org.apache.shiro.session.mgt.SimpleSession serializes fields twice
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                 Key: SHIRO-325
                 URL: https://issues.apache.org/jira/browse/SHIRO-325
             Project: Shiro
          Issue Type: Bug
          Components: Session Management
    Affects Versions: 1.1.0, 1.0.0
            Reporter: Les Hazlewood
            Assignee: Les Hazlewood
             Fix For: 1.2.0


SimpleSession serializes fields twice - once via the 'writeObject' 
implementations' call to out.writeDefaultObject(), and again via the custom 
bitmask-based serialization that follows it.

The internal fields should be marked as transient to prevent this.  
out.writeDefaultObject should still be called for JVM security reasons, but 
SimpleSession's custom field-based serialization is more efficient so it should 
be retained.  The solution is to mark all custom-serialized fields as transient.

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