client version in cluster state dumps.

[GaryWKeim]

Terracotta-OSS/terracotta-platform#540

Terracotta-OSS/terracotta-core#1044

[anthonydahanne]

Thanks to this change, we'll be able to track clients version using the MnM stack; since the serial ID did not change, I'll make sure other PRs are version proof catching proper exceptions when deserializing

[anthonydahanne]

@myronkscott can you please add your review ? thanks

[myronkscott]

I have a concern that in rare cases, this change may crash the cluster. If a stripe split-brains, then heals, the active will as the other active for information that includes this serialized object. I know it is not a great solution, but maybe we should include version information as part of the UUID.

[myronkscott]

I think the best way to handle this is to add a new sub-class of PlatformConnectedClient which includes the version.

[myronkscott]

I think we need a new subclass rather than modifying the existing one.

[anthonydahanne]

hello, @myronkscott do you want me or @GaryWKeim to add this new subclass ?

[myronkscott]

hello, @myronkscott do you want me or @GaryWKeim to add this new subclass ?

I think we need to discuss. Even a subclass is bad as a legacy server will not have the sub-class and cause problems.