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From "Tao Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-8575) CapacityScheduler should check node state before committing reserve/allocate proposals
Date Fri, 10 Aug 2018 02:52:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-8575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tao Yang updated YARN-8575:
---------------------------
    Attachment: YARN-8575.002.patch

> CapacityScheduler should check node state before committing reserve/allocate proposals
> --------------------------------------------------------------------------------------
>
>                 Key: YARN-8575
>                 URL: https://issues.apache.org/jira/browse/YARN-8575
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 3.2.0, 3.1.2
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>         Attachments: YARN-8575.001.patch, YARN-8575.002.patch
>
>
> Recently we found a new error as follows: 
> {noformat}
> ERROR org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp:
node to unreserve doesn't exist, nodeid: host1:45454
> {noformat}
> Reproduce this problem:
> (1) Create a reserve proposal for app1 on node1
> (2) node1 is successfully decommissioned and removed from node tracker
> (3) Try to commit this outdated reserve proposal, it will be accepted and applied.
> This error may be occurred after decommissioning some NMs. The application who print
the error log will always have a reserved container on non-exist (decommissioned) NM and the
pending request will never be satisfied.
> To solve this problem, scheduler should check node state in FiCaSchedulerApp#accept to
avoid committing outdated proposals on unusable nodes. 



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