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Review request for Ambari, Dmytro Sen, Sumit Mohanty, and Sid Wagle. Bugs: AMBARI-18487 https://issues.apache.org/jira/browse/AMBARI-18487 Repository: ambari Description ------- 1. Change metric monitor sharding strategy to hostname based. 2. Fix issues in AbstractTimelineMetricSink 3. Change Sink Zk retry policy to BoundedExponentialBackoffRetry. Diffs ----- ambari-metrics/ambari-metrics-common/src/main/java/org/apache/hadoop/metrics2/sink/timeline/AbstractTimelineMetricsSink.java 426eb42 ambari-metrics/ambari-metrics-common/src/main/java/org/apache/hadoop/metrics2/sink/timeline/availability/MetricCollectorHAHelper.java 4d0ec14 ambari-metrics/ambari-metrics-hadoop-sink/src/main/java/org/apache/hadoop/metrics2/sink/timeline/HadoopTimelineMetricsSink.java b720ba9 ambari-metrics/ambari-metrics-hadoop-sink/src/test/java/org/apache/hadoop/metrics2/sink/timeline/HadoopTimelineMetricsSinkTest.java f44ca35 ambari-metrics/ambari-metrics-host-monitoring/src/main/python/core/blacklisted_set.py 3982c4e ambari-metrics/ambari-metrics-host-monitoring/src/main/python/core/emitter.py 050af16 Diff: https://reviews.apache.org/r/52391/diff/ Testing ------- Manually tested. Unit tests pass. Thanks, Aravindan Vijayan