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https://issues.apache.org/jira/browse/YARN-3143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14311660#comment-14311660
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Hudson commented on YARN-3143:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #99 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/99/])
> RM Apps REST API can return NPE or entries missing id and other fields
> ----------------------------------------------------------------------
>
> Key: YARN-3143
> URL: https://issues.apache.org/jira/browse/YARN-3143
> Project: Hadoop YARN
> Issue Type: Bug
> Components: webapp
> Affects Versions: 2.5.2
> Reporter: Kendall Thrapp
> Assignee: Jason Lowe
> Fix For: 2.7.0
>
> Attachments: YARN-3143.001.patch
>
>
> I'm seeing intermittent null pointer exceptions being returned by
> the YARN Apps REST API.
> For example:
> {code}
> http://{cluster}:{port}/ws/v1/cluster/apps?finalStatus=UNDEFINED
> {code}
> JSON Response was:
> {code}
> {"RemoteException":{"exception":"NullPointerException","javaClassName":"java.lang.NullPointerException"}}
> {code}
> At a glance appears to be only when we query for unfinished apps (i.e.
> finalStatus=UNDEFINED).
> Possibly related, when I do get back a list of apps, sometimes one or more of
> the apps will be missing most of the fields, like id, name, user, etc., and
> the fields that are present all have zero for the value.
> For example:
> {code}
> {"progress":0.0,"clusterId":0,"applicationTags":"","startedTime":0,"finishedTime":0,"elapsedTime":0,"allocatedMB":0,"allocatedVCores":0,"runningContainers":0,"preemptedResourceMB":0,"preemptedResourceVCores":0,"numNonAMContainerPreempted":0,"numAMContainerPreempted":0}
> {code}
> Let me know if there's any other information I can provide to help debug.
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