This is a discussion for the fix to GEODE-4008: InvalidClassException when deserializing FunctionAdapter from pre Geode clients
There was a change to deprecate FunctionAdapter in Geode (before 1.0), and this also removed the method signatures in the class. This caused Java to generate a new serialVersionUID to the class because one was not assigned previously. However we have clients pre Geode that when they attempt to execute a function by serializing the function across (not using a function id), the FunctionAdapter class is unable to deserialize properly. The proposed fix is to assign a serialVersionUID to the class that matches that of the pre Geode FunctionAdapter. This will cause any Geode 1.0-1.3 clients to now run into the error but the older clients would work fine. Because FunctionAdapter has been deprecated it should be easy enough for Geode 1.0-1.3 users to change their custom classes to implement Function directly and not use the deprecated FunctionAdapter class. Please let me know if there is a better solution or if there are problems with the proposed fix. Thanks, -Jason
