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Re: WebObjects application instances hanging - Deadlocks occurring
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Re: WebObjects application instances hanging - Deadlocks occurring

  • Subject: Re: WebObjects application instances hanging - Deadlocks occurring
  • From: Ralf Schuchardt <email@hidden>
  • Date: Fri, 21 Nov 2014 17:55:06 +0100
Hi Raghu,

as far as I can see, you have a log of lock/unlock operations with the EditingContext IDs and your original deadlock log with blocked thread names. But it is not easy to correlate those two logs, as the deadlock log is missing object IDs and the lock/unlock log has no thread names. I would expect there to be one more lock than unlock in the log, but it is tedious to find the right one.

There is the property "er.extensions.ERXEC.markOpenLocks" that may help, if you can get it to work. When the deadlock occurs the direct action "ERXDirectAction/showOpenEditingContextLockTraces" should show you a more complete picture of currently open locks and where the offending editing context was created.

Kind regards,
Ralf


Am 20.11.2014 um 15:23 schrieb Raghavender Bokka <email@hidden>:

> Hi Team,
>
> The following are the exceptions generating in the log files when we enable the ERX logging, and we do not have any code in the Session.sleep method. And some of our WebObjects application instances are hanging when some user load (around 1000 users) are testing, when we look into the java process thread dump there are deadlocks occurring.
>
> -----------------------------------------------------------------------
> -----------------------------------------------------------------------
> