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https://issues.apache.org/jira/browse/AMBARI-19320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aravindan Vijayan reopened AMBARI-19320:
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Reopening to support metricName expressions like
dfs.NNTopUserOpCounts.windowMs=300000.op=__%.user=%.count
> Additional query support for HDFS TopN metrics
> ----------------------------------------------
>
> Key: AMBARI-19320
> URL: https://issues.apache.org/jira/browse/AMBARI-19320
> Project: Ambari
> Issue Type: Task
> Components: ambari-metrics
> Affects Versions: 2.5.0
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Fix For: 2.5.0
>
> Attachments: AMBARI-19320.patch
>
>
> We need to support the following query to render required graphs in Grafana
> for HDFS- TopN dashboard.
> * dfs.NNTopUserOpCounts.windowMs=150000.op=*.user=%
> Currently, a Null Pointer Exception is thrown for the query.
> {code}
> 2016-12-28 22:30:24,614 WARN
> org.apache.hadoop.yarn.webapp.GenericExceptionHandler: INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.appendMetricFromResultSet(PhoenixHBaseAccessor.java:867)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.getMetricRecords(PhoenixHBaseAccessor.java:782)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.HBaseTimelineMetricStore.getTimelineMetrics(HBaseTimelineMetricStore.java:255)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.webapp.TimelineWebServices.getTimelineMetrics(TimelineWebServices.java:359)
> at sun.reflect.GeneratedMethodAccessor32.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> {code}
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