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https://issues.apache.org/jira/browse/TEZ-2222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16684394#comment-16684394
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Jonathan Eagles commented on TEZ-2222:
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[~yingdachen], thank you for the update. It helps to have context over the
changes that are being made. It will be difficult to see the effect on Tez
running on YARN without a YARN runtime environment. We will keep this JIRA open
so that the work can be tracked.
> Investigate moving to log4j2 for logging
> ----------------------------------------
>
> Key: TEZ-2222
> URL: https://issues.apache.org/jira/browse/TEZ-2222
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Priority: Blocker
>
> Via slf4j.
> Some bits to keep in mind
> - We have explicit code which rotates logs using direct log4j12 APIs. This
> should keep working. I believe the log4j2 APIs are different here
> - API compatibility between log4j12 / log4j2 can be problematic - if both end
> up on the classpath (I believe the APIs are different)
> - Hadoop dist includes a slf4j-log4j12 binding. Changing the default can
> result in sl4j-log4j12 and slf4j-log4j2 to co-exist by default - which could
> be problematic. Needs investigation.
> End of the day, we will likely need an option to use either of the two.
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