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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5718) TimelineClient (and other places in YARN) shouldn't over-write HDFS client retry settings which could cause unexpected behavior
Date Wed, 12 Oct 2016 18:53:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15569568#comment-15569568
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Junping Du commented on YARN-5718:
----------------------------------

Thanks Vrushali for quick comments. I think compile error is a bit misleading but indeed an
issue need to fix in TestFSRMStateStore (due to a stupid mistake in generating v2 patch).
v2.1 should fix the issue.

> TimelineClient (and other places in YARN) shouldn't over-write HDFS client retry settings
which could cause unexpected behavior
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5718
>                 URL: https://issues.apache.org/jira/browse/YARN-5718
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, timelineclient
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: YARN-5718-v2.1.patch, YARN-5718-v2.patch, YARN-5718.patch
>
>
> In one HA cluster, after NN failed over, we noticed that job is getting failed as TimelineClient
failed to retry connection to proper NN. This is because we are overwrite hdfs client settings
that hard code retry policy to be enabled that conflict NN failed-over case - hdfs client
should fail fast so can retry on another NN.
> We shouldn't assume any retry policy for hdfs client at all places in YARN. This should
keep consistent with HDFS settings that has different retry polices in different deployment
case. Thus, we should clean up these hard code settings in YARN, include: FileSystemTimelineWriter,
FileSystemRMStateStore and FileSystemNodeLabelsStore.



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