PM37821: OPENJPA DOESN'T FIND VALUEHANDLER AND/OR FIELDSTRATEGY CLASS WITH AN APPLICABLE CLASS LOADER

Fixes are available

APAR status

Closed as program error.

Error description

Issue making the openJpa work with WAS 6.1.0.31 + EJB3 feature
pack.

See the error thrown below:

[08/04/11 15:53:37:514 UTC] 00000020 SystemOut     O

<openjpa-1.0.4-SNAPSHOT-r420667:908274 fatal user error>
org.apache.openjpa.persistence.ArgumentException: The type for
"test.aaa.bbb" is mapped to custom
strategy"test.DecimalWrapperValueHandler", but this strategy
cannot beinstantiated.
at
org.apache.openjpa.jdbc.meta.MappingRepository.mappedStrategy(Ma
ppingRepository.java:953)
at
org.apache.openjpa.jdbc.meta.MappingRepository.defaultStrategy(M
appingRepository.java:750)

::::::::::::::


Caused by: <openjpa-1.0.4-SNAPSHOT-r420667:908274 fatal user
error>
org.apache.openjpa.persistence.ArgumentException: The class name
"test.DecimalWrapperValueHandler" used in a metadata extension
on field"test.aaa.bbb" is not valid.
at
org.apache.openjpa.meta.JavaTypes.classForName(JavaTypes.java:22
7)
at
org.apache.openjpa.meta.JavaTypes.classForName(JavaTypes.java:19
4)

Local fix

```
candidate to be fixed in next release
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V7.0.0 and V8.0.0 who use an         *
*                  OpenJPA                                     *
*                  ValueHandler or FieldStrategy.              *
****************************************************************
* PROBLEM DESCRIPTION: OpenJPA doesn't find a ValueHandler     *
*                      and/or FieldStrategy class with an      *
*                      applicable class loader.                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When a user's JPA entities makes use of (implement) an OpenJPA
'org.apache.openjpa.jdbc.meta.ValueHandler' or
'org.apache.openjpa.jdbc.meta.FieldStrategy', a potential
exists for said classes/implementation to not be found by the
current classloader.  That is, take the following code as an
example:
package test;
@Entity
public class TestEntity {
@Id
private Long id;
@Persistent
@Strategy("test.MyStringValueHandler")
private String testString;
.....
package test;
public class MyStringValueHandler extends
org.apache.openjpa.jdbc.meta.strats.AbstractValueHandler {
.....
When OpenJPA attempts to load the 'MyStringValueHandler'
class (the class listed in the @Strategy annotation), it may
not be able to load the class depending on the classloader in
use.  In this case OpenJPA is attempting to load the class
with the wrong classloader.  Thus the following exception
results:
org.apache.openjpa.persistence.ArgumentException: The type for
"test.TestEntity.testString" is mapped to custom
strategy "test.MyStringValueHandler", but this strategy
cannot beinstantiated.

Problem conclusion

With this fix, code has been added to ensure that OpenJPA uses
the correct classloader when it attempts to load a class
which has implemented a 'ValueHandler' or 'FieldStrategy'
interface.

The fix for this APAR is currently targeted for
inclusion in Service Levels (Fix Packs) 7.0.0.21 and 8.0.0.2 of
WebSphere Application Server versions 7.0.0 and 8.0.0.
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
PM37821
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
61A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-04-26
Closed date
2011-08-12
Last modified date
2011-09-02

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

PM41571 PM41573

Fix information

Fixed component name
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R700 PSY
UP
R800 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":"6.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
27 October 2021

Tips

PM37821: OPENJPA DOESN'T FIND VALUEHANDLER AND/OR FIELDSTRATEGY CLASS WITH AN APPLICABLE CLASS LOADER

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

R800 PSY

Document Information

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