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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (YARN-6827) [ATS1/1.5] NPE exception while publishing recovering applications into ATS during RM restart.
Date Mon, 05 Mar 2018 10:41:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-6827?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rohith Sharma K S reassigned YARN-6827:
---------------------------------------

    Assignee:     (was: Rohith Sharma K S)

> [ATS1/1.5] NPE exception while publishing recovering applications into ATS during RM
restart.
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-6827
>                 URL: https://issues.apache.org/jira/browse/YARN-6827
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Rohith Sharma K S
>            Priority: Major
>
> While recovering application, it is observed that NPE exception is thrown as below.
> {noformat}
> 017-07-13 14:08:12,476 ERROR org.apache.hadoop.yarn.server.resourcemanager.metrics.TimelineServiceV1Publisher:
Error when publishing entity [YARN_APPLICATION,application_1499929227397_0001]
> java.lang.NullPointerException
> 	at org.apache.hadoop.yarn.client.api.impl.TimelineClientImpl.putEntities(TimelineClientImpl.java:178)
> 	at org.apache.hadoop.yarn.server.resourcemanager.metrics.TimelineServiceV1Publisher.putEntity(TimelineServiceV1Publisher.java:368)
> {noformat}
> This is because in RM service start, active services are started first in Non HA case
and later ATSv1 services are started. In HA case, tansitionToActive event has come first before
ATS service are started.
> This gives sufficient time to active services recover the applications which tries to
publish into ATSv1 while recovering. Since ATS services are not started yet, it throws NPE.



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