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From "Shawn Heisey (JIRA)" <>
Subject [jira] [Commented] (SOLR-7887) Upgrade Solr to use log4j2 -- log4j 1 now officially end of life
Date Thu, 02 Jun 2016 16:12:59 GMT


Shawn Heisey commented on SOLR-7887:

I suspect that the log4j project would say that hadoop is using log4j incorrectly.

My gut reaction is that a HADOOP-NNNN issue needs to be filed, but I do not want to do that
without discussing it with them first.  I am a member of far too many mailing lists already,
but I may need to temporarily acquire another one.

> Upgrade Solr to use log4j2 -- log4j 1 now officially end of life
> ----------------------------------------------------------------
>                 Key: SOLR-7887
>                 URL:
>             Project: Solr
>          Issue Type: Task
>    Affects Versions: 5.2.1
>            Reporter: Shawn Heisey
>         Attachments: SOLR-7887-WIP.patch
> The logging services project has officially announced the EOL of log4j 1:
> 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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