[AMBARI-18518] Sinks should not try to read collector hosts from Zk if AMS is in embedded mode

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.5.0
• Component/s: ambari-metrics
• Assignee: Aravindan Vijayan
• Reporter: Aravindan Vijayan
• Created: 03/Oct/16 21:08
• Updated: 05/Dec/16 22:21
• Resolved: 04/Oct/16 18:33

Description

Currently, an exception is constantly being thrown in sink logs.

2016-10-03 21:01:06,537 WARN  availability.MetricCollectorHAHelper (MetricCollectorHAHelper.java:findLiveCollectorHostsFromZNode(91)) - Unable to connect to z
ookeeper.
org.apache.hadoop.metrics2.sink.relocated.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /ambari-metrics-cluster
        at org.apache.hadoop.metrics2.sink.relocated.zookeeper.KeeperException.create(KeeperException.java:99)
        at org.apache.hadoop.metrics2.sink.relocated.zookeeper.KeeperException.create(KeeperException.java:51)
        at org.apache.hadoop.metrics2.sink.relocated.zookeeper.ZooKeeper.exists(ZooKeeper.java:1045)
        at org.apache.hadoop.metrics2.sink.relocated.zookeeper.ZooKeeper.exists(ZooKeeper.java:1073)
        at org.apache.hadoop.metrics2.sink.timeline.availability.MetricCollectorHAHelper.findLiveCollectorHostsFromZNode(MetricCollectorHAHelper.java:78)
        at org.apache.hadoop.metrics2.sink.timeline.AbstractTimelineMetricsSink.findPreferredCollectHost(AbstractTimelineMetricsSink.java:344)
        at org.apache.hadoop.metrics2.sink.timeline.AbstractTimelineMetricsSink.emitMetrics(AbstractTimelineMetricsSink.java:216)
        at org.apache.hadoop.metrics2.sink.timeline.HadoopTimelineMetricsSink.putMetrics(HadoopTimelineMetricsSink.java:345)
        at org.apache.hadoop.metrics2.impl.MetricsSinkAdapter.consume(MetricsSinkAdapter.java:186)
        at org.apache.hadoop.metrics2.impl.MetricsSinkAdapter.consume(MetricsSinkAdapter.java:43)
        at org.apache.hadoop.metrics2.impl.SinkQueue.consumeAll(SinkQueue.java:87)
        at org.apache.hadoop.metrics2.impl.MetricsSinkAdapter.publishMetricsFromQueue(MetricsSinkAdapter.java:134)
        at org.apache.hadoop.metrics2.impl.MetricsSinkAdapter$1.run(MetricsSinkAdapter.java:88)

After the change

2016-10-03 21:08:31,494 INFO  availability.MetricCollectorHAHelper (MetricCollectorHAHelper.java:findLiveCollectorHostsFromZNode(80)) - /ambari-metrics-cluster znode does not exist. Skipping requesting live instances from zookeeper

Issue Links

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