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

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 >