feature/qnode

source/libs/command/src/explain.c

@@ -52,15 +52,13 @@ void qExplainFreeCtx(SExplainCtx *pCtx) {
     void *pIter = taosHashIterate(pCtx->groupHash, NULL);
     while (pIter) {
       SExplainGroup *group = (SExplainGroup *)pIter;
-      if (NULL == group->nodeExecInfo) {
-        continue;
-      }
-      
+      if (group->nodeExecInfo) {
         int32_t num = taosArrayGetSize(group->nodeExecInfo);
         for (int32_t i = 0; i < num; ++i) {
           SExplainRsp *rsp = taosArrayGet(group->nodeExecInfo, i);
           taosMemoryFreeClear(rsp->subplanInfo);
         }
+      }
       
       pIter = taosHashIterate(pCtx->groupHash, pIter);
     }

source/libs/qworker/inc/qworkerInt.h

@@ -79,6 +79,7 @@ typedef struct SQWConnInfo {
 
 typedef struct SQWMsg {
   void        *node;
+  int32_t      code;
   char        *msg;
   int32_t      msgLen;
   SQWConnInfo  connInfo;

source/libs/qworker/src/qworker.c

@@ -536,6 +536,8 @@ int32_t qwDropTask(QW_FPARAMS_DEF) {
   QW_ERR_RET(qwDropTaskStatus(QW_FPARAMS()));
   QW_ERR_RET(qwDropTaskCtx(QW_FPARAMS()));
 
+  QW_TASK_DLOG_E("task is dropped");
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -1239,8 +1241,10 @@ int32_t qwProcessDrop(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
     QW_ERR_JRET(qwKillTaskHandle(QW_FPARAMS(), ctx));
     qwUpdateTaskStatus(QW_FPARAMS(), JOB_TASK_STATUS_DROPPING);
   } else if (ctx->phase > 0) {
+    if (0 == qwMsg->code) {
       qwBuildAndSendDropRsp(&qwMsg->connInfo, code);
       QW_TASK_DLOG("drop rsp send, handle:%p, code:%x - %s", qwMsg->connInfo.handle, code, tstrerror(code));
+    }
 
     QW_ERR_JRET(qwDropTask(QW_FPARAMS()));
     rsped = true;
@@ -1273,7 +1277,7 @@ _return:
     qwReleaseTaskCtx(mgmt, ctx);
   }
 
-  if (TSDB_CODE_SUCCESS != code) {
+  if ((TSDB_CODE_SUCCESS != code) && (0 == qwMsg->code)) {
     qwBuildAndSendDropRsp(&qwMsg->connInfo, code);
     QW_TASK_DLOG("drop rsp send, handle:%p, code:%x - %s", qwMsg->connInfo.handle, code, tstrerror(code));
   }

source/libs/qworker/src/qworkerMsg.c

@@ -549,7 +549,7 @@ int32_t qWorkerProcessDropMsg(void *node, void *qWorkerMgmt, SRpcMsg *pMsg) {
   uint64_t tId = msg->taskId;
   int64_t  rId = msg->refId;
 
-  SQWMsg qwMsg = {.node = node, .msg = NULL, .msgLen = 0};
+  SQWMsg qwMsg = {.node = node, .msg = NULL, .msgLen = 0, .code = pMsg->code};
   qwMsg.connInfo.handle = pMsg->handle;
   qwMsg.connInfo.ahandle = pMsg->ahandle;