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Date: Fri, 10 Nov 2017 19:53:00 +0000 (UTC)
From: "Bharat Viswanadham (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12658567.1374169075000.209550.1510343580502@Atlassian.JIRA>
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Subject: [jira] [Comment Edited] (HADOOP-9747) Reduce unnecessary UGI
 synchronization
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archived-at: Fri, 10 Nov 2017 19:53:05 -0000


    [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16246681#comment-16246681 ] 

Bharat Viswanadham edited comment on HADOOP-9747 at 11/10/17 7:52 PM:
----------------------------------------------------------------------

Hi [~daryn]
Thank You for providing patch.
One comment from me, this patch removed the flag HADOOP_TREAT_SUBJECT_EXTERNAL_KEY.
So, this configuration also need to be removed from the CommonConfigurations.java and also from core-default.xml

And also could you rebase your patch, as this is not cleanly applying to trunk.


was (Author: bharatviswa):
Hi [~daryn]
Thank You for providing patch.
One comment from me, is this patch removed the flag HADOOP_TREAT_SUBJECT_EXTERNAL_KEY.
So, this configuration need to be removed from the CommonConfigurations.java and also from core-default.xml

And also could you rebase your patch, as this is not cleanly applying to trunk.

> Reduce unnecessary UGI synchronization
> --------------------------------------
>
>                 Key: HADOOP-9747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9747
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HADOOP-9747.2.branch-2.patch, HADOOP-9747.2.trunk.patch, HADOOP-9747.branch-2.patch, HADOOP-9747.trunk.patch
>
>
> Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI.


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