Re: [equinox-dev] Commons logging madness

["Peter Neubauer" <peter@xxxxxxxxxxx>]

Hal,
at OPS4J we came across the same logging mess, so I would recommend to
take a look at Pax Logging:
http://wiki.ops4j.org/confluence/display/ops4j/Pax+Logging

Cheers

/peter

On 12/21/06, Hal Hildebrand <hal.hildebrand@xxxxxxxxxx> wrote:
>  Cross posting this on the equinox dev and Spring/OSGi lists.
>
>  I'm desperately trying to get logging to work in the Spring/OSGi testing
> environment as I simply have no hair left - having pulled it out from
> frustration.  Those who know me will understand that this is a lot of hair.
>
>  So, in desperation, I finally turned on the commons logging diagnostic
> information so I can see something - anything - that will tell me what the
> heck is going on.  Attached is the trace running under Equinox 3.2.1 and
> from running under Knopflerfish 2.0.1.
>
>  The same loaded bundle configuration is used for both runs.  In the KF
> case, the log4J implementation is discovered and used as expected.  In the
> Equinox case, the Log4J configuration fails because of  which results in
> commons logging using the JDK logging implementation.
>
>  The problem appears to be multiple versions of
> org.apache.commons.logging.Log which causes – as one might expect – a class
> mismatch problem.
>
>  In both the KF and Equinox case, I have set the OSGi System property
> "org.osgi.framework.bootdelegation" to
> "javax.*,org.w3c.*,sun.*,org.xml.*,com.sun.*".  So, I'm not sure what's
> happening.  I'm stumped as to what's going on.
>
>  Below are the relevant sections of trace output in the Equinox case
> (there's a lot of output, sorry).
>
>  Any help would be appreciated in tracking this down...
>
>
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> [WARNING] the context classloader is not part of a parent-child relationship
> with the classloader that loaded LogFactoryImpl.
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Trying to load
> 'org.apache.commons.logging.impl.Log4JLogger' from
> classloader
> org.eclipse.core.runtime.internal.adaptor.ContextFinder@667901
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Class 'org.apache.commons.logging.impl.Log4JLogger' was
> found at
> 'jar:file:/Users/hhildebrand/.m2/repository/org/springframework/osgi/commons-logging.osgi/1.1-SNAPSHOT/commons-logging.osgi-1.1-SNAPSHOT.jar!/org/apache/commons/logging/impl/Log4JLogger.class'
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> The log adapter
> 'org.apache.commons.logging.impl.Log4JLogger' is missing
> dependencies when loaded via classloader
> org.eclipse.core.runtime.internal.adaptor.ContextFinder@667901:
> org/apache/log4j/Category
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Attempting to instantiate
> 'org.apache.commons.logging.impl.Jdk14Logger'
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> [WARNING] the context classloader is not part of a parent-child relationship
> with the classloader that loaded LogFactoryImpl.
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Trying to load
> 'org.apache.commons.logging.impl.Jdk14Logger' from
> classloader
> org.eclipse.core.runtime.internal.adaptor.ContextFinder@667901
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Class 'org.apache.commons.logging.impl.Jdk14Logger' was
> found at
> 'jar:file:/Users/hhildebrand/.m2/repository/org/springframework/osgi/commons-logging.osgi/1.1-SNAPSHOT/commons-logging.osgi-1.1-SNAPSHOT.jar!/org/apache/commons/logging/impl/Jdk14Logger.class'
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Class 'org.apache.commons.logging.impl.Jdk14Logger' was
> found in classloader
> org.eclipse.core.runtime.internal.adaptor.ContextFinder@667901.
> It is bound to a Log interface which is not the one loaded from classloader
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Warning: bad log hierarchy. You have more than one version of
> 'org.apache.commons.logging.Log' visible.
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Trying to load
> 'org.apache.commons.logging.impl.Jdk14Logger' from
> classloader
> org.apache.maven.surefire.booter.IsolatedClassLoader@14994372
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Class 'org.apache.commons.logging.impl.Jdk14Logger' was
> found at
> 'jar:file:/Users/hhildebrand/.m2/repository/org/springframework/osgi/commons-logging.osgi/1.1-SNAPSHOT/commons-logging.osgi-1.1-SNAPSHOT.jar!/org/apache/commons/logging/impl/Jdk14Logger.class'
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Class 'org.apache.commons.logging.impl.Jdk14Logger' was
> found in classloader
> org.apache.maven.surefire.booter.IsolatedClassLoader@14994372.
> It is bound to a Log interface which is not the one loaded from classloader
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881
>  [LogFactoryImpl@15479518 from
> org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@4999881]
> Warning: bad log hierarchy. You have more than one version of
> 'org.apache.commons.logging.Log' visible.
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