Re: CursorableLinkedList ConcurrentModificationException

[Rodney Waldhoff <rw...@apache.org>]

If I remember correctly, there was once a bug along these lines triggered
by certain evictions of the prepared statement pool that was addressed in
either the pool or dbcp component.  Looking through the cvs logs quickly I
wasn't able to see it, but you may want to give a recent nightly build a
try.

On Fri, 28 Feb 2003, Lee Breisacher wrote:

> I just ran into this error:
>
> java.util.ConcurrentModificationException
>  	at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:444)
>  	at java.util.AbstractList$Itr.next(AbstractList.java:421)
> 	at
> org.apache.commons.collections.CursorableLinkedList.broadcastListableInserte
> d(Unknown Source)
>  	at
> org.apache.commons.collections.CursorableLinkedList.insertListable(Unknown
> Source)
>  	at
> org.apache.commons.collections.CursorableLinkedList.addFirst(Unknown Source)
>  	at
> org.apache.commons.pool.impl.GenericObjectPool.returnObject(Unknown Source)
>
> Unfortunately, I do not have stack traces for the other threads that were
> running, so I don't know what some other thread must have been doing to
> cause this. But, looking at GenericObjectPool, it appears to be properly
> synchronized at all the places that operate on the CursorableLinkedList (its
> _pool variable), so I don't quite understand how this error can occur.
> Anyway, does this look like a bug in CursorableLinkedList?  Has anyone seen
> this before and know of a fix/workaround?
>
> Thanks,
>
> Lee
>

Re: CursorableLinkedList ConcurrentModificationException

[Rodney Waldhoff <rw...@apache.org>]

By "recent nightly build", I mean of both commons-pool and commons-dbcp,
by the way.

On Mon, 3 Mar 2003, Rodney Waldhoff wrote:

> If I remember correctly, there was once a bug along these lines triggered
> by certain evictions of the prepared statement pool that was addressed in
> either the pool or dbcp component.  Looking through the cvs logs quickly I
> wasn't able to see it, but you may want to give a recent nightly build a
> try.
>