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Subject [GitHub] [flink] zentol opened a new pull request #15975: [FLINK-22646][coordination] SlotManagers unregister metrics in suspend()
Date Thu, 20 May 2021 12:24:06 GMT

zentol opened a new pull request #15975:
URL: https://github.com/apache/flink/pull/15975

   Modified version of #15904.
   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 unnecessary
logging noise
   b) The metric may produce an NPE when accessed by a reporter during suspend().

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