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https://issues.apache.org/jira/browse/YARN-3160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14316324#comment-14316324
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Hudson commented on YARN-3160:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #102 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/102/])
YARN-3160. Fix non-atomic operation on nodeUpdateQueue in RMNodeImpl.
(Contributed by Chengbing Liu) (junping_du: rev
c541a374d88ffed6ee71b0e5d556939ccd2c5159)
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmnode/RMNodeImpl.java
* hadoop-yarn-project/CHANGES.txt
> 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
> Fix For: 2.7.0
>
> Attachments: YARN-3160.2.patch, YARN-3160.patch
>
>
> {code:title=RMNodeImpl.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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