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

["Aravindan Vijayan (JIRA)" <ji...@apache.org>]

Aravindan Vijayan created AMBARI-18518:
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             Summary: Sinks should not try to read collector hosts from Zk if AMS is in embedded mode
                 Key: AMBARI-18518
                 URL: https://issues.apache.org/jira/browse/AMBARI-18518
             Project: Ambari
          Issue Type: Bug
          Components: ambari-metrics
    Affects Versions: 3.0.0
            Reporter: Aravindan Vijayan
            Assignee: Aravindan Vijayan
            Priority: Critical
             Fix For: 3.0.0


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

{code}
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)
{code}

After the change
{code}
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
{code}



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