Chengbing Liu created YARN-3160:
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Summary: Non-atomic operation on nodeUpdateQueue in RMNodeImpl
Key: YARN-3160
URL: https://issues.apache.org/jira/browse/YARN-3160
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.7.0
Reporter: Chengbing Liu
Assignee: Chengbing Liu
{code:title=Bar.java|borderStyle=solid}
while(nodeUpdateQueue.peek() != null){
latestContainerInfoList.add(nodeUpdateQueue.poll());
}
{code}
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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