diff --git a/src/dnode/src/dnodeVRead.c b/src/dnode/src/dnodeVRead.c
index 7f1a5b2580b8d34ceb00398c19e7f6660faea606..2f9e9a0af9d6e573892a8e8cd01e3075b2a2bf7b 100644
--- a/src/dnode/src/dnodeVRead.c
+++ b/src/dnode/src/dnodeVRead.c
@@ -192,13 +192,14 @@ void dnodeSendRpcReadRsp(void *pVnode, SReadMsg *pRead, int32_t code) {
   if (code == TSDB_CODE_VND_ACTION_IN_PROGRESS) return;
   if (code == TSDB_CODE_VND_ACTION_NEED_REPROCESSED) {
     dnodeContinueExecuteQuery(pVnode, pRead->rspRet.qhandle, pRead);
+    code = TSDB_CODE_SUCCESS;
   }
 
   SRpcMsg rpcRsp = {
     .handle  = pRead->rpcMsg.handle,
     .pCont   = pRead->rspRet.rsp,
     .contLen = pRead->rspRet.len,
-    .code    = pRead->rspRet.code,
+    .code    = code,
   };
 
   rpcSendResponse(&rpcRsp);
@@ -216,7 +217,7 @@ static void *dnodeProcessReadQueue(void *param) {
       break;
     }
 
-    dTrace("%p, msg:%s will be processed", pReadMsg->rpcMsg.ahandle, taosMsg[pReadMsg->rpcMsg.msgType]);
+    dTrace("%p, msg:%s will be processed in vread queue", pReadMsg->rpcMsg.ahandle, taosMsg[pReadMsg->rpcMsg.msgType]);
     int32_t code = vnodeProcessRead(pVnode, pReadMsg->rpcMsg.msgType, pReadMsg->pCont, pReadMsg->contLen, &pReadMsg->rspRet);
     dnodeSendRpcReadRsp(pVnode, pReadMsg, code);
     taosFreeQitem(pReadMsg);
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index 53533b818388b7ff44674dbd8c841b0c347b3a55..e61364355d4a23dca823ed27a0876ee179a6fe19 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -216,7 +216,7 @@ static void *dnodeProcessWriteQueue(void *param) {
         pHead->msgType = pWrite->rpcMsg.msgType;
         pHead->version = 0;
         pHead->len = pWrite->contLen;
-        dTrace("%p, msg:%s will be processed", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
+        dTrace("%p, msg:%s will be processed in vwrite queue", pWrite->rpcMsg.ahandle, taosMsg[pWrite->rpcMsg.msgType]);
       } else {
         pHead = (SWalHead *)item;
       }
diff --git a/src/inc/vnode.h b/src/inc/vnode.h
index e507c55942bc6b4db682fd25739a9da34ce668fb..069f99263deeddfe0794437aa010b2b330dd4db9 100644
--- a/src/inc/vnode.h
+++ b/src/inc/vnode.h
@@ -30,7 +30,6 @@ typedef enum _VN_STATUS {
 
 typedef struct {
   int   len;
-  int   code;
   void *rsp;
   void *qhandle; //used by query and retrieve msg
 } SRspRet;
diff --git a/src/vnode/src/vnodeRead.c b/src/vnode/src/vnodeRead.c
index 2cf72bb15d68bbceb45eb4816b4b3f29099e8acb..f198c2ffe417ae918b14e291b7390466c62b11a5 100644
--- a/src/vnode/src/vnodeRead.c
+++ b/src/vnode/src/vnodeRead.c
@@ -39,15 +39,21 @@ void vnodeInitReadFp(void) {
 int32_t vnodeProcessRead(void *param, int msgType, void *pCont, int32_t contLen, SRspRet *ret) {
   SVnodeObj *pVnode = (SVnodeObj *)param;
 
