feature(rpc): add retry

source/libs/transport/src/transCli.c

@@ -887,8 +887,19 @@ int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
 
   STransConnCtx* pCtx = pMsg->ctx;
   SEpSet*        pEpSet = &pCtx->epSet;
-  if (pTransInst->retry != NULL && pTransInst->retry(pResp->code) && pCtx->retryCount <= TRANS_RETRY_COUNT_LIMIT) {
+
+  tmsg_t msgType = pCtx->msgType;
+  if ((pTransInst->retry != NULL && (pTransInst->retry(pResp->code))) ||
+      ((pResp->code != 0) && msgType == TDMT_MND_CONNECT)) {
     pCtx->retryCount += 1;
+    pMsg->st = taosGetTimestampUs();
+    if (msgType == TDMT_MND_CONNECT) {
+      if (pCtx->retryCount < pEpSet->numOfEps) {
+        pEpSet->inUse = (++pEpSet->inUse) % pEpSet->numOfEps;
+        cliHandleReq(pMsg, pThrd);
+        return -1;
+      }
+    } else if (pCtx->retryCount < TRANS_RETRY_COUNT_LIMIT) {
       if (pResp->contLen == 0) {
         pEpSet->inUse = (pEpSet->inUse++) % pEpSet->numOfEps;
       } else {
@@ -900,6 +911,7 @@ int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
       cliHandleReq(pMsg, pThrd);
       return -1;
     }
+  }
 
   if (pCtx->pSem != NULL) {
     tTrace("%s cli conn %p handle resp", pTransInst->label, pConn);