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https://issues.apache.org/jira/browse/HADOOP-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Bowen updated HADOOP-1112:
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Attachment: 1112.patch
This is a small, safe fix. Not sure if it fixes an observed NPE.
> Race condition in Hadoop metrics
> --------------------------------
>
> Key: HADOOP-1112
> URL: https://issues.apache.org/jira/browse/HADOOP-1112
> Project: Hadoop
> Issue Type: Bug
> Reporter: David Bowen
> Attachments: 1112.patch
>
>
> AbstractMetricsContext has non-synchronized accesses to the HashMap
> bufferedData.
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