[TD-93] fix deadlocks in dnode

src/mnode/src/mgmtDnode.c

@@ -182,7 +182,7 @@ void mgmtProcessCfgDnodeMsg(SQueuedMsg *pMsg) {
 }
 
 static void mgmtProcessCfgDnodeMsgRsp(SRpcMsg *rpcMsg) {
-  mPrint("cfg vnode rsp is received");
+  mPrint("cfg vnode rsp is received, result:%s", tstrerror(rpcMsg->code));
 }
 
 void mgmtProcessDnodeStatusMsg(SRpcMsg *rpcMsg) {

src/util/src/tglobalcfg.c

@@ -995,7 +995,7 @@ int tsCfgDynamicOptions(char *msg) {
   int   vint = 0;
 
   paGetToken(msg, &option, &olen);
-  if (olen == 0) return code;
+  if (olen == 0) return TSDB_CODE_INVALID_MSG_CONTENT;
 
   paGetToken(option + olen + 1, &value, &vlen);
   if (vlen == 0)

src/vnode/main/src/vnodeMain.c

@@ -232,8 +232,11 @@ static void vnodeBuildVloadMsg(char *pNode, void * param) {
 }
 
 static void vnodeCleanUp(SVnodeObj *pVnode) {
-  taosDeleteIntHash(tsDnodeVnodesHash, pVnode->vgId);
-
+  if (pVnode->status == VN_STATUS_DELETING) {
+    // fix deadlock occured while close system
+    taosDeleteIntHash(tsDnodeVnodesHash, pVnode->vgId);
+  }
+  
   //syncStop(pVnode->sync);
   tsdbCloseRepo(pVnode->tsdb);
   walClose(pVnode->wal);