[jira] [Commented] (HDFS-2186) DN volume failures on startup are not counted

["Eli Collins (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-2186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083899#comment-13083899 ] 

Eli Collins commented on HDFS-2186:
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+1 overall.  

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit warnings.

    +1 system test framework.  The patch passed system test framework compile.
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> DN volume failures on startup are not counted
> ---------------------------------------------
>
>                 Key: HDFS-2186
>                 URL: https://issues.apache.org/jira/browse/HDFS-2186
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 0.23.0
>
>         Attachments: hdfs-2186-1.patch
>
>
> Volume failures detected on startup are not currently counted/reported as such. Eg if you have configured 4 volumes, 2 tolerated failures, and you start a DN with two failed volumes it will come up and report (to the NN) no failed volumes. The DN will still be able to tolerate 2 additional volume failures (ie it's OK with no valid volumes remaining). The intent of the volume failure toleration config value is that if more than this # of volumes of the total set of configured volumes have failed the DN should shutdown, therefore volume failures detected on startup should count against this quota. 

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