PK98482; 7.0.0.7: Error due to NoClassDefFoundError loading DeserializationStub

Download Description

PK98482 resolves the following problem:

ERROR DESCRIPTION:
When parsing a JAX-WS SOAP message, the following error is logged in the SystemErr.log file. This occurs when running the webservice as a BLA (business level application) and the JAXB runtime environment is not visible to the application classloader.
.
java.lang.RuntimeException:
java.lang.reflect.InvocationTargetException
at
com.ibm.xml.xlxp2.jaxb.codegen.AbstractGeneratedStubFactory.getS
tubClassConstructor(AbstractGeneratedStubFactory.java:171)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedDeseri
alizationStubFactory.createStub(AbstractGeneratedDeserialization
StubFactory.java:58)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.sta
rtComplexType(DeserializationContext.java:660)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.han
dleRootElementEvent(DeserializationContext.java:303)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.produc
eRootElementEvent(JAXBDocumentScanner.java:186)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanRootElement(DocumentS
canner.java:2234)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanProlog(DocumentScanne
r.java:1726)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.nextEvent(DocumentScanner
.java:1316)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.parseDocumentEntity(Docum
entScanner.java:1168)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.unmars
hal(JAXBDocumentScanner.java:125)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.UnmarshallerImpl.unmarshal(Unma
rshallerImpl.java:120)

...
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
Impl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
AccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at
com.ibm.xml.xlxp2.jaxb.codegen.AbstractGeneratedStubFactory$Clas
sLoaderMethods.defineClass(AbstractGeneratedStubFactory.java:323
)
at
com.ibm.xml.xlxp2.jaxb.codegen.AbstractGeneratedStubFactory$Clas
sLoaderMethods.defineClass(AbstractGeneratedStubFactory.java:317
)
at
com.ibm.xml.xlxp2.jaxb.codegen.AbstractGeneratedStubFactory.getS
tubClassConstructor(AbstractGeneratedStubFactory.java:155)
... 20 more

Caused by: java.lang.NoClassDefFoundError:
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub
at java.lang.ClassLoader.defineClassImpl(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:265)
at java.lang.ClassLoader.defineClass(ClassLoader.java:202)
... 27 more

Caused by: java.lang.ClassNotFoundException:
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(
BundleLoader.java:402)
at
org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(
BundleLoader.java:347)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadCla
ss(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
... 30 more

LOCAL FIX:
Add the jars to the application or create a WebSphere Application Server shared library to point to them.

PROBLEM SUMMARY

USERS AFFECTED:
All IBM WebSphere Application Server V7.0 users of JAX-WS or JAXB.

PROBLEM DESCRIPTION:
RuntimeException error occurs indicating a NoClassDefFoundError loading DeserializationStub

RECOMMENDATION:
Install a fix pack that contains this APAR.

When a customer uses the JAXB API, uses JAX-WS web services, or uses another stack product that uses JAXB, a RuntimeException may occur.

Here is an example error:

java.lang.RuntimeException:
java.lang.reflect.InvocationTargetException
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedStubFa
ctory.getStubClassConstructor(AbstractGeneratedStubFactory.java:
153)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedStubFa
ctory.createStub(AbstractGeneratedStubFactory.java:84)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.sta
rtComplexType(DeserializationContext.java:646)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.han
dleRootElementEvent(DeserializationContext.java:298)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.produc
eRootElementEvent(JAXBDocumentScanner.java:186)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanRootElement(DocumentS
canner.java:2234)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanProlog(DocumentScanne
r.java:1726)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.nextEvent(DocumentScanner
.java:1316)
at
com.ibm.xml.xlxp2.scan.DocumentScanner.parseDocumentEntity(Docum
entScanner.java:1168)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.unmars
hal(JAXBDocumentScanner.java:147)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.UnmarshallerImpl.unmarshal(Unma
rshallerImpl.java:158)
...
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
Impl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
AccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:599)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedStubFa
ctory$ClassLoaderMethods.defineClass(AbstractGeneratedStubFactor
y.java:344)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedStubFa
ctory$ClassLoaderMethods.defineClass(AbstractGeneratedStubFactor
y.java:338)
at
com.ibm.xml.xlxp2.jaxb.unmarshal.codegen.AbstractGeneratedStubFa
ctory.getStubClassConstructor(AbstractGeneratedStubFactory.java:
137)
... 11 more
Caused by: java.lang.NoClassDefFoundError:
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub
at java.lang.ClassLoader.defineClass
(ClassLoader.java:265)
at java.lang.ClassLoader.defineClass
(ClassLoader.java:202)
... 18 more
Caused by: java.lang.ClassNotFoundException:
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub
at
java.lang.ClassNotFoundException.<init>(ClassNotFoundException.j
ava:65)
at java.net.URLClassLoader.findClass
(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:345)
at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
at java.lang.ClassLoader.defineClassImpl(Native Method)
... 20 more

The error indicates that the JAXB Unmarshaller API does not have access to some of the classes that are part of the JAXB implementation.

PROBLEM CONCLUSION:
The JAXB Unmarshaller generates code which requires that the application's ClassLoader has access to classes which are part of the JAXB implementation. But there are environments such as those which use OSGi where this requirement cannot be satisfied. To allow JAXB applications to work in such environments the implementation was fixed so that when the ClassLoader does not have access to the JAXB implementation classes an alternate path through the Unmarshaller is taken.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.9. Please refer to the Recommended Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980