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Review request for Ambari, Aravindan Vijayan, Dmytro Sen, and Sumit Mohanty. Bugs: AMBARI-17726 https://issues.apache.org/jira/browse/AMBARI-17726 Repository: ambari Description ------- java.lang.ArrayIndexOutOfBoundsException: -1 at java.util.ArrayList.elementData(ArrayList.java:418) at java.util.ArrayList.get(ArrayList.java:431) at org.apache.hadoop.metrics2.sink.timeline.availability.MetricSinkWriteShardHostnameHashingStrategy.findCollectorShard(MetricSinkWriteShardHostnameHashingStrategy.java:40) at org.apache.hadoop.metrics2.sink.timeline.AbstractTimelineMetricsSink$1.get(AbstractTimelineMetricsSink.java:371) at Diffs ----- ambari-metrics/ambari-metrics-common/src/main/java/org/apache/hadoop/metrics2/sink/timeline/AbstractTimelineMetricsSink.java f0cea7a ambari-metrics/ambari-metrics-common/src/main/java/org/apache/hadoop/metrics2/sink/timeline/availability/MetricSinkWriteShardHostnameHashingStrategy.java 1c89884 ambari-metrics/ambari-metrics-common/src/test/java/org/apache/hadoop/metrics2/sink/timeline/availability/ShardingStrategyTest.java c6041db ambari-metrics/ambari-metrics-timelineservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/metrics/timeline/availability/MetricCollectorHAController.java 84e4153 Diff: https://reviews.apache.org/r/50059/diff/ Testing ------- Unit test passed. Thanks, Sid Wagle