[AMQ-1971] ConcurrentModificationException in high volume broker

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.2.0
• Fix Version/s: 5.2.0
• Component/s: Broker
• Assignee: Robert Davies
• Reporter: Jayson Minard
• Created: 08/Oct/08 18:42
• Updated: 06/Nov/08 10:47
• Resolved: 13/Oct/08 08:57

Description

This is occurring in the thousands as messages come through. We have a network of 5 brokers although they do most of their work internally (publisher/consumer for queue are only on same broker) and do less work crossing to a central broker.

java.util.ConcurrentModificationException
at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:392)
at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:391)
at org.apache.activemq.broker.region.cursors.AbstractStoreCursor.next(AbstractStoreCursor.java:136)
at org.apache.activemq.broker.region.cursors.StoreQueueCursor.next(StoreQueueCursor.java:140)
at org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1178)
at org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1290)
at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1004)
at org.apache.activemq.thread.DeterministicTaskRunner.runTask(DeterministicTaskRunner.java:84)
at org.apache.activemq.thread.DeterministicTaskRunner$1.run(DeterministicTaskRunner.java:41)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)