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From "Xuan Gong (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 Fri, 14 Oct 2016 01:38:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573792#comment-15573792
] 

Xuan Gong commented on YARN-5718:
---------------------------------

+1 LGTM.

[~djp]
But I am worried about the back-incompatibility issue. Could you file a separate ticket to
have a discussion on branch-2 and branch-2.8 for this ticket, please ?

At the mean time, I will commit the patch into trunk.

> 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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