[jgroups-users] JGroups 4.0.13.Final

Morning!

I just released 4.0.13.Final; the most interesting issues solved were:

- CENTRAL_LOCK2 [1]: new implementation of the lock protocol. On coord 
crash/leave, the new coord asks all members for their existing locks and 
pending lock requests. This eliminates the need for backup(s) of lock info.

- Changed the way a coord leaves gracefully [2]: instead of creating the 
last view itself, the leaving coord asks the next-in-line to create and 
install it. This has the advantage that the new coord can retransmit the 
view (if lost) as it's stil alive and simplifies code, because the path 
for graceful leave and crash is now the same.

- Reactive style of merging [3]: when using MERGE3 and TCP, a merge 
could be only partial and multiple merge rounds would be needed, 
increasing the total time for a complete merge.
This was changed by providing a new event which implements a reactive 
style of discovery by invoking a callback every time a discovery 
response is received.


For a list of all issues see [4].

Cheers,



[1] https://issues.jboss.org/browse/JGRP-2249

[2] https://issues.jboss.org/browse/JGRP-2277

[3] https://issues.jboss.org/browse/JGRP-2281

[4] https://issues.jboss.org/projects/JGRP/versions/12337835

-- 
Bela Ban | http://www.jgroups.org


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