[jboss-jira] [JBoss JIRA] Created: (JBCACHE-1211) Cache marshaller breaks when marshalling more than 32767 of "certain" objects in a single stream

[Manik Surtani (JIRA)]

Cache marshaller breaks when marshalling more than 32767 of "certain" objects in a single stream
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                 Key: JBCACHE-1211
                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1211
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Replication
    Affects Versions: 2.0.0.GA
            Reporter: Manik Surtani
         Assigned To: Manik Surtani
            Priority: Critical
             Fix For: 2.1.0.GA


This is a nasty.  What started life as an optimisation for certain types of objects in a marshalled stream (Fqn, GlobalTransactio, String and Serializable) has become a major limitation in that a single stream can only hold up to 32767 different (not equal()) instances of such objects.

Basically the optimisation was, for example, instead of writing "hello" to a stream twice, just write it once and use a reference for all subsequent times.  Unfortunately this reference was encoded as a short, hence the limitation of 32767.

Fixing this will definitely break wire compatibility with JBoss Cache 2.0.0, although JBC does allow backward compatibility by specifying replication version in your configuration, thanks to the VersionAwareMarshaller.




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