Chesnay Schepler created FLINK-22725:
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Summary: SlotManagers should unregister metrics at the start of
suspend()
Key: FLINK-22725
URL: https://issues.apache.org/jira/browse/FLINK-22725
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination, Runtime / Metrics
Affects Versions: 1.13.0
Reporter: Chesnay Schepler
Assignee: Chesnay Schepler
Fix For: 1.14.0, 1.13.1
Slotmanagers register metrics in start(), but only unregister them in close().
This has 2 issues:
a) If the SM is restarted it cannot re-register the metrics because the old
ones are still present; this isn't a critical problem (because the old ones
still work) but it produces unnecesasry logging noise
b) The metric may produce an NPE when accessed by a reporter during suspend().
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