fix: add return when receive unexpected error

Signed-off-by: ningmingxiao <ning.mingxiao@zte.com.cn>

Author: ningmingxiao

server.go

@@ -551,14 +551,13 @@ func (c *serverConn) run(sctx context.Context) {
 			// TODO(stevvooe): Not wildly clear what we should do in this
 			// branch. Basically, it means that we are no longer receiving
 			// requests due to a terminal error.
-			recvErr = nil // connection is now "closing"
 			if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) || errors.Is(err, syscall.ECONNRESET) {
 				// The client went away and we should stop processing
 				// requests, so that the client connection is closed
 				return
 			}
 			log.G(ctx).WithError(err).Error("error receiving message")
-			// else, initiate shutdown
+			return
 		case <-shutdown:
 			return
 		}