[ 
https://issues.apache.org/jira/browse/SOLR-7887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425862#comment-16425862
 ] 

Steve Rowe edited comment on SOLR-7887 at 4/4/18 5:02 PM:
----------------------------------------------------------

Reopening to address Jenkins Maven builds' compilation failures for solr-core 
module, e.g. from [https://builds.apache.org/job/Lucene-Solr-Maven-7.x/172/]:

{noformat}
     [mvn] [INFO] Error for project: Apache Solr Core (during install)
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] Compilation failure
     [mvn] cannot access org.apache.yetus.audience.InterfaceAudience
     [mvn]   class file for org.apache.yetus.audience.InterfaceAudience not 
found
     [mvn] 
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] For more information, run Maven with the -e switch
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] BUILD ERRORS
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] Total time: 53 seconds
     [mvn] [INFO] Finished at: Wed Apr 04 00:54:42 UTC 2018
     [mvn] [INFO] Final Memory: 297M/1626M
     [mvn] [INFO] 
------------------------------------------------------------------------

BUILD FAILED
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-7.x/build.xml:679: The 
following error occurred while executing this line:
: Java returned: 1
{noformat}


was (Author: steve_rowe):
Reopening to address Jenkins Maven builds' compilation failures for solr-core 
module, e.g.:

{noformat}
     [mvn] [INFO] Error for project: Apache Solr Core (during install)
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] Compilation failure
     [mvn] cannot access org.apache.yetus.audience.InterfaceAudience
     [mvn]   class file for org.apache.yetus.audience.InterfaceAudience not 
found
     [mvn] 
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] For more information, run Maven with the -e switch
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] BUILD ERRORS
     [mvn] [INFO] 
------------------------------------------------------------------------
     [mvn] [INFO] Total time: 53 seconds
     [mvn] [INFO] Finished at: Wed Apr 04 00:54:42 UTC 2018
     [mvn] [INFO] Final Memory: 297M/1626M
     [mvn] [INFO] 
------------------------------------------------------------------------

BUILD FAILED
/x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Maven-7.x/build.xml:679: The 
following error occurred while executing this line:
: Java returned: 1
{noformat}

> 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, 
> SOLR-7887_followup_2.patch, SOLR-7887_followup_2.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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