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Problem with sdo in OSGi bundle (classloader?) [message #503053] Thu, 10 December 2009 12:04 Go to next message
Eclipse UserFriend
Hi all,

we habe a big issue with eclipselink sdo in spring dm server (2.0.0M6). The deployment of eclipselink an related artifacts runs without problems. We can deploy our classes, too. But if we run an test the application crashes.

We've got a single service (OSGi bundle), which handels all SDO operations (create, serialize, etc.). This bundle uses SDOHelperContext to create the SDO context:

import org.eclipse.persistence.sdo.helper.SDOHelperContext;
import commonj.sdo.helper.HelperContext;

private HelperContext scope;

public HelperContext getScope() {
	if(this.scope == null){
		this.scope =  new SDOHelperContext();
	}
	return scope;
}


If we call this OSGi bundle, the application crashes. This looks for me like a classloader issue, because the classloader is looking for org.eclipse.persistence.sdo.SDODataObject in one of our bundles. It seems, if he tries to use the classloader of this bundle and can't (of course) find the SDO class. Here is the complete stacktrace:

[2009-12-10 17:48:01.721] ltMessageListenerContainer-1 org.springframework.jms.listener.DefaultMessageListenerContainer  Execution of JMS message listener failed, and no ErrorHandler has been set. java.lang.NoClassDefFoundError: org/eclipse/persistence/sdo/SDODataObject
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:637)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:482)
	at org.eclipse.persistence.sdo.helper.SDOClassLoader.createGeneric(SDOClassLoader.java:99)
	at org.eclipse.persistence.sdo.helper.SDOClassLoader.loadClass(SDOClassLoader.java:72)
	at org.eclipse.persistence.sdo.SDOType.getInstanceClass(SDOType.java:151)
	at org.eclipse.persistence.sdo.types.SDOWrapperType.<init>(SDOWrapperType.java:79)
	at org.eclipse.persistence.sdo.types.SDOWrapperType.<init>(SDOWrapperType.java:59)
	at org.eclipse.persistence.sdo.helper.delegates.SDOTypeHelperDelegate.initWrapperTypes(SDOTypeHelperDelegate.java:143)
	at org.eclipse.persistence.sdo.helper.delegates.SDOTypeHelperDelegate.<init>(SDOTypeHelperDelegate.java:131)
	at org.eclipse.persistence.sdo.helper.SDOHelperContext.initialize(SDOHelperContext.java:123)
	at org.eclipse.persistence.sdo.helper.SDOHelperContext.<init>(SDOHelperContext.java:114)
	at org.eclipse.persistence.sdo.helper.SDOHelperContext.<init>(SDOHelperContext.java:104)
	at com.catify.core.sdo.internal.services.impl.SdoServiceImpl.getScope(SdoServiceImpl.java:111)
	at com.catify.core.sdo.internal.services.impl.SdoServiceImpl.registerXmlSchema(SdoServiceImpl.java:35)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:616)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at $Proxy270.registerXmlSchema(Unknown Source)
	at com.catify.test.adapter.ws.internal.WebserviceAdapterCall.call(WebserviceAdapterCall.java:46)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:616)
	at org.apache.camel.component.bean.MethodInfo.invoke(MethodInfo.java:193)
	at org.apache.camel.component.bean.MethodInfo$1.proceed(MethodInfo.java:115)
	at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:122)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:61)
	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:61)
	at org.apache.camel.processor.RedeliveryErrorHandler.processExchange(RedeliveryErrorHandler.java:186)
	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:155)
	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:88)
	at org.apache.camel.processor.DefaultErrorHandler.process(DefaultErrorHandler.java:49)
	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:148)
	at org.apache.camel.processor.UnitOfWorkProcessor.processNext(UnitOfWorkProcessor.java:54)
	at org.apache.camel.processor.DelegateProcessor.process(DelegateProcessor.java:48)
	at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:83)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:559)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:498)
	at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:467)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:976)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:968)
	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:870)
	at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.ClassNotFoundException: org.eclipse.persistence.sdo.SDODataObject not found from bundle [com.catify.test.adapter.ws]
	at org.springframework.osgi.util.BundleDelegatingClassLoader.findClass(BundleDelegatingClassLoader.java:103)
	at org.springframework.osgi.util.BundleDelegatingClassLoader.loadClass(BundleDelegatingClassLoader.java:156)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
	at org.eclipse.persistence.sdo.helper.SDOClassLoader.loadClass(SDOClassLoader.java:51)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)
	... 60 common frames omitted
Caused by: com.springsource.kernel.osgi.framework.ExtendedClassNotFoundException: org.eclipse.persistence.sdo.SDODataObject in KernelBundleClassLoader: [bundle=com.catify.test.adapter.ws_1.0.0.SNAPSHOT]
	at com.springsource.kernel.osgi.framework.equinox.KernelBundleClassLoader.loadClass(KernelBundleClassLoader.java:145)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
	at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:326)
	at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:231)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1193)
	at org.springframework.osgi.util.BundleDelegatingClassLoader.findClass(BundleDelegatingClassLoader.java:99)
	... 64 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.eclipse.persistence.sdo.SDODataObject
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:494)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:398)
	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)
	at com.springsource.kernel.osgi.framework.equinox.KernelBundleClassLoader.loadClass(KernelBundleClassLoader.java:141)
	... 69 common frames omitted


Any help is welcome. Thanks in advance!

Claus

[Updated on: Thu, 10 December 2009 12:06] by Moderator

Re: Problem with sdo in OSGi bundle (classloader?) [message #505769 is a reply to message #503053] Mon, 04 January 2010 15:41 Go to previous message
Eclipse UserFriend
Hi Claus,

I'm sorry I missed your posting but I hope my comments are still useful.

You should be using the constructor for SDOHelperContext that takes a classloader to ensure that all of your domain classes, schemas, and XML documents are visible in the context. In OSGi, the bundle itself is an ideal candidate as it provides classloader-like API and can be adapted [1]. EclipseLink uses this technique in JPA.

Unfortunately, in reproducing your problem we discovered another problem [2] which we fortunately have a fix for and which will be available in a nightly build as soon as it is promoted.

--Shaun

[1] http://wiki.eclipse.org/index.php/BundleProxyClassLoader_rec ipe
[2] https://bugs.eclipse.org/298792
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