[logback-user] jul-to-slf4j conflicts with logback-classic

Ceki Gulcu listid at qos.ch
Thu Oct 23 10:58:54 CEST 2008

Hi Gili,

Which version of SLF4J are you using? I am asking because SLF4J 1.5.5 corrected 
what might be a related problem.

I should be available on IRC. Try to catch me if you can.

cowwoc wrote:
> Ceki,
> I need your help with this.
> I noticed that I can deploy the libraries just fine so long as I omit the
> call to SLF4JBridgeHandler.install(). If I invoke that method then:
> 1) I never see any more output from stdout
> 2) Glassfish no longer replies to commands (I have to kill it using task
> manager)
> It also doesn't look like logback.xml is getting picked up because I have
> debug="true" in my configuration but I see nothing special on startup.
> Can we schedule another IRC session to troubleshoot this?
> Thanks,
> Gili
> cowwoc wrote:
>> Hi,
>> If I deploy:
>> slf4j-api
>> logback-classic
>> logback-core
>> jul-to-slf4j
>> I get:
>> Deploying application in domain failed; Logging factory implementation
>> cannot be null. See also http://www.slf4j.org/codes.html#null_LF
>> but if I remove jul-to-slf4j from the classpath it works just fine
>> (except, obviously, jul-to-slf4j is disabled).
>> I am invoking SLF4JBridgeHandler.install() from within a
>> ServletContextListener. Perhaps this is too late somehow?
>> What am I doing wrong?
>> Thank you,
>> Gili

Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.

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