fix coverity scan

src/rpc/src/rpcMain.c

@@ -631,6 +631,7 @@ static void rpcReleaseConn(SRpcConn *pConn) {
     // if there is an outgoing message, free it
     if (pConn->outType && pConn->pReqMsg) {
       SRpcReqContext *pContext = pConn->pContext;
+      if (pContext) {
         if (pContext->pRsp) {   
         // for synchronous API, post semaphore to unblock app
           pContext->pRsp->code = TSDB_CODE_RPC_APP_ERROR;
@@ -640,6 +641,9 @@ static void rpcReleaseConn(SRpcConn *pConn) {
         }
         pContext->pConn = NULL; 
         taosRemoveRef(tsRpcRefId, pContext->rid);
+      } else {
+        assert(0); 
+      }
     }
   }
 
@@ -1083,7 +1087,11 @@ static void *rpcProcessMsgFromPeer(SRecvInfo *pRecv) {
         if (code == TSDB_CODE_RPC_INVALID_TIME_STAMP || code == TSDB_CODE_RPC_AUTH_FAILURE) {
           rpcCloseConn(pConn);
         }
+        if (pHead->msgType + 1 > 1 && pHead->msgType+1 < TSDB_MSG_TYPE_MAX) {
           tDebug("%s %p %p, %s is sent with error code:0x%x", pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType+1], code);
+        } else {
+          tError("%s %p %p, %s is sent with error code:0x%x", pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType], code);
+        }     
       } 
     } else { // msg is passed to app only parsing is ok 
 

src/rpc/src/rpcTcp.c

@@ -242,7 +242,14 @@ static void *taosAcceptTcpConnection(void *arg) {
 
     taosKeepTcpAlive(connFd);
     struct timeval to={1, 0};
-    taosSetSockOpt(connFd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
+    int32_t ret = taosSetSockOpt(connFd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
+    if (ret != 0) {
+      taosCloseSocket(connFd);
+      tError("%s failed to set recv timeout fd(%s)for connection from:%s:%hu", pServerObj->label, strerror(errno),
+             taosInetNtoa(caddr.sin_addr), htons(caddr.sin_port));
+      continue;
+    }
+    
 
     // pick up the thread to handle this connection
     pThreadObj = pServerObj->pThreadObj[threadId];

src/rpc/test/rclient.c

@@ -188,7 +188,8 @@ int main(int argc, char *argv[]) {
   tInfo("it takes %.3f mseconds to send %d requests to server", usedTime, numOfReqs*appThreads);
   tInfo("Performance: %.3f requests per second, msgSize:%d bytes", 1000.0*numOfReqs*appThreads/usedTime, msgSize);
 
-  getchar();
+  int ch = getchar();
+  UNUSED(ch); 
 
   taosCloseLog();