[jboss-jira] [JBoss JIRA] Resolved: (JGRP-896) GMS: ConcurrentModificationException in AckCollector.handleView()

GMS: ConcurrentModificationException in AckCollector.handleView() ----------------------------------------------------------------- Key: JGRP-896 URL: https://jira.jboss.org/jira/browse/JGRP-896 Project: JGroups Issue Type: Bug Affects Versions: 2.6.5 Reporter: Philippe Julien Assignee: Bela Ban Fix For: 2.6.8, 2.8 We encountered the following CME exception on one of our production environment: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.remove(HashMap.java:860) at java.util.AbstractCollection.retainAll(AbstractCollection.java:393) at org.jgroups.util.AckCollector.handleView(AckCollector.java:85) at org.jgroups.protocols.pbcast.GMS.installView(GMS.java:479) at org.jgroups.protocols.pbcast.CoordGmsImpl.handleViewChange(CoordGmsImpl.java:460) at org.jgroups.protocols.pbcast.GMS.up(GMS.java:711) at org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:192) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:233) at org.jgroups.protocols.UNICAST.up(UNICAST.java:299) at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:861) at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:693) at org.jgroups.protocols.BARRIER.up(BARRIER.java:136) at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167) at org.jgroups.protocols.FD_ALL.up(FD_ALL.java:203) at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:308) at org.jgroups.protocols.MERGE2.up(MERGE2.java:144) at org.jgroups.protocols.Discovery.up(Discovery.java:263) at org.jgroups.protocols.TP.passMessageUp(TP.java:1275) at org.jgroups.protocols.TP.access$100(TP.java:49) at org.jgroups.protocols.TP$1.run(TP.java:1178) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) at java.lang.Thread.run(Thread.java:595)