-  if (vnodeProcessReadMsgFp[msgType] == NULL)
+  if (vnodeProcessReadMsgFp[msgType] == NULL) {
+    vTrace("vgId:%d, msgType:%s not processed, no handle", pVnode->vgId, taosMsg[msgType]);
     return TSDB_CODE_VND_MSG_NOT_PROCESSED;
+  }
 
-  if (pVnode->status == TAOS_VN_STATUS_DELETING || pVnode->status == TAOS_VN_STATUS_CLOSING) 
+  if (pVnode->status == TAOS_VN_STATUS_DELETING || pVnode->status == TAOS_VN_STATUS_CLOSING) {
+    vTrace("vgId:%d, msgType:%s not processed, vnode status is %d", pVnode->vgId, taosMsg[msgType], pVnode->status);
     return TSDB_CODE_VND_INVALID_VGROUP_ID; 
+  }
 
   // TODO: Later, let slave to support query
-  if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER)
+  if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER) {
+    vTrace("vgId:%d, msgType:%s not processed, replica:%d role:%d", pVnode->vgId, taosMsg[msgType], pVnode->syncCfg.replica, pVnode->role);
     return TSDB_CODE_RPC_NOT_READY;
+  }
 
   return (*vnodeProcessReadMsgFp[msgType])(pVnode, pCont, contLen, ret);
 }
@@ -60,11 +66,11 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, void *pCont, int32_t cont
 
   qinfo_t pQInfo = NULL;
   if (contLen != 0) {
-    pRet->code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, &pQInfo);
+    code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, &pQInfo);
 
     SQueryTableRsp *pRsp = (SQueryTableRsp *) rpcMallocCont(sizeof(SQueryTableRsp));
     pRsp->qhandle = htobe64((uint64_t) (pQInfo));
-    pRsp->code = pRet->code;
+    pRsp->code = code;
 
     pRet->len = sizeof(SQueryTableRsp);
     pRet->rsp = pRsp;
@@ -74,9 +80,11 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, void *pCont, int32_t cont
     assert(pCont != NULL);
     pQInfo = pCont;
     code = TSDB_CODE_VND_ACTION_IN_PROGRESS;
+    vTrace("vgId:%d, QInfo:%p, dnode query msg in progress", pVnode->vgId, pQInfo);
   }
 
   if (pQInfo != NULL) {
+    vTrace("vgId:%d, QInfo:%p, do qTableQuery", pVnode->vgId, pQInfo);
     qTableQuery(pQInfo); // do execute query
   }
 
@@ -88,18 +96,16 @@ static int32_t vnodeProcessFetchMsg(SVnodeObj *pVnode, void *pCont, int32_t cont
   void *pQInfo = (void*) htobe64(pRetrieve->qhandle);
   memset(pRet, 0, sizeof(SRspRet));
 
-  int32_t code = TSDB_CODE_SUCCESS;
-
   vTrace("vgId:%d, QInfo:%p, retrieve msg is received", pVnode->vgId, pQInfo);
   
-  pRet->code = qRetrieveQueryResultInfo(pQInfo);
-  if (pRet->code != TSDB_CODE_SUCCESS) {
+  int32_t code = qRetrieveQueryResultInfo(pQInfo);
+  if (code != TSDB_CODE_SUCCESS) {
     //TODO
     pRet->rsp = (SRetrieveTableRsp *)rpcMallocCont(sizeof(SRetrieveTableRsp));
     memset(pRet->rsp, 0, sizeof(SRetrieveTableRsp));
   } else {
     // todo check code and handle error in build result set
-    pRet->code = qDumpRetrieveResult(pQInfo, (SRetrieveTableRsp **)&pRet->rsp, &pRet->len);
+    code = qDumpRetrieveResult(pQInfo, (SRetrieveTableRsp **)&pRet->rsp, &pRet->len);
 
     if (qHasMoreResultsToRetrieve(pQInfo)) {
       pRet->qhandle = pQInfo;