Vsevolod Golovanov created JBSEAM-5078: ------------------------------------------ Summary: Unsynchronized access to conversation entries map Key: JBSEAM-5078 URL: https://issues.jboss.org/browse/JBSEAM-5078 Project: Seam 2 Issue Type: Feature Request Components: Core Affects Versions: 2.3.0.Final Reporter: Vsevolod Golovanov The methods org.jboss.seam.core.ConversationEntries.getConversationEntries() and org.jboss.seam.core.ConversationEntries.getConversationIds() themselves are synchronized, but they still return views of underlying unsynchronized collection, so iterating over such a view could yield ConcurrentModificationException or incorrect results, if the underlying collection is changed at the same time. Example stack: 2013-01-22 10:29:53,862 ERROR [ContainerBase] Session event listener threw exception java.util.ConcurrentModificationException at java.util.HashMap$AbstractMapIterator.checkConcurrentMod(HashMap.java:193) at java.util.HashMap$AbstractMapIterator.makeNext(HashMap.java:198) at java.util.HashMap$KeyIterator.next(HashMap.java:271) at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1017) at org.jboss.seam.contexts.Lifecycle.endSession(Lifecycle.java:284) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira