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Posted to users@wicket.apache.org by Sasha O <vi...@codebistro.com> on 2007/10/23 18:49:25 UTC

AbstractMethodError in logging

Hello Wicket people --

Love the framework so far.

Getting this message, have no idea how to deal with it:

<<<
Exception in thread "ModificationWatcher Task" 
java.lang.AbstractMethodError: 
org.slf4j.impl.Log4jLoggerAdapter.isTraceEnabled()Z
	at org.apache.wicket.util.thread.Task$1.run(Task.java:103)
	at java.lang.Thread.run(Thread.java:595)
 >>>

Apparently it relates to slf4j which otherwise seems to be working fine.

Thanks for your help,
-- Sasha


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Re: AbstractMethodError in logging

Posted by Sasha O <vi...@codebistro.com>.
John --

Thanks for the quick reply. That did it!

-- Sasha

John Krasnay wrote:
> On Tue, Oct 23, 2007 at 09:49:25AM -0700, Sasha O wrote:
>> Hello Wicket people --
>>
>> Love the framework so far.
>>
>> Getting this message, have no idea how to deal with it:
>>
>> <<<
>> Exception in thread "ModificationWatcher Task" 
>> java.lang.AbstractMethodError: 
>> org.slf4j.impl.Log4jLoggerAdapter.isTraceEnabled()Z
>> 	at org.apache.wicket.util.thread.Task$1.run(Task.java:103)
>> 	at java.lang.Thread.run(Thread.java:595)
>> Apparently it relates to slf4j which otherwise seems to be working fine.
>>
>> Thanks for your help,
>> -- Sasha
>>
> 
> Hi Sasha,
> 
> I recently had this problem when upgrading from beta2 to beta4. Check
> your version of slf4j-log4j12 (assuming you're using log4j-1.2.*). The
> version should match the version of slf4j-api that Wicket uses. For
> beta4 it's 1.4.2. The following dependency in pom.xml did the trick for
> me:
> 
>     <dependency>
>       <groupId>org.slf4j</groupId>
>       <artifactId>slf4j-log4j12</artifactId>
>       <version>1.4.2</version>
>     </dependency>
> 
> jk
> 
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
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> 
> 


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Re: AbstractMethodError in logging

Posted by John Krasnay <jo...@krasnay.ca>.
On Tue, Oct 23, 2007 at 09:49:25AM -0700, Sasha O wrote:
> Hello Wicket people --
> 
> Love the framework so far.
> 
> Getting this message, have no idea how to deal with it:
> 
> <<<
> Exception in thread "ModificationWatcher Task" 
> java.lang.AbstractMethodError: 
> org.slf4j.impl.Log4jLoggerAdapter.isTraceEnabled()Z
> 	at org.apache.wicket.util.thread.Task$1.run(Task.java:103)
> 	at java.lang.Thread.run(Thread.java:595)
> >>>
> 
> Apparently it relates to slf4j which otherwise seems to be working fine.
> 
> Thanks for your help,
> -- Sasha
> 

Hi Sasha,

I recently had this problem when upgrading from beta2 to beta4. Check
your version of slf4j-log4j12 (assuming you're using log4j-1.2.*). The
version should match the version of slf4j-api that Wicket uses. For
beta4 it's 1.4.2. The following dependency in pom.xml did the trick for
me:

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.4.2</version>
    </dependency>

jk

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