PM97510: Stackoverflow in OpenJPA due to endless recursive calls in 'isLoaded'

Fixes are available

APAR status

Closed as program error.

Error description

https://issues.apache.org/jira/browse/OPENJPA-2330 issue seen
in WebSphere Application Server V8.5.0.2.

Local fix

```
no work around at this time.
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V8.0.0, V8.5.0, and V8.5.5.          *
****************************************************************
* PROBLEM DESCRIPTION: Stackoverflow in OpenJPA due to         *
*                      endless recursive calls in 'isLoaded'.  *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Take the following entities:
public class EntityA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@OneToMany(fetch = FetchType.EAGER, mappedBy = "center",
orphanRemoval = true, cascade = CascadeType.ALL)
@OrderColumn
private Set<EntityB> services = new
LinkedHashSet<EntityB>();
.........
public class EntityB {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@ManyToOne(cascade = { CascadeType.DETACH,
CascadeType.MERGE, CascadeType.PERSIST })
private EntityA center;
@OneToMany(fetch = FetchType.EAGER, mappedBy = "service",
cascade = CascadeType.ALL, orphanRemoval = true)
@OrderColumn
private Set<EntityC> linacs;
.........
@Entity(name="oaopeEntityC")
public class EntityC {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
protected long id;
@ManyToOne(cascade = { CascadeType.DETACH,
CascadeType.MERGE, CascadeType.PERSIST })
private EntityB service;
.........
With these entites, take the following test case:
EntityManager em = emf.createEntityManager();
EntityA a = new EntityA();
EntityB b = new EntityB(a);
// set back pointer
a.getBs().add(b);
EntityC c = new EntityC(b);
// set back pointer
b.getCs().add(c);
em.persist(a);
em.persist(b);
em.persist(c);
assertEquals(LoadState.LOADED,
OpenJPAPersistenceUtil.isLoaded(b, "center"));
The 'isLoaded' method may cause the following exception:
Exception in thread "AWT-EventQueue-0"
java.lang.StackOverflowError
at
java.util.LinkedHashMap$KeyIterator.<init>(LinkedHashMap.java:38
3)
at
java.util.LinkedHashMap$KeyIterator.<init>(LinkedHashMap.java:38
3)
at
java.util.LinkedHashMap.newKeyIterator(LinkedHashMap.java:396)
at java.util.HashMap$KeySet.iterator(HashMap.java:874)
at java.util.HashSet.iterator(HashSet.java:153)
at
org.apache.openjpa.util.java$util$LinkedHashSet$proxy.iterator(U
nknown Source)
at
java.util.AbstractCollection.toArray(AbstractCollection.java:120
)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedCo
llection(OpenJPAPersistenceUtil.java:240)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:212)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedAr
ray(OpenJPAPersistenceUtil.java:265)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedCo
llection(OpenJPAPersistenceUtil.java:242)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:212)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:223)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:223)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedAr
ray(OpenJPAPersistenceUtil.java:265)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedCo
llection(OpenJPAPersistenceUtil.java:242)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:212)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoadedFi
eld(OpenJPAPersistenceUtil.java:223)
at
org.apache.openjpa.persistence.OpenJPAPersistenceUtil.isLoaded(O
penJPAPersistenceUtil.java:161)
[...]

Problem conclusion

With this fix, code has been added to OpenJPA to avoid a
java.lang.StackOverflowError in the 'isLoaded' method.

The fix for this APAR is currently targeted for
inclusion in Service Levels (Fix Packs) 8.0.0.9 and
8.5.5.2 of WebSphere Application Server versions 8.0.0 and
8.5.5.

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
PM97510
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-09-20
Closed date
2014-01-03
Last modified date
2014-01-03

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

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

Document Information

Modified date:
28 April 2022

Tips

PM97510: Stackoverflow in OpenJPA due to endless recursive calls in 'isLoaded'

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

R800 PSY

R850 PSY

Document Information

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