recover handler if panic

server/grpc/grpc.go

@@ -338,6 +338,11 @@ func (g *grpcServer) processRequest(stream grpc.ServerStream, service *service,
 
 		// define the handler func
 		fn := func(ctx context.Context, req server.Request, rsp interface{}) error {
+			defer func() {
+				if r := recover(); r != nil {
+					log.Logf("handler %s panic recovered, err: %s", mtype.method.Name, r)
+				}
+			}()
 			returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(argv.Interface()), reflect.ValueOf(rsp)})
 
 			// The return value for the method is an error.