hadoop-yarn-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-4105) Capacity Scheduler headroom for DRF is wrong
Date Fri, 06 Jan 2017 01:48:59 GMT

     [ https://issues.apache.org/jira/browse/YARN-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Junping Du updated YARN-4105:
-----------------------------
    Fix Version/s: 2.8.0

> Capacity Scheduler headroom for DRF is wrong
> --------------------------------------------
>
>                 Key: YARN-4105
>                 URL: https://issues.apache.org/jira/browse/YARN-4105
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.6.0
>            Reporter: Chang Li
>            Assignee: Chang Li
>             Fix For: 2.8.0, 2.7.2, 3.0.0-alpha1
>
>         Attachments: YARN-4105.2.patch, YARN-4105.3.patch, YARN-4105.4.patch, YARN-4105.patch
>
>
> relate to the problem discussed in YARN-1857. But the min method is flawed when we are
using DRC. Have run into a real scenario in production where queueCapacity: <memory:1056256,
vCores:3750>, qconsumed: <memory:1054720, vCores:361>, consumed: <memory:125952,
vCores:170> limit: <memory:214016, vCores:755>.  headRoom calculation returns 88064
where there is only 1536 left in the queue because DRC effectively compare by vcores. It then
caused deadlock because RMcontainer allocator thought there is still space for mapper and
won't preempt a reducer in a full queue to schedule a mapper. Propose fix with componentwiseMin.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-issues-help@hadoop.apache.org


Mime
View raw message