java.lang.LinkageError: loader (instance of org/mortbay/jetty/webapp/ > WebAppClassLoader): attempted duplicate class definition for name: > "test/repository/Repository$$FastClassByCGLIB$$415eb518"

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loader (instance of sun/misc/Launcher$AppClassLoader): attempted duplicate class definition for name: "org/apache/openjpa/jdbc/identifier/DBIdentifier$DBIdentifierType"
java.lang.LinkageError: loader (instance of org/mortbay/jetty/webapp/ > WebAppClassLoader): attempted duplicate class definition for name: > "test/repository/Repository$$FastClassByCGLIB$$415eb518"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.lang.reflect.Method.invoke(Method.java:597)

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