My application contains 3rd party jar (com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar)
that is compiled in Java6. I managed to use it on Tomcat 5.5 that runs Java5 but when I tried to deploy the same application on JBoss 5.1 – I get the error:
[org.jboss.detailed.classloader.ClassLoaderManager]
(main) Unexpected error during load
of:testdata.SomeAnnotation
java.lang.UnsupportedClassVersionError:
Bad version number in .class file
that I realized that happens not only to me. as described here.
my questions:
1) why is it possible to use this jar in web-servers such as tomcat but it still bothers Jboss 5.1 ?
2) Why does Jboss class loader load the application’s implementaiotn of Jweaver to be used for loading it framework and it doesn’t use Jboss aspectJ implementation. Perhaps I should configure its class loading to be parent-first and it will solve this problem?
Java is backwardly compatible, (a Java 5.0 jar can run on Java 6) but not forwardly compatible (A Java 6 jar cannot be used on Java 5.0)
You need to get a copy of the 3rd party Jar which is compiled for Java 5.0 or upgrade the version of Java to version 6 or later.