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From "Yufei Gu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-6175) Negative vcore for resource needed to preempt
Date Sat, 11 Feb 2017 00:45:41 GMT

     [ https://issues.apache.org/jira/browse/YARN-6175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yufei Gu updated YARN-6175:
---------------------------
    Description: 
Both old preemption code (2.8 and before) and new preemption code could have negative vcores
while calculating resources needed to preempt.

For old preemption, you can find following messages in RM logs:
{code}
Should preempt <memory:2048, vCores:-2> 
{code}
The related code is in method {{resourceDeficit()}}. 

For new preemption code, there are no messages in RM logs, the related code is in method {{fairShareStarvation()}}.


The negative value isn't only a display issue, but also may cause missing necessary preemption.


  was:
Both old preemption code (2.8 and before) and new preemption code could have negative vcores
while calculating resources needed to preempt.

For old preemption code would has these message:
{code}
Should preempt <memory:2048, vCores:-2>
{code}
The related code is in method {{resourceDeficit()}}. 

For new preemption code, the related code is in method {{fairShareStarvation()}}. 

The negative value isn't only a display issue, but also may cause missing necessary preemption.



> Negative vcore for resource needed to preempt
> ---------------------------------------------
>
>                 Key: YARN-6175
>                 URL: https://issues.apache.org/jira/browse/YARN-6175
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.8.0, 3.0.0-alpha2
>            Reporter: Yufei Gu
>            Assignee: Yufei Gu
>
> Both old preemption code (2.8 and before) and new preemption code could have negative
vcores while calculating resources needed to preempt.
> For old preemption, you can find following messages in RM logs:
> {code}
> Should preempt <memory:2048, vCores:-2> 
> {code}
> The related code is in method {{resourceDeficit()}}. 
> For new preemption code, there are no messages in RM logs, the related code is in method
{{fairShareStarvation()}}. 
> The negative value isn't only a display issue, but also may cause missing necessary preemption.




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