fix invalid db err while process connect req

source/dnode/mnode/impl/src/mndProfile.c

@@ -180,6 +180,11 @@ static void mndCancelGetNextConn(SMnode *pMnode, void *pIter) {
 
 static int32_t mndProcessConnectReq(SMnodeMsg *pReq) {
   SMnode   *pMnode = pReq->pMnode;
+  SUserObj *pUser = NULL;
+  SDbObj   *pDb = NULL;
+  SConnObj *pConn = NULL;
+  int32_t   code = -1;
+
   SConnectReq *pConnReq = pReq->rpcMsg.pCont;
   pConnReq->pid = htonl(pConnReq->pid);
   pConnReq->startTime = htobe64(pConnReq->startTime);
@@ -187,54 +192,61 @@ static int32_t mndProcessConnectReq(SMnodeMsg *pReq) {
   SRpcConnInfo info = {0};
   if (rpcGetConnInfo(pReq->rpcMsg.handle, &info) != 0) {
     mError("user:%s, failed to login while get connection info since %s", pReq->user, terrstr());
-    return -1;
+    goto CONN_OVER;
   }
 
   char ip[30];
   taosIp2String(info.clientIp, ip);
 
+  pUser = mndAcquireUser(pMnode, pReq->user);
+  if (pUser == NULL) {
+    mError("user:%s, failed to login while acquire user since %s", pReq->user, terrstr());
+    goto CONN_OVER;
+  }
+
   if (pConnReq->db[0]) {
-    snprintf(pReq->db, TSDB_DB_FNAME_LEN, "%d%s%s", pReq->acctId, TS_PATH_DELIMITER, pConnReq->db);
+    snprintf(pReq->db, TSDB_DB_FNAME_LEN, "%d%s%s", pUser->acctId, TS_PATH_DELIMITER, pConnReq->db);
-    SDbObj *pDb = mndAcquireDb(pMnode, pReq->db);
+    pDb = mndAcquireDb(pMnode, pReq->db);
     if (pDb == NULL) {
       terrno = TSDB_CODE_MND_INVALID_DB;
       mError("user:%s, failed to login from %s while use db:%s since %s", pReq->user, ip, pConnReq->db, terrstr());
-      return -1;
+      goto CONN_OVER;
     }
-    mndReleaseDb(pMnode, pDb);
   }
 
-  SConnObj *pConn = mndCreateConn(pMnode, &info, pConnReq->pid, pConnReq->app, pConnReq->startTime);
+  pConn = mndCreateConn(pMnode, &info, pConnReq->pid, pConnReq->app, pConnReq->startTime);
   if (pConn == NULL) {
     mError("user:%s, failed to login from %s while create connection since %s", pReq->user, ip, terrstr());
-    return -1;
+    goto CONN_OVER;
   }
 
   SConnectRsp *pRsp = rpcMallocCont(sizeof(SConnectRsp));
   if (pRsp == NULL) {
-    mndReleaseConn(pMnode, pConn);
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     mError("user:%s, failed to login from %s while create rsp since %s", pReq->user, ip, terrstr());
-    return -1;
+    goto CONN_OVER;
   }
 
-  SUserObj *pUser = mndAcquireUser(pMnode, pReq->user);
-  if (pUser != NULL) {
   pRsp->acctId = htonl(pUser->acctId);
   pRsp->superUser = pUser->superUser;
-    mndReleaseUser(pMnode, pUser);
-  }
-
   pRsp->clusterId = htobe64(pMnode->clusterId);
   pRsp->connId = htonl(pConn->id);
   mndGetMnodeEpSet(pMnode, &pRsp->epSet);
-  mndReleaseConn(pMnode, pConn);
 
   pReq->contLen = sizeof(SConnectRsp);
   pReq->pCont = pRsp;
 
   mDebug("user:%s, login from %s, conn:%d, app:%s", info.user, ip, pConn->id, pConnReq->app);
-  return 0;
+
+  code = 0;
+
+CONN_OVER:
+
+  mndReleaseUser(pMnode, pUser);
+  mndReleaseDb(pMnode, pDb);
+  mndReleaseConn(pMnode, pConn);
+
+  return code;
 }
 
 static int32_t mndSaveQueryStreamList(SConnObj *pConn, SHeartBeatReq *pReq) {
@@ -269,22 +281,16 @@ static int32_t mndProcessHeartBeatReq(SMnodeMsg *pReq) {
   batchRsp.rsps = taosArrayInit(0, sizeof(SClientHbRsp));
 
   for (int i = 0; i < sz; i++) {
-    SClientHbReq* pHbReq = taosArrayGet(pArray, i);
+    SClientHbReq *pHbReq = taosArrayGet(pArray, i);
     if (pHbReq->connKey.hbType == HEARTBEAT_TYPE_QUERY) {
-
     } else if (pHbReq->connKey.hbType == HEARTBEAT_TYPE_MQ) {
-      SClientHbRsp rsp = {
+      SClientHbRsp rsp = {.status = 0, .connKey = pHbReq->connKey, .bodyLen = 0, .body = NULL};
-        .status = 0,
-        .connKey = pHbReq->connKey,
-        .bodyLen = 0,
-        .body = NULL
-      };
       taosArrayPush(batchRsp.rsps, &rsp);
     }
   }
   int32_t tlen = tSerializeSClientHbBatchRsp(NULL, &batchRsp);
-  void* buf = rpcMallocCont(tlen);
+  void   *buf = rpcMallocCont(tlen);
-  void* bufCopy = buf;
+  void   *bufCopy = buf;
   tSerializeSClientHbBatchRsp(&bufCopy, &batchRsp);
   pReq->contLen = tlen;
   pReq->pCont = buf;