Migrating from JBoss 4 to JBoss 6

[siben_nayak]

Hello,

I am facing the following error while deploying my application on JBoss 6.0.0Final. The application was working fine on JBoss 4.2.0GA

13:43:14,785 WARN  [ClassLoaderManager] Unexpected error during load of:javax.activation.DataHandler$ObjectDataSource: java.lang.SecurityException: class "javax.activati
on.DataHandler$ObjectDataSource"'s signer information does not match signer information of other classes in the same package
        at java.lang.ClassLoader.checkCerts(ClassLoader.java:775) [:1.6.0_04]
        at java.lang.ClassLoader.preDefineClass(ClassLoader.java:487) [:1.6.0_04]
        at java.lang.ClassLoader.defineClass(ClassLoader.java:614) [:1.6.0_04]
        at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:52) [jboss-classloader.jar:2.2.0.GA]
        at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:650) [jboss-classloader.jar:2.2.0.GA]
        at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:609) [jboss-classloader.jar:2.2.0.GA]
        at java.security.AccessController.doPrivileged(Native Method) [:1.6.0_04]
        at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:608) [jboss-classloader.jar:2.2.0.GA]
        at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:585) [jboss-classloader.jar:2.2.0.GA]
        at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:156) [jboss-classloader.jar:2.2.0.GA]

Is there a solution to the above problem?

Thanks,

Siben

[tcunning]

The error is saying that all classes of the same package must be signed with the same certificate.      Are you signing your JARs?

When you built your code, did you build it against 4.2.0 or 6?

[siben_nayak]

Problem solved. The problem was due to an old activation.jar present in the war when it was being built against JBoss 4.2. Replaced it with the new jar from JBoss 6 and it works now. Thanks