InternalException thrown in BrokerImpl.endOperation
---------------------------------------------------
Key: OPENJPA-366
URL: https://issues.apache.org/jira/browse/OPENJPA-366
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 1.0.0
Environment: All platforms
Reporter: Albert Lee
Under heavy load during stress test, the following exception is observed:
<openjpa-1.0.0-SNAPSHOT-r420667:570288M fatal general error>
org.apache.openjpa.persistence.PersistenceException: null
at
org.apache.openjpa.kernel.BrokerImpl.endOperation(BrokerImpl.java:1728)
at org.apache.openjpa.kernel.BrokerImpl.isActive(BrokerImpl.java:1676)
at
org.apache.openjpa.kernel.DelegatingBroker.isActive(DelegatingBroker.java:420)
at
org.apache.openjpa.persistence.EntityManagerImpl.isActive(EntityManagerImpl.java:502)
at
org.apache.openjpa.persistence.PersistenceExceptions$2.translate(PersistenceExceptions.java:66)
at
org.apache.openjpa.kernel.DelegatingBroker.translate(DelegatingBroker.java:110)
at
org.apache.openjpa.kernel.DelegatingBroker.newObjectId(DelegatingBroker.java:262)
at
org.apache.openjpa.persistence.EntityManagerImpl.find(EntityManagerImpl.java:347)
at
com.ibm.svt.shoppingcartModule.stationstore.StationStoreSessionBean.getListOrders(StationStoreSessionBean.java:603)
at
com.ibm.svt.shoppingcartModule.stationstore.EJSRemoteStatelessStationStoreSession_5a5c538c.getListOrders(Unknown
Source)
at
com.ibm.svt.shoppingcartModule.stationstore._EJSRemoteStatelessStationStoreSession_5a5c538c_Tie.getListOrders(_EJSRemoteStatelessStationStoreSession_5a5c538c_Tie.java:244)
at
com.ibm.svt.shoppingcartModule.stationstore._EJSRemoteStatelessStationStoreSession_5a5c538c_Tie._invoke(_EJSRemoteStatelessStationStoreSession_5a5c538c_Tie.java:100)
at
com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:613)
at com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:466)
at com.ibm.rmi.iiop.ORB.process(ORB.java:503)
at com.ibm.CORBA.iiop.ORB.process(ORB.java:1553)
at com.ibm.rmi.iiop.Connection.respondTo(Connection.java:2680)
at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2554)
at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:62)
at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)
[8/31/07 22:45:26:265 EDT] 000000c1 SystemOut O MDD Translating
exception: <openjpa-0.0.0-r420667:570288 fatal internal error>
org.apache.openjpa.util.InternalException: null
[8/31/07 22:45:26:265 EDT] 000000c1 SystemErr R
<openjpa-0.0.0-r420667:570288 fatal internal error>
org.apache.openjpa.util.InternalException: null
[8/31/07 22:45:26:265 EDT] 000000c1 SystemErr R at
org.apache.openjpa.kernel.BrokerImpl.endOperation(BrokerImpl.java:1728)
After some investigation, it was determined that the internal exception is
caused by
if (_operationCount < 1)
throw new InternalException();
in BrokerImpl.endOperation();
We believe the cause of the problem is a lock() method call is missing in the
endOperation()
public boolean endOperation() {
lock(); <<<<< This is the missing lock() call since BrokerImpl.java
was created
try {
if (_operationCount == 1 && (_autoDetach & DETACH_NONTXREAD) != 0
&& (_flags & FLAG_ACTIVE) == 0) {
detachAllInternal(null);
}
if (_operationCount < 1)
throw new InternalException();
return _operationCount == 1;
} catch (OpenJPAException ke) {
throw ke;
} catch (RuntimeException re) {
throw new GeneralException(re);
} finally {
_operationCount--;
if (_operationCount == 0)
_operating.clear();
unlock();
}
}
Once we have done more tests and verify the fix, I'll submit a patch for this
problem.
If anyone doesn't think this is the solution. please response.
Albert Lee.
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