Hi,

I think the solution is to just include the logback-0.9.9 dependency version, 
like this:

<!--
                <dependency>
                        <groupId>org.slf4j</groupId>
                        <artifactId>slf4j-api</artifactId>
                        <type>jar</type>
                        <version>1.6.2</version>
                </dependency>
 -->
<dependency>
                        <groupId>ch.qos.logback</groupId>
                        <artifactId>logback-classic</artifactId>
                        <type>jar</type>
                        <version>0.9.9</version>
                </dependency>

Now I get the following transitive dependencies:

[INFO] +- ch.qos.logback:logback-classic:jar:0.9.9:compile
[INFO] |  +- ch.qos.logback:logback-core:jar:0.9.9:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.5.0:compile

This seems contradictory to what the "Baby Steps" in the user manual has though:
http://logback.qos.ch/manual/introduction.html

The baby steps indicate that we should be running with slf4j 1.6.2.  Thoughts?

Cheers,
- Ole



On 10/06/2011 09:11 PM, Ole Ersoy wrote:
Hi,

I'm attempting to use slf4j with logback. I see the following when I
start tomcat:

SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding.
SLF4J: Your binding is version 1.5.5 or earlier.
SLF4J: Upgrade your binding to version 1.6.x. or 2.0.x

I'm using the following version of slf4j and logback:

[INFO] +- org.slf4j:slf4j-api:jar:1.6.2:compile
[INFO] +- ch.qos.logback:logback-classic:jar:0.9.9:compile
[INFO] | \- ch.qos.logback:logback-core:jar:0.9.9:compile

I also get the exception pasted at the bottom of this email. I read up
on it and hibernate, ran mvn dependency:tree, and looked for other slf4j
versions. I did not find any. I do have a dependency on JCL though. Any
ideas on what the problem could be?

TIA,
- Ole

org.springframework.beans.factory.BeanCreationException: Error creating
bean with name
'org.springframework.validation.beanvalidation.LocalValidatorFactoryBean#0':
Invocation of init method failed; nested exception is
java.lang.NoSuchMethodError:
org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder;

at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)

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