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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Moved] (HDFS-8694) Expose the stats of IOErrors on each FsVolume through JMX
Date Mon, 29 Jun 2015 23:42:05 GMT

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

Lei (Eddy) Xu moved HADOOP-12148 to HDFS-8694:
----------------------------------------------

    Affects Version/s:     (was: 2.7.0)
                       2.7.0
     Target Version/s: 3.0.0, 2.8.0  (was: 3.0.0, 2.8.0)
          Component/s:     (was: metrics)
                       HDFS
                       datanode
                  Key: HDFS-8694  (was: HADOOP-12148)
              Project: Hadoop HDFS  (was: Hadoop Common)

> 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
>
> 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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