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Posted to yarn-issues@hadoop.apache.org by "Varun Saxena (JIRA)" <ji...@apache.org> on 2015/09/29 10:46:05 UTC
[jira] [Updated] (YARN-4210) HBase reader throws NPE if Get returns
no rows
[ https://issues.apache.org/jira/browse/YARN-4210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Varun Saxena updated YARN-4210:
-------------------------------
Summary: HBase reader throws NPE if Get returns no rows (was: HBase reader throws NPE if GET returns no rows)
> HBase reader throws NPE if Get returns no rows
> ----------------------------------------------
>
> Key: YARN-4210
> URL: https://issues.apache.org/jira/browse/YARN-4210
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Affects Versions: YARN-2928
> Reporter: Varun Saxena
> Assignee: Varun Saxena
>
> If HBase Get does not fetch any rows for the query, we still try to parse the result and read fields. This leads to NPE while reading metrics. We should not attempt to read anything if no row is returned i.e. result is empty
> {noformat}
> 2015-09-29 20:22:32,027 ERROR [95336304@qtp-1814206058-0] reader.TimelineReaderWebServices (TimelineReaderWebServices.java:handleException(199)) - Error while processing REST request
> java.lang.NullPointerException
> at org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnHelper.readResultsWithTimestamps(ColumnHelper.java:176)
> at org.apache.hadoop.yarn.server.timelineservice.storage.flow.FlowRunColumnPrefix.readResultsWithTimestamps(FlowRunColumnPrefix.java:182)
> at org.apache.hadoop.yarn.server.timelineservice.storage.TimelineEntityReader.readMetrics(TimelineEntityReader.java:212)
> at org.apache.hadoop.yarn.server.timelineservice.storage.FlowRunEntityReader.parseEntity(FlowRunEntityReader.java:136)
> at org.apache.hadoop.yarn.server.timelineservice.storage.TimelineEntityReader.readEntity(TimelineEntityReader.java:137)
> at org.apache.hadoop.yarn.server.timelineservice.storage.HBaseTimelineReaderImpl.getEntity(HBaseTimelineReaderImpl.java:72)
> at org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderManager.getEntity(TimelineReaderManager.java:93)
> at org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderWebServices.getFlowRun(TimelineReaderWebServices.java:403)
> {noformat}
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