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From "Masatake Iwasaki (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5748) Backport YARN-5718 to branch-2
Date Tue, 04 Apr 2017 07:46:41 GMT

     [ https://issues.apache.org/jira/browse/YARN-5748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Masatake Iwasaki updated YARN-5748:
-----------------------------------
    Attachment: YARN-5748-branch-2.001.patch

I saw this issue recently. I attached a patch for branch-2 going with option #2. The 001 adds
on/off switch to retry policy while keeping default behaviour. It also adds regression test
using FileSystemRMStateStore. I think it is ok to change the default value from true to false
here or later if we have confidence.

> Backport YARN-5718 to branch-2
> ------------------------------
>
>                 Key: YARN-5748
>                 URL: https://issues.apache.org/jira/browse/YARN-5748
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: YARN-5748-branch-2.001.patch
>
>
> In YARN-5718, we have identify several unnecessary config to over-write HDFS client behavior
in several components of YARN (FSRMStore, TimelineClient, NodeLabelStore, etc.) which cause
job failure in some cases (NN HA, etc.) - that's definitely belongs to bug. In YARN-5718,
we proposed to remove the config as it shouldn't be supposed to work, which get committed
to trunk already as alpha stage has more flexibility for incompatible changes. In branch-2,
we want to play a bit more safe and get more discussion. 
> Obviously, there are several options here:
> 1. Don't fix anything, let bug exist
> 2. Fix the bug, but keep the configuration, or mark it deprecated and add some explanation
to say this configuration is not supposed to work any more.
> 3. Exactly like YARN-5718, fix the bug and remove the unnecessary configuration.
> This ticket is filed for more discussion.



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