Logging framework incompatibility

java compatibility apache-commons slf4j logback
Carl Smotricz picture Carl Smotricz · Aug 19, 2010 · Viewed 108.9k times · Source

I'm building a small Java app and hoping to use logback for logging.

My app has a dependency on an older project that does its logging via 

org.apache.commons | com.springsource.org.apache.commons.logging | 1.1.1

...so my plan was to use 

org.slf4j | jcl-over-slf4j | 1.5.6

...to redirect the JCL logging to 

org.slf4j | slf4j-api | 1.6.0

...and ultimately to 

ch.qos.logback | logback-classic | 0.9.22
ch.qos.logback | logback-core | 0.9.22

so my app can log through logback via its slf4j API while the old library code can log into the same location via the redirection.

Alas, this results in 

java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;Ljava/lang/Throwable;)V
at   org.apache.commons.logging.impl.SLF4JLocationAwareLog.info(SLF4JLocationAwareLog.java:141)

I've tried higher and lower verision numbers on some of these jars and also digging through API documentation and such... but I'm unable to find and solve the problem.

Help, please?

Although logback is considered the "strategic" logging framework, I have some leeway in which logging mechanism I ultimately use. I'd hope to use either logback or log4j, though, and I definitely want to merge the old project's logging into whatever the "new" logging framework ends up being, via a common configuration.

Answer

Holger Hoffstätte picture Holger Hoffstätte · Aug 20, 2010

You are mixing the 1.5.6 version of the jcl bridge with the 1.6.0 version of the slf4j-api; this won't work because of a few changes in 1.6.0. Use the same versions for both, i.e. 1.6.1 (the latest). I use the jcl-over-slf4j bridge all the time and it works fine.

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