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https://issues.apache.org/jira/browse/YARN-4430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045339#comment-15045339
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ASF GitHub Bot commented on YARN-4430:
--------------------------------------

GitHub user steveloughran opened a pull request:

    https://github.com/apache/hadoop/pull/61

    YARN-4430 registry security validation can fail when downgrading to 
insecure would work

    This makes the check -> warn, leaving ZK to decide how to handle the problem

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/steveloughran/hadoop 
YARN-913/YARN-4430-trunk-zksecurity

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/hadoop/pull/61.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #61
    
----
commit 9adc8862d13644a4eed084ccc8349b3c9bc65563
Author: Steve Loughran <ste...@apache.org>
Date:   2015-12-07T17:46:21Z

    YARN-4430 registry security validation can fail when downgrading to 
insecure would work

----


> registry security validation can fail when downgrading to insecure would work
> -----------------------------------------------------------------------------
>
>                 Key: YARN-4430
>                 URL: https://issues.apache.org/jira/browse/YARN-4430
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn
>    Affects Versions: 2.7.1
>         Environment: Kerberos, java  7 & 8
>            Reporter: Steve Loughran
>
> The Registry ZK client code does a pre-emptive validation of registry 
> security settings, in the interest of being helpful when things fail.
> But: sometimes it fails fast (see stack trace in SLIDER-993) when it could 
> just warn and continue -because if the registry is only being read, skipping 
> SASL auth works



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