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https://issues.apache.org/jira/browse/HDFS-9577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15065145#comment-15065145
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Kai Zheng commented on HDFS-9577:
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Thanks [~mingma] for the confirm! Yes I will resolve this once HDFS-8905 is in.
> ReadStatistics not thread safe when hedged read is enabled
> ----------------------------------------------------------
>
> Key: HDFS-9577
> URL: https://issues.apache.org/jira/browse/HDFS-9577
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Ming Ma
>
> When hedged read is enabled, the actual read will be called on the hedged
> thread pool which will also call {{updateReadStatistics}}. However, it seems
> {{ReadStatistics}} doesn't use atomic types for its metrics. [~xieliang007],
> can you please confirm?
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