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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2850) TaskTracker disk failure handling (MR-2413) has no test coverage
Date Thu, 22 Sep 2011 22:57:26 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112998#comment-13112998
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Eli Collins commented on MAPREDUCE-2850:
----------------------------------------

Took a quick look:

In prepareDirToFail it says the file is set to perms "000" but File#createNewFile uses the
default perms (eg 644 with umask 022), so it should still be accessible right?

If you want not always have waitForDiskHealthCheck wait for 10s at a time seems like you can
lower the DISK_HEALTH_CHECK_INTERVAL to eg 1s.

Would also be good to test startup with a failed directory. Feel free to punt this to MAPREDUCE-2921.

Otherwise looks good.

> TaskTracker disk failure handling (MR-2413) has no test coverage
> ----------------------------------------------------------------
>
>                 Key: MAPREDUCE-2850
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2850
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: tasktracker
>    Affects Versions: 0.20.204.0
>            Reporter: Eli Collins
>            Assignee: Ravi Gummadi
>             Fix For: 0.20.205.0
>
>         Attachments: MR2850.v0.patch
>
>
> MR-2413 doesn't have any test coverage that eg tests that the TT can survive disk failure.

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