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https://issues.apache.org/jira/browse/YARN-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15438467#comment-15438467
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Rohith Sharma K S commented on YARN-4220:
-----------------------------------------
In hadoop alpha-1, querying for system entities such as YARN_APPLICATION and
YARN_FLOW_RUN throws NPE exception.
GET
http://localhost:8188/ws/v2/timeline/apps/application_1471931266232_0024/entities
{noformat}
Caused by: java.lang.NullPointerException: userId shouldn't be null
at
com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
at
org.apache.hadoop.yarn.server.timelineservice.storage.reader.ApplicationEntityReader.validateParams(ApplicationEntityReader.java:336)
at
org.apache.hadoop.yarn.server.timelineservice.storage.reader.TimelineEntityReader.readEntities(TimelineEntityReader.java:249)
at
org.apache.hadoop.yarn.server.timelineservice.storage.HBaseTimelineReaderImpl.getEntities(HBaseTimelineReaderImpl.java:86)
at
org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderManager.getEntities(TimelineReaderManager.java:141)
at
org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderWebServices.getEntities(TimelineReaderWebServices.java:562
{noformat}
{noformat}
Caused by: java.lang.NullPointerException: userId shouldn't be null
at
com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)
at
org.apache.hadoop.yarn.server.timelineservice.storage.reader.FlowRunEntityReader.validateParams(FlowRunEntityReader.java:89)
at
org.apache.hadoop.yarn.server.timelineservice.storage.reader.TimelineEntityReader.readEntities(TimelineEntityReader.java:249)
at
org.apache.hadoop.yarn.server.timelineservice.storage.HBaseTimelineReaderImpl.getEntities(HBaseTimelineReaderImpl.java:86)
at
org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderManager.getEntities(TimelineReaderManager.java:141)
at
org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderWebServices.getEntities(TimelineReaderWebServices.java:562)
{noformat}
> [Storage implementation] Support getEntities with only Application id but no
> flow and flow run ID
> -------------------------------------------------------------------------------------------------
>
> Key: YARN-4220
> URL: https://issues.apache.org/jira/browse/YARN-4220
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Li Lu
> Assignee: Li Lu
> Priority: Minor
> Labels: YARN-5355
>
> Currently we're enforcing flow and flowrun id to be non-null values on
> {{getEntities}}. We can actually query the appToFlow table to figure out an
> application's flow id and flowrun id if they're missing. This will simplify
> normal queries.
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