if not master, authentication shall return NOT_READY, so client can move to next node

src/mnode/src/mgmtShell.c

@@ -375,7 +375,7 @@ static int mgmtShellRetriveAuth(char *user, char *spi, char *encrypt, char *secr
 
   if (!sdbIsMaster()) {
     *secret = 0;
-    return TSDB_CODE_SUCCESS;
+    return TSDB_CODE_NOT_READY;
   }
 
   SUserObj *pUser = mgmtGetUser(user);

src/rpc/src/rpcMain.c

@@ -613,13 +613,15 @@ static SRpcConn *rpcAllocateServerConn(SRpcInfo *pRpc, SRecvInfo *pRecv) {
     pConn->tranId = (uint16_t)(rand() & 0xFFFF);
     pConn->ownId = htonl(pConn->sid);
     pConn->linkUid = pHead->linkUid;
-    if (pRpc->afp && (*pRpc->afp)(pConn->user, &pConn->spi, &pConn->encrypt, pConn->secret, pConn->ckey) < 0) {
-      tWarn("%s %p, user not there", pRpc->label, pConn);
+    if (pRpc->afp) {
+      terrno = (*pRpc->afp)(pConn->user, &pConn->spi, &pConn->encrypt, pConn->secret, pConn->ckey);
+      if (terrno != 0) {
+        tWarn("%s %p, user not there or server not ready", pRpc->label, pConn);
         taosFreeId(pRpc->idPool, sid);   // sid shall be released
-      terrno = TSDB_CODE_INVALID_USER;
         pConn = NULL;
       }
     }
+  }      
 
   if (pConn) {
     if (pRecv->connType == RPC_CONN_UDPS && pRpc->numOfThreads > 1) {
@@ -1334,7 +1336,8 @@ static int rpcCheckAuthentication(SRpcConn *pConn, char *msg, int msgLen) {
   if ( !rpcIsReq(pHead->msgType) ) {
     // for response, if code is auth failure, it shall bypass the auth process
     code = htonl(pHead->code);
-    if (code==TSDB_CODE_INVALID_TIME_STAMP || code==TSDB_CODE_AUTH_FAILURE || code==TSDB_CODE_INVALID_USER) {
+    if (code==TSDB_CODE_INVALID_TIME_STAMP || code==TSDB_CODE_AUTH_FAILURE || 
+        code==TSDB_CODE_INVALID_USER || code == TSDB_CODE_NOT_READY) {
       pHead->msgLen = (int32_t)htonl((uint32_t)pHead->msgLen);
       return 0;
     }