Github user zhangminglei commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5478#discussion_r168166947
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/Execution.java
 ---
    @@ -698,7 +707,7 @@ else if (numConsumers == 0) {
                                        executor);
     
                                // double check to resolve race conditions
    -                           if(consumerVertex.getExecutionState() == 
RUNNING){
    +                           if (consumerVertex.getExecutionState() == 
RUNNING){
                                        consumerVertex.sendPartitionInfos();
    --- End diff --
    
    It seems missing a space after ```if``` statement.


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