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From "Steve Loughran (JIRA)" <>
Subject [jira] [Commented] (SPARK-6305) Add support for log4j 2.x to Spark
Date Wed, 29 Aug 2018 14:30:00 GMT


Steve Loughran commented on SPARK-6305:

bq. Could be possible that nobody is swapping it out for JUL since JUL is terrible.

I don't disagree, though if you get into the depths of kerberos debugging, you end up there.

regarding usable back-ends to SLF4J, there's logback, which is performant at the expense of
being async (pro: reduced impact of logging in locked areas; con: process crash can lose the
last logged bits)

Is the logging control in spark done only in tests, or in the production side of things? If
its only test-side, then log4j core can go on the CP there

> Add support for log4j 2.x to Spark
> ----------------------------------
>                 Key: SPARK-6305
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: Build
>            Reporter: Tal Sliwowicz
>            Priority: Minor
> log4j 2 requires replacing the slf4j binding and adding the log4j jars in the classpath.
Since there are shaded jars, it must be done during the build.

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