[ http://jira.jboss.com/jira/browse/JBAS-1664?page=history ]
Adrian Brock closed JBAS-1664:
------------------------------
Resolution: Won't Fix
You mean OutOfMemoryError.
In general such errors leave the JVM in an unknown/unrecoverable state.
The main difference between BMP and CMP is that by default BMP uses
commit option A with a 1 million bean cache per EJB deployment,
which is unlikely to work if you have the default 64M of memory.
> Unloaded entities returned in low memory conditions
> ---------------------------------------------------
>
> Key: JBAS-1664
> URL: http://jira.jboss.com/jira/browse/JBAS-1664
> Project: JBoss Application Server
> Type: Bug
> Components: EJBs
> Versions: JBossAS-3.2.6 Final
> Reporter: Arto Huusko
>
>
> In low memory conditions (that is, when OutOfMemoryExceptions are seen
> frequently all over the place), JBoss can behave wrong in a way that is
> critically wrong.
> I have seen on several occasions that a finder returns an entity with the
> correct identity, but where ejbLoad() has either not been called at all, or
> where ejbLoad() has failed at some point (I have no way of knowing which is
> the case).
> I have observed this behaviour only with BMP beans (and so there is a
> possibility that I am doing something wrong in the BMP code, but I doubt
> this). However, the fact that I haven't seen this with CMP beans may be just
> because CMP beans work differently, or just plain luck. When this occurs, the
> wrong behaviour can be seen because the instance variables of the entity bean
> contain what ever they had when the entity instance was previously attached
> to some other identity.
> For example, I may store the primary key of the entity in some instance
> variable. Let's say I can access the primary key via method "Long
> getMyPrimaryKey()". If the finder returns an entity with the correct identity
> (what I asked for in the finder call), but where ejbLoad() is not called or
> it fails, then
> entity.getMyPrimaryKey().equals(entity.getPrimaryKey())
> is false. And this is exactly what I have seen.
> I have no idea where the problem is, and, as I said above, it may be a
> problem with my code.
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