[GitHub] spark issue #18690: [SPARK-21334][CORE] Add metrics reporting service to Ext...

[raajay <gi...@git.apache.org>]

Github user raajay commented on the issue:

    https://github.com/apache/spark/pull/18690
  
    @jerryshao  My CustomSInk has the report function defined. What I did not have was an equivalent of JmxReporter defined in my CustomSink. The reporter essentially periodically invokes the report function defined in CustomSink


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