Spring Data，EclipseLink和SimpleLoadTimeWeaver； 由不同的ClassLoader加载的域类

Question

I have a project using Spring Data and EclipseLink. When I try to run, I get this.

Caused by: java.lang.IllegalArgumentException: No [ManagedType] was found for the key class [CLASSNAME] in the Metamodel - please verify that the [Managed] class was referenced in persistence.xml using a specific <class>scrumspurs.domain.User</class> property or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element.

When I debug, I can see my domain classes are loaded into the Metamodel. However, they are not equals when the Spring Data repositories are being set up. When I investigated I found that the ones that are loaded in the Metamodel are loaded by org.springframework.instrument.classloading.SimpleInstrumentableClassLoader and the ones being checked are loaded by sun.misc.Launcher$AppClassLoader .

I'm using a SimpleLoadTimeWeaver with EclipseLink just to try to get up and running. Is this supported? Is there something that needs to be done to have this setup work properly?

Answer 1

I had exactly the same problem until I used InstrumentationLoadTimeWeaver. I found answer here: loadTimeWeaver