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https://issues.apache.org/jira/browse/SOLR-7887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414402#comment-16414402
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Varun Thacker commented on SOLR-7887:
-------------------------------------
{quote}bq. validate the command line flags : rotate_solr_logs ,
SOLR_LOG_PRESTART_ROTATION mentioned under "Permanent Logging Settings"
http://lucene.apache.org/solr/guide/7_2/configuring-logging.html
{quote}
"You can disable the automatic log rotation at startup by changing the setting
SOLR_LOG_PRESTART_ROTATION found in bin/solr.in.sh or bin/solr.in.cmd to
false." .
I think this feature will be broken by the commit because in the default
log4j2.xml enables this by default <OnStartupTriggeringPolicy />
So I think we should just remove this from the log4j2.xml and let
SOLR_LOG_PRESTART_ROTATION and the start script to it's rotation . Does that
make sense [~janhoy] ?
> 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
> Reporter: Shawn Heisey
> Assignee: Erick Erickson
> Priority: Major
> Fix For: 7.4
>
> Attachments: SOLR-7887-WIP.patch, SOLR-7887-eoe-review.patch,
> SOLR-7887-eoe-review.patch, SOLR-7887-followup_1.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, 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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