[jira] [Created] (FLINK-10917) Bump up the version of codahale's metrics-core to 3.2.3 or higher

["Dongwon Kim (JIRA)" <ji...@apache.org>]

Dongwon Kim created FLINK-10917:
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             Summary: Bump up the version of codahale's metrics-core to 3.2.3 or higher
                 Key: FLINK-10917
                 URL: https://issues.apache.org/jira/browse/FLINK-10917
             Project: Flink
          Issue Type: Improvement
          Components: Metrics
            Reporter: Dongwon Kim


I've experienced back pressure once in a while from a streaming pipeline of mine [1].
I strongly suspect SlidingTimeWindowReservoir from io.dropwizard.metrics:metrics-core:3.1.5.
It is known to cause long GCs [2] so a new implementation called SlidingTimeWindowArrayReservoir is introduced in v3.2.3.

So I suggest to bump up codahale's metrics-core to v3.2.3 or higher to use the new implementation to prevent back pressure which actually has nothing to do with Flink itself.

I just tested compatibility very simply by importing io.dropwizard.metrics:metrics-core:4.0.3 in my own project in order to shadow v3.1.5 which is introduced by flink-metrics-dropwizard.
It works without any incompatibility issues for me; there was NoSuchMethodError.

However, I'm not sure whether bumping up to 3.2.x or 4.x is okay for other users.

[1] https://www.slideshare.net/ssuser6bb12d/realtime-driving-score-service-using-flink/30
[2] https://github.com/dropwizard/metrics/pull/1139



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