java.lang.ClassFormatError: DirectoryZipFTP (Illegal constant pool type)

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    java.lang.ClassFormatError: DirectoryZipFTP (Illegal constant pool type)
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    Root Cause Analysis

    1. java.lang.ClassFormatError

      DirectoryZipFTP (Illegal constant pool type)

      at java.lang.ClassLoader.defineClass0()
    2. Java RT
      ClassLoader.loadClassInternal
      1. java.lang.ClassLoader.defineClass0(Native Method)
      2. java.lang.ClassLoader.defineClass(ClassLoader.java:486)
      3. java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
      4. java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
      5. java.net.URLClassLoader.access$100(URLClassLoader.java:56)
      6. java.net.URLClassLoader$1.run(URLClassLoader.java:195)
      7. java.security.AccessController.doPrivileged(Native Method)
      8. java.net.URLClassLoader.findClass(URLClassLoader.java:188)
      9. java.lang.ClassLoader.loadClass(ClassLoader.java:297)
      10. sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
      11. java.lang.ClassLoader.loadClass(ClassLoader.java:253)
      12. java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
      12 frames