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https://issues.apache.org/jira/browse/HADOOP-9504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655339#comment-13655339
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Matt Foley commented on HADOOP-9504:
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I agree. I propose to put it in 1.2.1 in about 3 weeks, if that is okay with
everyone.
> MetricsDynamicMBeanBase has concurrency issues in createMBeanInfo
> -----------------------------------------------------------------
>
> Key: HADOOP-9504
> URL: https://issues.apache.org/jira/browse/HADOOP-9504
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Affects Versions: 3.0.0, 2.0.3-alpha
> Reporter: Liang Xie
> Assignee: Liang Xie
> Priority: Critical
> Fix For: 2.0.5-beta, 0.23.8
>
> Attachments: HADOOP-9504-branch-1.txt, HADOOP-9504.txt,
> HADOOP-9504-v2.txt
>
>
> Please see HBASE-8416 for detail information.
> we need to take care of the synchronization for HashMap put(), otherwise it
> may lead to spin loop.
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