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IncompatibleClassChangeError

 
Ranch Hand
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Hi,
I have one java process that is running from past 8 months. This process has few java classes that uses Hashmaps. Just recently I started getting "IncompatibleClassChangeError" and the process just exits out. Could any one please tell me why this could happen.
Your help is greatly appreciated.
 
author and iconoclast
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A class has changed, and other classes that depend on it haven't been recompiled;

-or-

You've got some serialized objects in a file, database, or somewhere, and the class has been modified and recompiled since they were stored.
 
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