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https://issues.apache.org/jira/browse/ZOOKEEPER-850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13085444#comment-13085444
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Olaf Krische commented on ZOOKEEPER-850:
----------------------------------------

@Holger 

For testing it is ok to depend on log4j. I must log somehow, right? Especially 
if i test on cli, when there is no runtime like eclipse, which could pass me a 
default logger.

But i might agree with you, that it is a bug, when zookeeper subprojects like 
client, server and tests are bound together so tight, that test dependencies, 
like logging with log4j, are carried out to server and client as well, just 
because there is no special context for testing. I was wondering this on my 
comment from 07/Dec/10 as well. In Maven i am used to have a test context. But 
is it possible with ant scripts?

> Switch from log4j to slf4j
> --------------------------
>
>                 Key: ZOOKEEPER-850
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-850
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: java client
>    Affects Versions: 3.3.1
>            Reporter: Olaf Krische
>            Assignee: Olaf Krische
>             Fix For: 3.4.0
>
>         Attachments: ZOOKEEPER-3.3.1-log4j-slf4j-20101031.patch.bz2, 
> ZOOKEEPER-3.4.0-log4j-slf4j-20101102.patch.bz2, ZOOKEEPER-850.patch, 
> ZOOKEEPER-850.patch, ZOOKEEPER-850.patch, ZOOKEEPER-850.patch
>
>
> Hello,
> i would like to see slf4j integrated into the zookeeper instead of relying 
> explicitly on log4j.
> slf4j is an abstract logging framework. There are adapters from slf4j to many 
> logger implementations, one of them is log4j.
> The decision which log engine to use i dont like to make so early.
> This would help me to embed zookeeper in my own applications (which use a 
> different logger implemenation, but slf4j is the basis)
> What do you think?
> (as i can see, those slf4j request flood all other projects on apache as well 
> :-)
> Maybe for 3.4 or 4.0?
> I can offer a patchset, i have experience in such an migration already. :-)

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