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https://issues.apache.org/jira/browse/SPARK-24464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16533461#comment-16533461
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Liang-Chi Hsieh commented on SPARK-24464:
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Because {{Instrumentation}} is used for logging, I wonder the test for it is to
verify logging console output?
> Unit tests for MLlib's Instrumentation
> --------------------------------------
>
> Key: SPARK-24464
> URL: https://issues.apache.org/jira/browse/SPARK-24464
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 2.3.0
> Reporter: Xiangrui Meng
> Priority: Major
>
> We added Instrumentation to MLlib to log params and metrics during machine
> learning training and inference. However, the code has zero test coverage,
> which usually means bugs and regressions in the future. I created this JIRA
> to discuss how we should test Instrumentation.
> cc: [~thunterdb] [~josephkb] [~lu.DB]
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