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From "Julien Buret (JIRA)" <>
Subject [jira] Created: (COLLECTIONS-266) Issue with MultiKey when serialized/deserialized via RMI
Date Tue, 11 Sep 2007 21:04:32 GMT
Issue with MultiKey when serialized/deserialized via RMI

                 Key: COLLECTIONS-266
             Project: Commons Collections
          Issue Type: Bug
          Components: KeyValue
    Affects Versions: 3.2
            Reporter: Julien Buret
            Priority: Minor

This is because the hash code of MultiKey is calculated only once. 

So if the MultiKey is deserialized in an other jvm, and if one at least of the subkeys defines
its hash code with System.identityHashCode() (for example all the enums does), then the hash
code of the MultiKey is no longer valid, and you can't retreive the key in your Map.

I fixed it by making the cached hash code field transient, and by recalculating the hash code
during deserialization. 

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