[JBoss JIRA] Created: (JBMESSAGING-1707) ConcurrentModificationException in ClientClusteredConnectionFactoryDelegate
by Pavel Slavicek (JIRA)
ConcurrentModificationException in ClientClusteredConnectionFactoryDelegate
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Key: JBMESSAGING-1707
URL: https://jira.jboss.org/jira/browse/JBMESSAGING-1707
Project: JBoss Messaging
Issue Type: Quality Risk
Components: JMS Client Manager
Affects Versions: 1.4.3.GA
Reporter: Pavel Slavicek
Assignee: Tim Fox
I have found ConcurrentModificationException in ClientClusteredConnectionFactoryDelegate.
Exception in thread "Thread-11" java.util.ConcurrentModificationException
at java.util.WeakHashMap$HashIterator.nextEntry(WeakHashMap.java:784)
at java.util.WeakHashMap$KeyIterator.next(WeakHashMap.java:817)
at org.jboss.jms.client.delegate.ClientClusteredConnectionFactoryDelegate$FinalizerShutdownHook.run(ClientClusteredConnectionFactoryDelegate.java:414)
Client:
client with multiple threads, every thread creates-sends-receives-closes.
Problem description:
Problem is in the ClientClusteredConnectionFactoryDelegate.java in the inner class FinalizerShutdownHook.
Shutdown hook implementation should to be written as thread safe (see javadoc for addShutdownHook() method).
Method run() in the FinalizerShutdownHook class iterates over all elements in the registered delegates
but this iteration should be synchronized on the delegates object.
Please see http://java.sun.com/javase/6/docs/api/java/util/Collections.html#synchron...
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12 years, 2 months