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https://issues.apache.org/jira/browse/HDFS-8694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Junping Du updated HDFS-8694:
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Target Version/s: (was: 2.8.0)
> Expose the stats of IOErrors on each FsVolume through JMX
> ---------------------------------------------------------
>
> Key: HDFS-8694
> URL: https://issues.apache.org/jira/browse/HDFS-8694
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Attachments: HDFS-8694.000.patch, HDFS-8694.001.patch
>
>
> Currently, once DataNode hits an {{IOError}} when writing / reading block
> files, it starts a background {{DiskChecker.checkDirs()}} thread. But if this
> thread successfully finishes, DN does not record this {{IOError}}.
> We need one measurement to count all {{IOErrors}} for each volume.
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