FD_SOCK.interruptPingerThread() can cause NPEs ---------------------------------------------- Key: JGRP-239 URL: http://jira.jboss.com/jira/browse/JGRP-239 Project: JGroups Issue Type: Bug Affects Versions: 2.3, 2.2.9.2, 2.2.9.1, 2.2.9, 2.2.8 Reporter: Bela Ban Assigned To: Bela Ban Fix For: 2.4 [email from Bruce Schuchardt] I doubt that I could reproduce it, but one of our apps ran into a NPE in FD_SOCK.interruptPingerThread on this line if(pinger_thread != null && pinger_thread.isAlive()) { This was during the passing down of a new view from pbcast.GMS.installView. It looks like some synchronization is needed for this check in a few places in FD_SOCK.