[
https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332706#comment-16332706
]
Daryn Sharp commented on HADOOP-9747:
-------------------------------------
Will post a branch-2 patch if this version is deemed acceptable. As mentioned
before, all "intelligent" studying of the subject is gone. It just tracks
explicitly principal, keytab, ticket cache used during login. Ensures those
parameters are used during relogin. Removes all the synchronization. Ignores
"external" subjects that lack a User principal not created by the UGI.
> 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-trunk-03.patch, HADOOP-9747-trunk.01.patch,
> HADOOP-9747-trunk.02.patch, 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.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
