JBoss で "java.lang.SecurityException: class x.y.z.SomeClass's signer information does not match signer information of other classes in the same package" エラーが発生しました

Issue

• EAP を起動すると、以下の例外が発生します。

  WARN  [ClassLoaderManager] Unexpected error during load of:x.y.z.SomeClassjava.lang.SecurityException: class "x.y.z.SomeClass"'s signer information does not match signer information of other classes in the same package
   at java.lang.ClassLoader.checkCerts(ClassLoader.java:776)
   at java.lang.ClassLoader.preDefineClass(ClassLoader.java:488)
   at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
  ...