add func dnodePutQhandleIntoReadQueue to simplify the refCount of vnode

src/dnode/src/dnodeVRead.c

@@ -179,6 +179,16 @@ void dnodeFreeVnodeRqueue(void *rqueue) {
   // dynamically adjust the number of threads
 }
 
+void dnodePutQhandleIntoReadQueue(void *pVnode, void *qhandle) {
+  SReadMsg *pRead = (SReadMsg *)taosAllocateQitem(sizeof(SReadMsg));
+  pRead->rpcMsg.msgType = TSDB_MSG_TYPE_QUERY;
+  pRead->pCont = qhandle;
+  pRead->contLen = 0;
+
+  taos_queue queue = vnodeAccquireRqueue(pVnode);
+  taosWriteQitem(queue, TAOS_QTYPE_QUERY, pRead);
+}
+
 static void dnodeContinueExecuteQuery(void* pVnode, void* qhandle, SReadMsg *pMsg) {
   SReadMsg *pRead = (SReadMsg *)taosAllocateQitem(sizeof(SReadMsg));
   pRead->rpcMsg      = pMsg->rpcMsg;
@@ -219,9 +229,14 @@ static void *dnodeProcessReadQueue(void *param) {
       break;
     }
 
-    dDebug("%p, msg:%s will be processed in vread queue", pReadMsg->rpcMsg.ahandle, taosMsg[pReadMsg->rpcMsg.msgType]);
+    dDebug("%p, msg:%s will be processed in vread queue, qtype:%d", pReadMsg->rpcMsg.ahandle,
+           taosMsg[pReadMsg->rpcMsg.msgType], type);
     int32_t code = vnodeProcessRead(pVnode, pReadMsg);
-    dnodeSendRpcReadRsp(pVnode, pReadMsg, code);
+
+    if (type == TAOS_QTYPE_RPC) {
+      dnodeSendRpcReadRsp(pVnode, pReadMsg, code);
+    }
+
     taosFreeQitem(pReadMsg);
   }
 

src/inc/dnode.h

@@ -53,6 +53,7 @@ void *dnodeAllocateVnodeWqueue(void *pVnode);
 void  dnodeFreeVnodeWqueue(void *queue);
 void *dnodeAllocateVnodeRqueue(void *pVnode);
 void  dnodeFreeVnodeRqueue(void *rqueue);
+void  dnodePutQhandleIntoReadQueue(void *pVnode, void *qhandle);
 void  dnodeSendRpcVnodeWriteRsp(void *pVnode, void *param, int32_t code);
 
 int32_t dnodeAllocateMnodePqueue();

src/inc/taosdef.h

@@ -365,6 +365,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
 #define TAOS_QTYPE_FWD      1
 #define TAOS_QTYPE_WAL      2 
 #define TAOS_QTYPE_CQ       3
+#define TAOS_QTYPE_QUERY    4
 
 typedef enum {
   TSDB_SUPER_TABLE        = 0,  // super table

src/inc/vnode.h

@@ -52,6 +52,7 @@ void    vnodeRelease(void *pVnode);
 void*   vnodeAccquireVnode(int32_t vgId); // add refcount 
 void*   vnodeGetVnode(int32_t vgId);      // keep refcount unchanged
 
+void*   vnodeAccquireRqueue(void *);
 void*   vnodeGetRqueue(void *);
 void*   vnodeGetWqueue(int32_t vgId);
 void*   vnodeGetWal(void *pVnode);

src/vnode/src/vnodeMain.c

@@ -393,6 +393,15 @@ void *vnodeAccquireVnode(int32_t vgId) {
   return pVnode;
 }
 
+void *vnodeAccquireRqueue(void *param) {
+  SVnodeObj *pVnode = param;
+  if (pVnode == NULL) return NULL;
+
+  atomic_add_fetch_32(&pVnode->refCount, 1);
+  vDebug("vgId:%d, get vnode rqueue, refCount:%d", pVnode->vgId, pVnode->refCount);
+  return ((SVnodeObj *)pVnode)->rqueue;
+}
+
 void *vnodeGetRqueue(void *pVnode) {
   return ((SVnodeObj *)pVnode)->rqueue;
 }