PM20455: A MarshalException error occurs when a null object is used as an argument to a java.util.List parameter on a JAX-WS web

Fixes are available

APAR status

Closed as program error.

Error description

A javax.xml.bind.MarshalException error may occur when a null
object is used as an argument to a java.util.List parameter on
a JAX-WS web method.

For example, if the JAX-WS Web services has the following web
method:

@WebMethod;
java.util.List<String> echo(java.util.List<String> in);

If the JAX-WS client application uses a null object when
calling the echo method, the invocation may fail with a
MarshalException error

Or if the JAX-WS Web service implementation returns a null
object from the echo method, the invocation may fail with a
MarshalException error.

In both cases, the MashalException will indicate that
"java.util.List is not known to this context".

Here is an example error:

javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: java.util.List is not known to
this context]

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  IBM WebSphere Application Server V7.0 users *
*                  of JAX-WS                                   *
****************************************************************
* PROBLEM DESCRIPTION: A MarshalException error occurs when    *
*                      a null object is used as an argument    *
*                      to a java.util.List parameter on a      *
*                      JAX-WS web method.                      *
****************************************************************
* RECOMMENDATION:  Install a fix pack containing this APAR     *
****************************************************************
A javax.xml.bind.MarshalException error may occur when a null
object is used as an argument to a java.util.List parameter on
a JAX-WS web method.

For example, if the JAX-WS Web services has the following web
method:

   @WebMethod;
   java.util.List<String> echo(java.util.List<String> in);

If a the JAX-WS client application uses a null object when
calling the echo method, the invocation may fail with a
MarshalException error

Or if the JAX-WS Web service implementation returns a null
object from the echo method, the invocation may fail with a
MarshalException error.

In both cases, the MashalException will indicate that
"java.util.List is not known to this context".

Here is an example error:

javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: java.util.List is not known to
this context]

This problem will only occur if the Web service uses the
Document/Literal Wrapped style (as defined by the JAX-WS
specification) and the web method does not have
@RequestWrapper and @ResponseWrapper annotations.

Problem conclusion

The JAX-WS runtime was expecting users to pass a valid
java.util.List argument to the web method.

The JAX-WS runtime is changed to accept a null object.  The
JAX-WS runtime will interpret a null object as a
java.util.List containing no objects.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.15.  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
PM20455
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
700
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-08-12
Closed date
2010-08-19
Last modified date
2010-08-19

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
WEBS APP SERV N
Fixed component ID
5724H8800

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

PM20455: A MarshalException error occurs when a null object is used as an argument to a java.util.List parameter on a JAX-WS web

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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