[jboss-jira] [JBoss JIRA] Resolved: (JGRP-754) FC: ConcurrentModificationException in handleViewChange()

FC: ConcurrentModificationException in handleViewChange() --------------------------------------------------------- Key: JGRP-754 URL: http://jira.jboss.com/jira/browse/JGRP-754 Project: JGroups Issue Type: Bug Affects Versions: 2.6.2 Reporter: Philippe Julien Assigned To: Bela Ban Fix For: 2.6.3, 2.7 FC can throw a ConcurrentModificationException on a view change. The following code is not correct: for(Address creditor: creditors) { if(!mbrs.contains(creditor)) creditors.remove(creditor); } To fix it replace it with something like that: for(Iterator<Address> it=creditors.iterator(); it.hasNext();) { Address creditor = (Address)it.next(); if(!mbrs.contains(creditor)) it.remove(); } Here is the exception: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841) at java.util.HashMap$KeyIterator.next(HashMap.java:877) at org.jgroups.protocols.FC.handleViewChange(FC.java:791) at org.jgroups.protocols.FC.up(FC.java:422) at org.jgroups.protocols.pbcast.GMS.installView(GMS.java:500) at org.jgroups.protocols.pbcast.CoordGmsImpl.handleViewChange(CoordGmsImpl.java:430) at org.jgroups.protocols.pbcast.GMS.up(GMS.java:663) at org.jgroups.protocols.VIEW_SYNC.up(VIEW_SYNC.java:193) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234) at org.jgroups.protocols.UNICAST.up(UNICAST.java:293) at org.jgroups.protocols.pbcast.NAKACK.handleMessage(NAKACK.java:858) at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:687) 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.up(FD.java:285) at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:308) at org.jgroups.protocols.MERGE2.up(MERGE2.java:145) at org.jgroups.protocols.Discovery.up(Discovery.java:245) at org.jgroups.protocols.TP.passMessageUp(TP.java:1132) at org.jgroups.protocols.TP.access$100(TP.java:48) at org.jgroups.protocols.TP$1.run(TP.java:1035) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) at java.lang.Thread.run(Thread.java:595)