JGroups 3.2.0.Final released

I've released JGroups 3.2.0.Final, the most important features are:

• RELAY2 
• Used for cross-site replication in Infinispan.
• Compared to RELAY, RELAY2 allows to be connected to more than 1 site. In 3.3, we're planning to add hierarchical routing, ie. to allow for tree-like site composition.
• Multicasting across sites is also supported.
• [http://www.jgroups.org/manual-3.x/html/user-advanced.html#Relay2Advanced]
• Internationalized logging
•  The most important user-facing warnings and error messages (e.g. configuration errors) have been internationalized.
• Error/warning translations are in jg-messages.properties. If someone wants to translate these into a different language, e.g. French, just copy jg-messages.properties into jg-messages_fr.properties and translate the messages. The new file now only needs to be added to the classpath, no changes to JGroups !
• Reduction of error/warn messages
• Sometimes there are a lot of recurring warnings or error messages, e.g. warnings about messages received from different clusters, or warnings about messages from members with different JGroups versions.
• These can now be suppressed for a certain time, e.g. we can configure that there's only *one* warning every 60 seconds about messages from different clusters.
• [https://issues.jboss.org/browse/JGRP-1518]

A full list of features and bug fixes is here.

The manual can be found at http://www.jgroups.org/manual-3.x/html/index.html.

Questions and feedback as usual on the mailing lists.

Enjoy !

Bela Ban
Kreuzlingen, Oct 2012

JGroups 3.0.11 and 3.1.0 released

I'm happy to announce that I've released JGroups versions 3.0.11 and 3.1.0 !

3.0.11 is the 3.0.x branch which is used by the newly released EAP 6 / JBoss 7.x application server. It consists mainly of bug fixes (and one or two performance enhancements) backported from the 3.1 branch.

The 3.1.0 release has 90+ issues which were resolved (some of them backported to 3.0.x).

Here's a short list of the major issues resolved in 3.1.0, for details consult [2]:

• NAKACK, UNICAST and NAKACK2 now use a new internal data structure for message delivery and retransmission, which reduces the memory needed by JGroups
• MERGE3: a new merge protocol for large clusters
• RSVP: blocks the sender until a given message has been received by all members of the target set
• A new Total Order Anycast (TOA) protocol needed by the next version of Infinispan to deliver messages to a cluster subset in total order
• New discovery protocols for mod-cluster (not yet completely done), Rackspace and OpenStack
• MPerf / UPerf: dynamic multicast and unicast performance tests
• Concurrent joins to a non-existing cluster are faster, and there's less chances of a merge happening (optimization)
•  TCP: socket creation doesn't block sending of regular messages (optimization)

Both JGroups 3.0.11 and 3.1.0 can be downloaded from [1].  The updated documentation can be found at [3].

As usual, use the mailing lists or fora for questions.

Enjoy !


[1] https://sourceforge.net/projects/javagroups/files/JGroups/

[2] https://github.com/belaban/JGroups/blob/master/doc/ReleaseNotes-3.1.0.txt

[3] http://www.jgroups.org/manual-3.x/html/index.html