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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5154) 4-way deadlock in FairShare scheduler
Date Mon, 02 Feb 2009 07:47:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod K V updated HADOOP-5154:
------------------------------

    Attachment: FairSchedulerDeadLock.txt

Attached thread dump.

Summary:
JT UI (jobtracker.jsp)
 - Waiting for lock on JobTracker object

FairScheduler.assignTasks
 - Locked JobTracker object
 - Waiting for lock on FairScheduler object

FairScheduler update thread
 - Locked FairScheduler object
 - Waiting for lock on PoolManager object

FairScheduler.update (from scheduler UI)
 - Locked PoolManager object
 - Waiting for lock on FairScheduler object

> 4-way deadlock in FairShare scheduler
> -------------------------------------
>
>                 Key: HADOOP-5154
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5154
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/fair-share
>            Reporter: Vinod K V
>         Attachments: FairSchedulerDeadLock.txt
>
>
> This happened while trying to change the priority of a job from the scheduler servlet.

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