JGRP-2231 Intermittent NPE in JGroups GMS#up on shutdown
JGRP-2231 Intermittent NPE in JGroups GMS#up on shutdown

pferraro/JGroups,Sanne/JGroups,Sanne/JGroups,rhusar/JGroups,pferraro/JGroups,pferraro/JGroups,rhusar/JGroups,rhusar/JGroups,belaban/JGroups,Sanne/JGroups,belaban/JGroups,belaban/JGroups