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?

B) A workaround is for the caller to initialize ClassLoaderHelper.overridenClassLoader before calling Spring. 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(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev

This sounds similar to https://community.jboss.org/message/879546

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?

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

> > 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(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hibernate-dev > _______________________________________________ hibernate-dev mailing list hibernate-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev

From: "Gail Badner" <gbadner(a)redhat.com&gt; To: "Scott Marlow" <smarlow(a)redhat.com&gt; Cc: "hibernate-dev" <hibernate-dev(a)lists.jboss.org&gt; Sent: Tuesday, July 8, 2014 2:40:00 PM Subject: Re: [hibernate-dev] HHH-8310 : WrappedBlob/WrappedClob classloading problem Hi Scott, I believe the classloading problem you mention is the same. Both BlobProxy.getProxyClassLoader() and SerializableBlobProxy.getProxyClassLoader() return ClassLoaderHelper.getContextClassLoader() if non-null. Gail ----- Original Message ----- > From: "Scott Marlow" <smarlow(a)redhat.com&gt; > To: "Gail Badner" <gbadner(a)redhat.com&gt;, "hibernate-dev" > <hibernate-dev(a)lists.jboss.org&gt; > Sent: Tuesday, July 8, 2014 2:19:50 PM > Subject: Re: [hibernate-dev] HHH-8310 : WrappedBlob/WrappedClob > classloading problem > > 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(a)lists.jboss.org > >> https://lists.jboss.org/mailman/listinfo/hibernate-dev > >> > > > > _______________________________________________ > > hibernate-dev mailing list > > hibernate-dev(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/hibernate-dev > > > >