[jira] [Created] (FLINK-10907) Job recovery on the same JobManager causes JobManager metrics to report stale values

["Mark Cho (JIRA)" <ji...@apache.org>]

Mark Cho created FLINK-10907:
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             Summary: Job recovery on the same JobManager causes JobManager metrics to report stale values
                 Key: FLINK-10907
                 URL: https://issues.apache.org/jira/browse/FLINK-10907
             Project: Flink
          Issue Type: Bug
          Components: Core, Metrics
    Affects Versions: 1.4.2
         Environment: Verified the bug and the fix running on Flink 1.4

Based on the JobManagerMetricGroup.java code in master, this issue should still occur on Flink versions after 1.4.
            Reporter: Mark Cho


* JobManager loses and regains leadership if it loses connection and reconnects to ZooKeeper.
 * When it regains the leadership, it tries to recover the job graph.
 * During the recovery, it will try to reuse the existing {{JobManagerMetricGroup}} to register new counters and gauges under the same metric name, which causes the new counters and gauges to be registered incorrectly.
 * The old counters and gauges will continue to
report the stale values and the new counters and gauges will not report
the latest metric.

Relevant lines from logs
{code:java}
com.---.JobManager - Submitting recovered job e9e49fd9b8c61cf54b435f39aa49923f.
com.---.JobManager - Submitting job e9e49fd9b8c61cf54b435f39aa49923f (flink-job) (Recovery).
com.---.JobManager - Running initialization on master for job flink-job (e9e49fd9b8c61cf54b435f39aa49923f).
com.---.JobManager - Successfully ran initialization on master in 0 ms.
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'totalNumberOfCheckpoints'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'numberOfInProgressCheckpoints'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'numberOfCompletedCheckpoints'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'numberOfFailedCheckpoints'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'lastCheckpointRestoreTimestamp'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'lastCheckpointSize'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'lastCheckpointDuration'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'lastCheckpointAlignmentBuffered'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'lastCheckpointExternalPath'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'restartingTime'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'downtime'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'uptime'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'fullRestarts'. Metric will not be reported.[]
org.apache.flink.metrics.MetricGroup - Name collision: Group already contains a Metric with the name 'task_failures'. Metric will not be reported.[]
{code}
 



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