsMReadPool.maxNum = tsNumOfCores * tsNumOfThreadsPerCore / 2;
+  tsMReadPool.maxNum = MAX(2, tsMReadPool.maxNum);
+  tsMReadPool.maxNum = MIN(4, tsMReadPool.maxNum);
+  tsMReadPool.curNum = 0;
+  tsMReadPool.readWorker = (SMReadWorker *)calloc(sizeof(SMReadWorker), tsMReadPool.maxNum);
 
   if (tsMReadPool.readWorker == NULL) return -1;
-  for (int32_t i = 0; i < tsMReadPool.num; ++i) {
+  for (int32_t i = 0; i < tsMReadPool.maxNum; ++i) {
     SMReadWorker *pWorker = tsMReadPool.readWorker + i;
     pWorker->workerId = i;
+    dDebug("dnode mread worker:%d is created", i);
   }
 
-  dInfo("dnode mread is opened");
+  dDebug("dnode mread is opened, workers:%d qset:%p", tsMReadPool.maxNum, tsMReadQset);
   return 0;
 }
 
 void dnodeCleanupMnodeRead() {
-  for (int32_t i = 0; i < tsMReadPool.num; ++i) {
+  for (int32_t i = 0; i < tsMReadPool.maxNum; ++i) {
     SMReadWorker *pWorker = tsMReadPool.readWorker + i;
     if (pWorker->thread) {
       taosQsetThreadResume(tsMReadQset);
     }
+    dDebug("dnode mread worker:%d is closed", i);
   }
 
-  for (int32_t i = 0; i < tsMReadPool.num; ++i) {
+  for (int32_t i = 0; i < tsMReadPool.maxNum; ++i) {
     SMReadWorker *pWorker = tsMReadPool.readWorker + i;
+    dDebug("dnode mread worker:%d start to join", i);
     if (pWorker->thread) {
       pthread_join(pWorker->thread, NULL);
     }
+    dDebug("dnode mread worker:%d start to join", i);
   }
 
+  dDebug("dnode mread is closed, qset:%p", tsMReadQset);
+
   taosCloseQset(tsMReadQset);
+  tsMReadQset = NULL;
   free(tsMReadPool.readWorker);
-
-  dInfo("dnode mread is closed");
 }
 
 int32_t dnodeAllocateMnodeRqueue() {
@@ -88,7 +95,7 @@ int32_t dnodeAllocateMnodeRqueue() {
 
   taosAddIntoQset(tsMReadQset, tsMReadQueue, NULL);
 
-  for (int32_t i = 0; i < tsMReadPool.num; ++i) {
+  for (int32_t i = tsMReadPool.curNum; i < tsMReadPool.maxNum; ++i) {
     SMReadWorker *pWorker = tsMReadPool.readWorker + i;
     pWorker->workerId = i;
 
@@ -101,7 +108,8 @@ int32_t dnodeAllocateMnodeRqueue() {
     }
 
     pthread_attr_destroy(&thAttr);
-    dDebug("dnode mread worker:%d is launched, total:%d", pWorker->workerId, tsMReadPool.num);
+    tsMReadPool.curNum = i + 1;
+    dDebug("dnode mread worker:%d is launched, total:%d", pWorker->workerId, tsMReadPool.maxNum);
   }
 
   dDebug("dnode mread queue:%p is allocated", tsMReadQueue);
@@ -109,6 +117,7 @@ int32_t dnodeAllocateMnodeRqueue() {
 }
 
 void dnodeFreeMnodeRqueue() {
+  dDebug("dnode mread queue:%p is freed", tsMReadQueue);
   taosCloseQueue(tsMReadQueue);
   tsMReadQueue = NULL;
 }
diff --git a/src/dnode/src/dnodeMWrite.c b/src/dnode/src/dnodeMWrite.c
index b1191e23a9a9aa9dfcbd4692c6ee7fe69ccaff72..384a0fae75088197d7fb01dd67c6e1b9d38739cd 100644
--- a/src/dnode/src/dnodeMWrite.c
+++ b/src/dnode/src/dnodeMWrite.c
@@ -34,7 +34,8 @@ typedef struct {
 } SMWriteWorker;
 
 typedef struct {
-  int32_t        num;
+  int32_t curNum;
+  int32_t maxNum;
   SMWriteWorker *writeWorker;
 } SMWriteWorkerPool;
 
@@ -47,38 +48,45 @@ static void *dnodeProcessMnodeWriteQueue(void *param);
 
 int32_t dnodeInitMnodeWrite() {
   tsMWriteQset = taosOpenQset();
-  
-  tsMWritePool.num = 1;
-  tsMWritePool.writeWorker = (SMWriteWorker *)calloc(sizeof(SMWriteWorker), tsMWritePool.num);
+
+  tsMWritePool.maxNum = 1;
+  tsMWritePool.curNum = 0;
+  tsMWritePool.writeWorker = (SMWriteWorker *)calloc(sizeof(SMWriteWorker), tsMWritePool.maxNum);
 
   if (tsMWritePool.writeWorker == NULL) return -1;
-  for (int32_t i = 0; i < tsMWritePool.num; ++i) {
+  for (int32_t i = 0; i < tsMWritePool.maxNum; ++i) {
     SMWriteWorker *pWorker = tsMWritePool.writeWorker + i;
     pWorker->workerId = i;
+    dDebug("dnode mwrite worker:%d is created", i);
   }
 
