Chengbing Liu created YARN-3160:

             Summary: Non-atomic operation on nodeUpdateQueue in RMNodeImpl
                 Key: YARN-3160
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.7.0
            Reporter: Chengbing Liu
            Assignee: Chengbing Liu

while(nodeUpdateQueue.peek() != null){
The above code brings potential risk of adding null value to 
{{latestContainerInfoList}}. Since {{ConcurrentLinkedQueue}} implements a 
wait-free algorithm, we can directly poll the queue, before checking whether 
the value is null.

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