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https://issues.apache.org/jira/browse/HADOOP-9980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13779686#comment-13779686
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Chris Nauroth commented on HADOOP-9980:
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Yes, that makes sense. I think this would move to an HDFS issue too, because
the patch would only touch files in HDFS. Thanks, Junping.
> LightWeightGSet's modification field should be volatile so that detect
> changes by other thread in iteration.
> ------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-9980
> URL: https://issues.apache.org/jira/browse/HADOOP-9980
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Reporter: Junping Du
> Assignee: Junping Du
> Fix For: 2.3.0
>
> Attachments: HADOOP-9980.patch
>
>
> LightWeightGSet should have a volatile modification field (like:
> LightWeightHashSet or LightWeightLinkedSet) that is used to detect updates
> while iterating so they can throw a ConcurrentModificationException.
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