looks like an obivious multi threading issue. I'll look into it a bit.

On Tue, Feb 3, 2009 at 9:58 AM, Pierre Henri Kuate <[email protected]>wrote:

>
> Hi all,
>
> I have access to a 8-core workstation and I use it to stress test my
> project.
> I noticed that the concurrency tests in NHibernate.Search sometimes
> fail with the following exception:
>
> System.InvalidOperationException: Collection was modified; enumeration
> operation may not execute.
>   at System.Collections.Hashtable.HashtableEnumerator.MoveNext()
>   at NHibernate.Util.WeakHashtable.Scavenge() in C:\Dev\NHibernate
> \NHibernate\Util\WeakHashtable.cs:line 150
>   at NHibernate.Util.WeakHashtable.set_Item(Object key, Object value)
> in C:\Dev\NHibernate\NHibernate\Util\WeakHashtable.cs:line 198
>   at NHibernate.Search.Backend.Impl.TransactionalWorker.PerformWork
> (Work work, ISessionImplementor session) in C:\Dev\NHibernate
> \NHibernate.Search\Backend\Impl\TransactionalWorker.cs:line 28
>   at NHibernate.Search.Event.FullTextIndexEventListener.ProcessWork
> (Object entity, Object id, WorkType workType, AbstractEvent e) in C:
> \Dev\NHibernate\NHibernate.Search\Event
> \FullTextIndexEventListener.cs:line 54
>   at NHibernate.Search.Event.FullTextIndexEventListener.OnPostUpdate
> (PostUpdateEvent e) in C:\Dev\NHibernate\NHibernate.Search\Event
> \FullTextIndexEventListener.cs:line 94
>   at NHibernate.Action.EntityUpdateAction.PostUpdate() in C:\Dev
> \NHibernate\NHibernate\Action\EntityUpdateAction.cs:line 172
>   at NHibernate.Action.EntityUpdateAction.Execute() in C:\Dev
> \NHibernate\NHibernate\Action\EntityUpdateAction.cs:line 128
>   at NHibernate.Engine.ActionQueue.Execute(IExecutable executable) in
> C:\Dev\NHibernate\NHibernate\Engine\ActionQueue.cs:line 130
>   at NHibernate.Engine.ActionQueue.ExecuteActions(IList list) in C:
> \Dev\NHibernate\NHibernate\Engine\ActionQueue.cs:line 113
>   at NHibernate.Engine.ActionQueue.ExecuteActions() in C:\Dev
> \NHibernate\NHibernate\Engine\ActionQueue.cs:line 147
>   at
> NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions
> (IEventSource session) in C:\Dev\NHibernate\NHibernate\Event\Default
> \AbstractFlushingEventListener.cs:line 241
>   at NHibernate.Event.Default.DefaultFlushEventListener.OnFlush
> (FlushEvent event) in C:\Dev\NHibernate\NHibernate\Event\Default
> \DefaultFlushEventListener.cs:line 19
>   at NHibernate.Impl.SessionImpl.Flush() in C:\Dev\NHibernate
> \NHibernate\Impl\SessionImpl.cs:line 1215
>   at NHibernate.Transaction.AdoTransaction.Commit() in C:\Dev
> \NHibernate\NHibernate\Transaction\AdoTransaction.cs:line 177
>   at NHibernate.Search.Tests.Worker.WorkerTestCase.ReverseWork(Object
> state) in C:\Dev\NHibernate\NHibernate.Search.Tests\Worker
> \WorkerTestCase.cs:line 216
>
>
> Note that it also occurs on my Core 2 Duo, but far less often.
>
> Have you ever experienced this issue? Any suggestions on how to fix it?
> >
>

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