-  dInfo("dnode mwrite is opened");
+  dDebug("dnode mwrite is opened, workers:%d qset:%p", tsMWritePool.maxNum, tsMWriteQset);
   return 0;
 }
 
 void dnodeCleanupMnodeWrite() {
-  for (int32_t i = 0; i < tsMWritePool.num; ++i) {
+  for (int32_t i = 0; i < tsMWritePool.maxNum; ++i) {
     SMWriteWorker *pWorker = tsMWritePool.writeWorker + i;
     if (pWorker->thread) {
       taosQsetThreadResume(tsMWriteQset);
     }
+    dDebug("dnode mwrite worker:%d is closed", i);
   }
 
-  for (int32_t i = 0; i < tsMWritePool.num; ++i) {
+  for (int32_t i = 0; i < tsMWritePool.maxNum; ++i) {
     SMWriteWorker *pWorker = tsMWritePool.writeWorker + i;
+    dDebug("dnode mwrite worker:%d start to join", i);
     if (pWorker->thread) {
       pthread_join(pWorker->thread, NULL);
     }
+    dDebug("dnode mwrite worker:%d join success", i);
   }
 
+  dDebug("dnode mwrite is closed, qset:%p", tsMWriteQset);
+
   taosCloseQset(tsMWriteQset);
+  tsMWriteQset = NULL;
   taosTFree(tsMWritePool.writeWorker);
-  dInfo("dnode mwrite is closed");
 }
 
 int32_t dnodeAllocateMnodeWqueue() {
@@ -87,7 +95,7 @@ int32_t dnodeAllocateMnodeWqueue() {
 
   taosAddIntoQset(tsMWriteQset, tsMWriteQueue, NULL);
 
-  for (int32_t i = 0; i < tsMWritePool.num; ++i) {
+  for (int32_t i = tsMWritePool.curNum; i < tsMWritePool.maxNum; ++i) {
     SMWriteWorker *pWorker = tsMWritePool.writeWorker + i;
     pWorker->workerId = i;
 
@@ -100,7 +108,8 @@ int32_t dnodeAllocateMnodeWqueue() {
     }
 
     pthread_attr_destroy(&thAttr);
-    dDebug("dnode mwrite worker:%d is launched, total:%d", pWorker->workerId, tsMWritePool.num);
+    tsMWritePool.curNum = i + 1;
+    dDebug("dnode mwrite worker:%d is launched, total:%d", pWorker->workerId, tsMWritePool.maxNum);
   }
 
   dDebug("dnode mwrite queue:%p is allocated", tsMWriteQueue);
@@ -108,6 +117,7 @@ int32_t dnodeAllocateMnodeWqueue() {
 }
 
 void dnodeFreeMnodeWqueue() {
+  dDebug("dnode mwrite queue:%p is freed", tsMWriteQueue);
   taosCloseQueue(tsMWriteQueue);
   tsMWriteQueue = NULL;
 }
@@ -122,11 +132,15 @@ void dnodeDispatchToMnodeWriteQueue(SRpcMsg *pMsg) {
   SMnodeMsg *pWrite = (SMnodeMsg *)taosAllocateQitem(sizeof(SMnodeMsg));
   mnodeCreateMsg(pWrite, pMsg);
 
-  dDebug("app:%p:%p, msg:%s is put into mwrite queue", pWrite->rpcMsg.ahandle, pWrite, taosMsg[pWrite->rpcMsg.msgType]);
+  dDebug("app:%p:%p, msg:%s is put into mwrite queue:%p", pWrite->rpcMsg.ahandle, pWrite,
+         taosMsg[pWrite->rpcMsg.msgType], tsMWriteQueue);
   taosWriteQitem(tsMWriteQueue, TAOS_QTYPE_RPC, pWrite);
 }
 
 static void dnodeFreeMnodeWriteMsg(SMnodeMsg *pWrite) {
+  dDebug("app:%p:%p, msg:%s is freed from mwrite queue:%p", pWrite->rpcMsg.ahandle, pWrite,
+         taosMsg[pWrite->rpcMsg.msgType], tsMWriteQueue);
+
   mnodeCleanupMsg(pWrite);
   taosFreeQitem(pWrite);
 }
@@ -182,8 +196,8 @@ void dnodeReprocessMnodeWriteMsg(void *pMsg) {
     dnodeSendRedirectMsg(pMsg, true);
     dnodeFreeMnodeWriteMsg(pWrite);
   } else {
-    dDebug("app:%p:%p, msg:%s is reput into mwrite queue, retry times:%d", pWrite->rpcMsg.ahandle, pWrite,
-           taosMsg[pWrite->rpcMsg.msgType], pWrite->retry);
+    dDebug("app:%p:%p, msg:%s is reput into mwrite queue:%p, retry times:%d", pWrite->rpcMsg.ahandle, pWrite,
+           taosMsg[pWrite->rpcMsg.msgType], tsMWriteQueue, pWrite->retry);
 
     taosWriteQitem(tsMWriteQueue, TAOS_QTYPE_RPC, pWrite);
   }