[jira] [Created] (AMBARI-16949) Metrics Collector API shows NPE if we use wildcard (%25 for '%') for metric name

["Jungtaek Lim (JIRA)" <ji...@apache.org>]

Jungtaek Lim created AMBARI-16949:
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             Summary: 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


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}



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