Github user zentol commented on the pull request:
https://github.com/apache/flink/commit/707606ac40dbbbd497fcbbb5442870fec5468bf3#commitcomment-17574494
In
flink-core/src/main/java/org/apache/flink/metrics/groups/JobMetricGroup.java:
In
flink-core/src/main/java/org/apache/flink/metrics/groups/JobMetricGroup.java on
line 97:
this can produce wrong metrics for the Batch API. Metrics directly
associated with a job will be reset if at any point a given TM has no tasks for
a job.
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