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https://issues.apache.org/jira/browse/AMBARI-16949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim updated AMBARI-16949:
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Attachment: (was: AMBARI-16949-trunk.patch)
> Metrics Collector API shows NPE if we use wildcard (%25 for '%') for metric
> name
> --------------------------------------------------------------------------------
>
> Key: AMBARI-16949
> URL: https://issues.apache.org/jira/browse/AMBARI-16949
> Project: Ambari
> Issue Type: Bug
> Components: ambari-metrics
> Affects Versions: 2.4.0
> Reporter: Jungtaek Lim
> Attachments: AMBARI-16949-trunk-v1.patch
>
>
> When we request '/ws/v1/timeline/metrics' with metric name which contains %25
> (escaped '%'), response for the API is json describing there's NPE.
> And NPE is logged for ambari-metrics-collector log file.
> {code}
> 2016-05-30 09:15:05,061 WARN
> org.apache.hadoop.yarn.webapp.GenericExceptionHandler: INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.appendAggregateMetricFromResultSet(PhoenixHBaseAccessor.java:810)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.PhoenixHBaseAccessor.getAggregateMetricRecords(PhoenixHBaseAccessor.java:772)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.HBaseTimelineMetricStore.getTimelineMetrics(HBaseTimelineMetricStore.java:178)
> at
> org.apache.hadoop.yarn.server.applicationhistoryservice.webapp.TimelineWebServices.getTimelineMetrics(TimelineWebServices.java:372)
> at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
> {code}
> Reason of NPE:
> Metrics are properly fetched with wildcard. But when applying functions to
> result set, actual metric name is not exist from map of metric name to list
> of function.
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