[
https://issues.apache.org/jira/browse/HADOOP-9749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vinod Kumar Vavilapalli updated HADOOP-9749:
--------------------------------------------
Target Version/s: (was: 2.8.0)
Not much going on here for a long time, dropping from 2.8.0.
Not putting any target-version either anymore, let's target this depending on
when there is patch activity.
> Remove synchronization for UGI.getCurrentUser
> ---------------------------------------------
>
> Key: HADOOP-9749
> URL: https://issues.apache.org/jira/browse/HADOOP-9749
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
>
> HADOOP-7854 added synchronization to {{getCurrentUser}} due to
> {{ConcurrentModificationExceptions}}. This degrades NN call handler
> performance.
> The problem was not well understood at the time, but it's caused by a
> collision between relogin and {{getCurrentUser}} due to a bug in
> {{Krb5LoginModule}}. Avoiding the collision will allow removal of the
> synchronization.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
