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.
Please suggest on the feasibility of the upgrading JGROUPS.