Ours is a J2EE application (clustered across 4 nodes) internally using Infinispan Cache (Ver 6.0.2) with JGroups (Ver 3.4.1) as transport layer of our cache.

Application had been running perfectly fine, but suddenly on one node, one cache-put got stuck with below stack trace. (Cause being blocked on org.jgroups.protocols.FlowControl$Credit.decrementIfEnoughCredits(FlowControl.java:567)).

Now all further puts are getting stuck - blocked - on the same line on the same node. Other nodes are working fine in this respect.

After discussing with rhn-engineering-bban, he has suggested to upgrade to a later version of JGROUPS.
Refer: https://issues.jboss.org/browse/JGRP-2250

Now, we intend to use JGROUPS 3.6.7 or later version with INFINISPAN 6.0.2.

Please suggest on the feasibility of the upgrading JGROUPS.