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https://issues.apache.org/jira/browse/SOLR-13268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775737#comment-16775737
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Kevin Risden commented on SOLR-13268:
-------------------------------------

Some other info about log4j2 and LMAX releases.

We are on LMAX 3.4.0 and there is a 3.4.2 with changes related to 
`BatchEventProcessor` which was in the stack trace
 * 3.4.1 - Fix race between run() and halt() on BatchEventProcessor.
 * 3.4.2 - Fix for race condition on restart of BatchEventProcessor with 3 or 
more threads.
 * https://github.com/LMAX-Exchange/disruptor/releases

Upgrading LMAX disrupter to 3.4.2 was in the log4j 2.11.1 release notes. We 
could also upgrade log4j2 2.11.0 -> 2.11.2.

Not sure if these would help but probably wouldn't hurt either.

> Clean up any test failures resulting from SOLR-12055 (async logging)
> --------------------------------------------------------------------
>
>                 Key: SOLR-13268
>                 URL: https://issues.apache.org/jira/browse/SOLR-13268
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>            Priority: Major
>
> This is a catch-all for test failures due to the async logging changes. So 
> far, the I see a couple failures on JDK13 only. I'll collect a "starter set" 
> here, these are likely systemic, once the root cause is found/fixed, then 
> others are likely fixed as well.
> JDK13:
> ant test  -Dtestcase=TestJmxIntegration -Dtests.seed=54B30AC62A2D71E 
> -Dtests.multiplier=3 -Dtests.slow=true -Dtests.locale=lv-LV 
> -Dtests.timezone=Asia/Riyadh -Dtests.asserts=true -Dtests.file.encoding=UTF-8
> ant test  -Dtestcase=TestDynamicURP -Dtests.seed=54B30AC62A2D71E 
> -Dtests.multiplier=3 -Dtests.slow=true -Dtests.locale=rwk 
> -Dtests.timezone=Australia/Brisbane -Dtests.asserts=true 
> -Dtests.file.encoding=UTF-8



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