Something you could try is using the JPA java agent.
I had an StackOverflowError with OpenJPA without the agent enabled.
Try adding: -javaagent:path-to-openjpa.jar
--
Luis Fernando Planella Gonzalez

Em Segunda-feira 17 Agosto 2009, às 09:15:16, javadia...@gmail.com escreveu:
> 
> Hi 
> I get the following Exception when I enable cache on my system and after
> tryng to get query data. 
> please help me 
> thanks 
> regards 
> Ahad Javadi 
> 
>  javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean:
> java.lang.StackOverflowError 
>         at
> com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:3731)
>  
>         at
> com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:3576) 
>         at
> com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1354) 
>         ... 106 more 
> Caused by: java.lang.StackOverflowError 
>         at org.apache.openjpa.util.OpenJPAId.hashCode(OpenJPAId.java:122) 
>         at java.util.HashMap.getEntry(HashMap.java:344) 
>         at java.util.HashMap.containsKey(HashMap.java:335) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:955) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at org.apa|#] 
> 
> [#|2009-08-16T07:24:10.902-0700|WARNING|sun-appserver9.1|javax.enterprise.system.stream.err|_ThreadID=28;_ThreadName=httpSSLWorkerThread-52188-2;_RequestID=e5fd71f7-336e-4e59-aed2-f65ae6d3d848;|che.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at
> org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78) 
>         at
> org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:2920)
>  
>         at
> org.apache.openjpa.kernel.StateManagerImpl.load(StateManagerImpl.java:378) 
>         at
> org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:1007) 
>         at org.apache.openjpa.kernel.BrokerImpl.findAll(BrokerImpl.java:913) 
>         at
> org.apache.openjpa.kernel.AbstractPCData.toRelationFields(AbstractPCData.java:221)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toNestedFields(AbstractPCData.java:188)
>  
>         at
> org.apache.openjpa.kernel.AbstractPCData.toField(AbstractPCData.java:78) 
>         at
> org.apache.openjpa.kernel.PCDataImpl.loadField(PCDataImpl.java:197) 
>         at org.apache.openjpa.kernel.PCDataImpl.load(PCDataImpl.java:167) 
>         at
> org.apache.openjpa.datacache.DataCacheStoreManager.load(DataCacheStoreManager.java:387)
>  
>         at
> org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
>  
>         at org.|#] 
> 
> 

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