There is a regression when upgrading from JGroups4 to Jgroups5.

The test scenario https://github.com/radargun/radargun/blob/master/plugins/jgroups36/src/main/java/org/radargun/service/JGroups36Service.java is in JGroups36 and shared with JGroups4 and JGroups5.

The UDP configs are located at:

https://github.com/radargun/radargun/blob/master/plugins/jgroups36/src/main/resources/example/default-jgroups3-udp.xml

https://github.com/radargun/radargun/blob/master/plugins/jgroups42/src/main/resources/example/default-jgroups4-udp.xml

https://github.com/radargun/radargun/blob/master/plugins/jgroups52/src/main/resources/example/default-jgroups5-udp.xml

The RadarGun benchmark file is attached.