Same Classes in different jars (lib-directory)

[tbar0711]

Hello,

I have a question about the behavior of JBoss if there are 2 different jars in the lib-directory with the same class inside.

For example:
I have the hibernate3.jar and the hibernate-jbosscache-3.3.2.GA.jar in the JBoss-lib-directory. Both have org.hibernate.cache.TreeCacheProvider inside.

In the hibernate.cfg.xml I have a reference to this class:
org.hibernate.cache.TreeCacheProvider

Which one will JBoss use? The one from hibernate3.jar or the one inside hibernate-jbosscache-3.3.2.GA.jar?

Thanks in advance.
Tom

[alesj]

It depends on how the jars are ordered in classpath.
It's on the find-first basis in this case.

[tbar0711]

Thanks, but what do I have to do to have a look into the classpath and see the order of the jars? I don't now how to reach the classpath.

JBoss is running on a LINUX plattform.

Tom

[peterj]

One way if finding out which class gets used is to add the -verbose:class JVM option to JAVA_OPTS in run.conf. This option causes the JVM to print out each class loaded and the JAR from which it came.