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From "Dapeng Sun (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (YARN-9198) Corrupted state from a previous version can still cause RM to fail with NPE on FairScheduler
Date Mon, 14 Jan 2019 09:39:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-9198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16741887#comment-16741887
] 

Dapeng Sun edited comment on YARN-9198 at 1/14/19 9:38 AM:
-----------------------------------------------------------

Attached a simple patch to fix it.


was (Author: dapengsun):
Attach a simple patch to fix it.

> Corrupted state from a previous version can still cause RM to fail with NPE on FairScheduler
> --------------------------------------------------------------------------------------------
>
>                 Key: YARN-9198
>                 URL: https://issues.apache.org/jira/browse/YARN-9198
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler, resourcemanager
>    Affects Versions: 3.1.0, 2.8.5
>            Reporter: Dapeng Sun
>            Assignee: Dapeng Sun
>            Priority: Major
>         Attachments: YARN-9198.001.patch
>
>
> Previously, RM may fail with NPE due to YARN-4347,YARN-4000. After these fixes, FairScheduler
still has the same potential issue.
>  
> 201x-xx-xx xx:xx:xx,xxx ERROR resourcemanager.ResourceManager (ResourceManager.java:serviceStart)
- Failed to load/recover state
> java.lang.NullPointerException
>         at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.addApplicationAttempt(FairScheduler.java)



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