javax.persistence.PersistenceException: Unable to build entity manager factory

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    javax.persistence.PersistenceException: Unable to build entity manager factory
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    javax.persistence.PersistenceException: Unable to build entity manager factory
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    javax.persistence.PersistenceException: Unable to build entity manager factory
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    javax.persistence.PersistenceException: Unable to build entity manager factory

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    Root Cause Analysis

    1. javax.persistence.PersistenceException

      Unable to build entity manager factory

      at org.apache.tools.ant.taskdefs.ExecuteJava.execute()
    2. Ant
      UnknownElement.execute
      1. org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:195)
      2. org.apache.tools.ant.taskdefs.Java.run(Java.java:772)
      3. org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:222)
      4. org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:136)
      5. org.apache.tools.ant.taskdefs.Java.execute(Java.java:109)
      6. org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
      6 frames
    3. Java RT
      Method.invoke
      1. sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
      2. sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      3. java.lang.reflect.Method.invoke(Unknown Source)
      3 frames