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https://issues.apache.org/jira/browse/TEZ-2421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535229#comment-14535229
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Bikas Saha commented on TEZ-2421:
---------------------------------

At this point, I will need to investigate the recovery logic further for a 
workaround/fix. Since this issue does not always happen, I suggest removing it 
as a blocker for 0.7.0 to enable the new API's to be consumed by other 
projects. We can follow up immediately with 0.7.1 with a specific fix for this 
issue.

> Deadlock in AM because attempt and vertex locking each other out
> ----------------------------------------------------------------
>
>                 Key: TEZ-2421
>                 URL: https://issues.apache.org/jira/browse/TEZ-2421
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>            Priority: Blocker
>         Attachments: TEZ-2421.1.patch, TEZ-2421.2.patch, TEZ-2421.3.patch
>
>
> Ideally locks should be taken one way - either going down or up. Preferably 
> not going up because most such data can be passed in during object 
> construction.



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