PK96876: CLASSCASTEXCEPTION OCCURS IN JAXB RUNTIME WHILE UNMARSHALLING A DOCUMENT

Fixes are available

APAR status

Closed as program error.

Error description

A ClassCastException may occur while unmarshalling a document
containing values for an element wildcard.

Sample stack trace:

java.lang.ClassCastException: example.ExampleType1
incompatible with example.ExampleType2
 at example.Example_JAXB_Deserialization_Stub.write0(example.
  Example_JAXB_Deserialization_Stub.java)
 at example.Example_JAXB_Deserialization_Stub.write(example.
  Example_JAXB_Deserialization_Stub.java)
 at com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub.
  end(DeserializationStub.java:151)
 at
          com.ibm.xml.xlxp2.jaxb.unmarshal.impl.
              DeserializationContext.
              endComplexType(DeserializationContext.java:673)
 at
          com.ibm.xml.xlxp2.jaxb.unmarshal.impl.
              DeserializationContext.
  handleEndElementEvent(DeserializationContext.java:384)
 at com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.
  produceEndElementEvent(JAXBDocumentScanner.java:234)
 at com.ibm.xml.xlxp2.scan.DocumentScanner.scanEndElement
  (DocumentScanner.java:2711)
 at com.ibm.xml.xlxp2.scan.DocumentScanner.scanMarkup
  (DocumentScanner.java:2186)
 at com.ibm.xml.xlxp2.scan.DocumentScanner.scanElementContent
  (DocumentScanner.java:1978)
 at com.ibm.xml.xlxp2.scan.DocumentScanner.nextEvent
  (DocumentScanner.java:1329)
 at com.ibm.xml.xlxp2.scan.DocumentScanner.parseDocumentEntity
  (DocumentScanner.java:1168)
 at com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.
  unmarshal(JAXBDocumentScanner.java:147)
 at com.ibm.xml.xlxp2.jaxb.unmarshal.UnmarshallerImpl.
              unmarshal(UnmarshallerImpl.java:158)

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All IBM WebSphere Application Server users  *
*                  of JAXB and JAX-WS.                         *
****************************************************************
* PROBLEM DESCRIPTION: Unmarshalling of a document by the      *
*                      IBM JAXB runtime may result in a        *
*                      ClassCastException.                     *
****************************************************************
* RECOMMENDATION:  Install a fix pack that contains this APAR. *
****************************************************************
An application attempting to unmarshal a document containing
values for an element wildcard may get a ClassCastException
from the JAXB runtime, such as the following:

java.lang.ClassCastException: example.ExampleType1
incompatible with example.ExampleType2
 at
example.Example_JAXB_Deserialization_Stub.write0(example.Example
_JAXB_Deserialization_Stub.java)
 at
example.Example_JAXB_Deserialization_Stub.write(example.Example_
JAXB_Deserialization_Stub.java)
 at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationStub.end(De
serializationStub.java:151)
 at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.end
ComplexType(DeserializationContext.java:673)
 at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.han
dleEndElementEvent(DeserializationContext.java:384)
 at
com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.produc
eEndElementEvent(JAXBDocumentScanner.java:234)
 at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanEndElement(DocumentSc
anner.java:2711)
 at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanMarkup(DocumentScanne
r.java:2186)
 at
com.ibm.xml.xlxp2.scan.DocumentScanner.scanElementContent(Docume
ntScanner.java:1978)
 at
com.ibm.xml.xlxp2.scan.DocumentScanner.nextEvent(DocumentScanner
.java:1329)
 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)

Problem conclusion

The JAXB Unmarshaller generates stub classes at runtime to
assist in unmarshalling the document. These generated classes
are cached and may be reused by other JAXBContexts in the
application.

When a JAXBContext contains a class which has an
element wildcard (i.e. @XmlAnyElement) it was possible that
the Unmarshaller would use incompatible generated stub classes
from another JAXBContext which could result in a
ClassCastException being thrown during unmarshalling. The
problem was resolved by improving the collision checking done
on previously generated stub classes so that a new stub class
is generated from the current JAXBContext if the previously
generated stub class found in the cache is not compatible.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.7.  Please refer to the Recommended Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PK96876
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-09-22
Closed date
2009-09-25
Last modified date
2009-09-25

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R700 PSY
UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 October 2021

Tips

PK96876: CLASSCASTEXCEPTION OCCURS IN JAXB RUNTIME WHILE UNMARSHALLING A DOCUMENT

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R700 PSY

Document Information

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