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From "Shawn Heisey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3706) Ship setup to log with log4j.
Date Wed, 06 Mar 2013 04:02:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13594333#comment-13594333
] 

Shawn Heisey commented on SOLR-3706:
------------------------------------

bq. I think you need to remove all slf4j jars from the war for it to work. When slf4j-api.jar
is in the war you won't be able to load slf4j-log4j*.jar from external location. Also I believe
various servlet container implementations may require you to put your logging classes in different
places for it to work. For wrapping up /example/ I believe it will work put them all in /example/lib.
Try it.

This is exactly right.  I created a patch that made a "dist-excl-slf4j" build target, and
modified the dist-war-excl-slf4j target.  Hoss committed it for me in SOLR-3918, on the condition
that I updated the wiki, which I did.  Now all slf4j jars are removed from the war.

I use the jetty included with the example in production, and log4j finally worked when I put
the slf4j and log4j jars in lib/ext.

                
> Ship setup to log with log4j.
> -----------------------------
>
>                 Key: SOLR-3706
>                 URL: https://issues.apache.org/jira/browse/SOLR-3706
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 5.0, 4.3
>
>
> Currently we default to java util logging and it's terrible in my opinion.
> *It's simple built in logger is a 2 line logger.
> *You have to jump through hoops to use your own custom formatter with jetty - either
putting your class in the start.jar or other pain in the butt solutions.
> *It can't roll files by date out of the box.
> I'm sure there are more issues, but those are the ones annoying me now. We should switch
to log4j - it's much nicer and it's easy to get a nice single line format and roll by date,
etc.
> If someone wants to use JUL they still can - but at least users could start with something
decent.

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