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https://issues.apache.org/jira/browse/SOLR-7887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16386500#comment-16386500
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Shawn Heisey commented on SOLR-7887:
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bq. Are you talking about one of the log4j2.xml files?
I also noticed that there were multiple files, so I wanted to sanity check
which xml file was being used for Solr startup. I made a little change to the
fileName parameter in what I assumed was the right one. The filename in the
exception didn't change. What finally changed the exception message was
modifying server/scripts/cloud-scripts/log4j2.xml, which was definitely a
surprise.
Solr 8.0-SNAPSHOT *does* start even with the multiple exceptions, and when it
starts, the dashboard doesn't show a sysprop definition for the log4j config
file. I'm assuming it should be there. It is there on my 6.6.2 dev server:
-Dlog4j.configuration=file:/index/solr6/log4j.properties
> Upgrade Solr to use log4j2 -- log4j 1 now officially end of life
> ----------------------------------------------------------------
>
> Key: SOLR-7887
> URL: https://issues.apache.org/jira/browse/SOLR-7887
> Project: Solr
> Issue Type: Task
> Affects Versions: 5.2.1
> Reporter: Shawn Heisey
> Assignee: Varun Thacker
> Priority: Major
> Attachments: SOLR-7887-WIP.patch, SOLR-7887-eoe-review.patch,
> SOLR-7887-eoe-review.patch, SOLR-7887.patch, SOLR-7887.patch,
> SOLR-7887.patch, SOLR-7887.patch, SOLR-7887.patch, SOLR-7887.patch,
> SOLR-7887.patch, SOLR-7887.patch, SOLR-7887.patch, SOLR-7887.patch
>
>
> The logging services project has officially announced the EOL of log4j 1:
> https://blogs.apache.org/foundation/entry/apache_logging_services_project_announces
> In the official binary jetty deployment, we use use log4j 1.2 as our final
> logging destination, so the admin UI has a log watcher that actually uses
> log4j and java.util.logging classes. That will need to be extended to add
> log4j2. I think that might be the largest pain point to this upgrade.
> There is some crossover between log4j2 and slf4j. Figuring out exactly which
> jars need to be in the lib/ext directory will take some research.
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