Bug 3250 – rare ConcurrentModificationException during subscription

Bug 3250 - rare ConcurrentModificationException during subscription

Summary:

rare ConcurrentModificationException during subscription

Status:	RESOLVED FIXED

Product:	Java WS Core
Component:	globus_wsrf_core
Version:	4.0.0
Platform:	PC Windows XP

Importance:	P3 normal
Target Milestone:	---
Assigned To:	Sam Meder

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2005-05-01 23:56 by Jarek Gawor
Modified:	2005-05-09 01:31 (History)

Attachments
Full stack trace (9.09 KB, text/plain) 2005-05-01 23:57, Jarek Gawor	Details
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Description From Jarek Gawor 2005-05-01 23:56:22

Failed to store resource; nested exception is:   
java.util.ConcurrentModificationException
java.util.ConcurrentModificationException
 at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:440)
 at java.util.AbstractList$Itr.next(AbstractList.java:413)
 at 
org.globus.wsrf.utils.SubscriptionPersistenceUtils.addSubscriptionListenersToTab
le(SubscriptionPersistenceUtils.java:94)
 at org.globus.wsrf.utils.SubscriptionPersistenceUtils.getListenerToTopicsTable
(SubscriptionPersistenceUtils.java:71)
 at 
org.globus.wsrf.utils.SubscriptionPersistenceUtils.storeSubscriptionListeners
(SubscriptionPersistenceUtils.java:45)
 at org.globus.wsrf.impl.notification.NotificationTestResource.store
(NotificationTestResource.java:189)
 at org.globus.wsrf.impl.notification.SubscribeHelper.subscribe
(SubscribeHelper.java:426)
 at org.globus.wsrf.impl.notification.SubscribeProvider.subscribe
(SubscribeProvider.java:97)
 at org.apache.axis.providers.java.RPCProvider.invokeMethod
(RPCProvider.java:384)

------- Comment #1 From Jarek Gawor 2005-05-01 23:57:05 -------

Created an attachment (id=600) [details]
Full stack trace

------- Comment #2 From Sam Meder 2005-05-02 08:44:03 -------

Hmm, looks like the stuff in persistent subscription utils is not sufficiently
synchronized wrt both 
adding new topics and adding/removing subscription listeners. I will take a
look at this.

/Sam

------- Comment #3 From Jarek Gawor 2005-05-02 13:09:34 -------

I committed a fix (hopefully) that should take care of Topic listener 
concurency issues. However, there still might be an issue with concurency of 
adding/removing/iterating over Topics. I don't think we have real tests for it.

------- Comment #4 From Jarek Gawor 2005-05-09 01:31:29 -------

Since the ConcurrentModificationException fix appears to be working, I'm 
closing the bug. The Topic concurrency issues can be tracked in another bug.