[hibernate-dev] HHH-8310 : WrappedBlob/WrappedClob classloading problem

[Scott Marlow]

On 07/08/2014 05:04 PM, Scott Marlow wrote:
> This sounds similar to https://community.jboss.org/message/879546

I was hoping to hear more feedback from the above link but didn't.  I 
suspect that its a classloader issue with ear sub-deployments having 
Hibernate on their classpath but not the ear top level classloader.


>
> On 07/08/2014 03:53 PM, Gail Badner wrote:
>> HHH-8310 [1] mentions a Spring bug SPR-11125 [2] that results in threads having a different ContextClassLoader (CCL) than their caller. As a result, SerializableBlobProxy.generateProxy() throws IllegalArgumentException because WrappedBlob is not found. The same happens for SerializableClobProxy.generateProxy() because WrappedClob is not found.
>>
>> IIUC, this will be fixed by accessing the ClassLoaderService in Hibernate 5.
>>
>> I'm looking for either a fix or workaround for this in Hibernate 4.2.x and 4.3.x.
>>
>> A) A possible fix for HHH-8310 suggests using the ClassLoader returned by WrappedBlob.class.getClassLoader(). Could this somehow get an unintended ClassLoader?

Good question but this change might impact HHH-8010.  Might be good to 
check with Brett on why OSGi needs to use an alternative classloader 
(which is set in ClassLoaderHelper).

>>
>> B) A workaround is for the caller to initialize ClassLoaderHelper.overridenClassLoader before calling Spring.

I don't think this will work in a multiple deployment environment (e.g. 
WildFly) unless ClassLoaderHelper defaulted to the ORM classloader 
instead of an application level classloader.

>>
>> Which would be more appropriate?
>>
>> Thanks,
>> Gail
>>
>> [1] https://hibernate.atlassian.net/browse/HHH-8310
>> [2] https://jira.spring.io/browse/SPR-11125
>> _______________________________________________
>> hibernate-dev mailing list
>> hibernate-dev at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>>
>
> _______________________________________________
> hibernate-dev mailing list
> hibernate-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/hibernate-dev
>