add strem attr on netoutput node for train step ends with no-op

ge/graph/passes/net_output_pass.cc

@@ -556,6 +556,11 @@ Status NetOutputPass::AddNetOutputNodeToGraph(const ge::ComputeGraphPtr &graph,
     output_node = graph->AddNode(net_output_desc);
     GE_CHK_STATUS_RET(AddCtrlEdgesBetweenLeafAndNetOutput(graph, output_node),
                       "add ctrl edge between leaf and netoutput failed");
+    GE_IF_BOOL_EXEC(!ge::AttrUtils::SetInt(output_node->GetOpDesc(), ATTR_NAME_TRUE_BRANCH_STREAM, 0),
+                    REPORT_CALL_ERROR("E19999", "Set Attr:%s to op:%s(%s) failed", ATTR_NAME_TRUE_BRANCH_STREAM.c_str(),
+                                      output_node->GetName().c_str(), output_node->GetType().c_str());
+                    GELOGE(INTERNAL_ERROR, "set ATTR_NAME_TRUE_BRANCH_STREAM failed");
+                    return INTERNAL_ERROR);
     return SUCCESS;
   }
   GELOGI("[NETOUTPUT PASS] Output node size:%lu.", output_nodes_info.size());