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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8694) Expose the stats of IOErrors on each FsVolume through JMX
Date Tue, 30 Jun 2015 00:01:06 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8694?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lei (Eddy) Xu updated HDFS-8694:
--------------------------------
    Status: Patch Available  (was: Open)

> 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, HDFS
>    Affects Versions: 2.7.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HDFS-8694.000.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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