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https://issues.apache.org/jira/browse/KAFKA-1044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16044842#comment-16044842
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Viktor Somogyi commented on KAFKA-1044:
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[~ewencp], thank you, started working on it.
I found two incompatibilities and I'm asking your advice in the resolution.
* Fatal logging level: slf4j doesn't support it
* kafka.utils.Log4jController: there are some log4j specific features used
here that can't be replaced with a generic solution
I have two solutions for these:
# we could simply use the log4j-over-slf4j package. This will redirect all
Fatal logs to Error level and also provides some of the functionalities
required by Log4jController (but not all).
* Pros: a few lines of changes only, quite straightforward
* Cons: loss of features. However Fatal can't be worked around so we have
to accept that, but we also lose Log4jController.getLoggers as there is no way
of collecting the current loggers by simply relying on slf4j. Also other
methods' behaviour will change (no way to detect existing loggers in slf4j as
far as I'm aware of it)
# we could separate off Log4jController into a separate module and have the
users to put it on the classpath explicitly if they use log4j for logging. From
Logging class we can instantiate it by reflection.
* Pros: except Fatal logging level we keep all the features
* Cons: more complicated and breaking, also requires documentation so users
will be aware of this
I'm attaching patches of both solutions (and they are rather work in progress,
I just want to show approximate solutions) just in case
> change log4j to slf4j
> ----------------------
>
> Key: KAFKA-1044
> URL: https://issues.apache.org/jira/browse/KAFKA-1044
> Project: Kafka
> Issue Type: Bug
> Components: log
> Affects Versions: 0.8.0
> Reporter: shijinkui
> Assignee: Viktor Somogyi
> Priority: Minor
> Labels: newbie
>
> can u chanage the log4j to slf4j, in my project, i use logback, it's conflict
> with log4j.
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