java.lang.ClassFormatError: org.apache.cactus.server.runner.ServletTestRunner.

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org.apache.cactus.server.runner.ServletTestRunner.
java.lang.ClassFormatError: org.apache.cactus.server.runner.ServletTestRunner.
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:516)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:235)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)

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