PI47094: ClassCastException using a shared JPA module on JPA 2.1

Fixes are available

APAR status

Closed as program error.

Error description

This issue is caused by having the WebModules referencing
one
EJBModule instead of having two WebModules with independent
copies of your EJBModule. To expand further, When you go to
deploy the two web applications, EclipseLink treats war1 and
war2 as having the same exact classes causing some confusion
when EclipseLink is processing the Entity Metadata.

Local fix

Problem summary

****************************************************************
* USERS AFFECTED:  All users of the JPA 2.1 feature of IBM     *
*                  WebSphere Application Server Liberty        *
*                  Profile that require the sharing of a       *
*                  single JPA module for several web modules   *
****************************************************************
* PROBLEM DESCRIPTION: Using a shared JPA module on JPA 2.1    *
*                      will result in a ClassCastExceptions.   *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When using the JPA 2.1 feature, the session names generated
were
not unique if a JPA application is deployed as a shared library
in Liberty profile. Eclipselink uses only the location of the
persistence.xml file to specify their session names. This
resulted in the mixing up of classloaders and would throw a
ClassCastException.

Problem conclusion

With this fix, code has been updated in Eclipselink to generate
unique session names for each web module by appending a special
application id to the session name.

Details tracking the delivery of this update to Eclipselink can
be viewed here:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=475285

The fix for this APAR is currently targeted for inclusion in
fix pack 16.0.0.2.  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
PI47094
Reported component name
LIBERTY PROFILE
Reported component ID
5724J0814
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2015-08-18
Closed date
2015-11-19
Last modified date
2016-06-13

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
LIBERTY PROFILE
Fixed component ID
5724J0814

Applicable component levels

R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI47094: ClassCastException using a shared JPA module on JPA 2.1

Fixes are available

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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

R850 PSY

Document Information

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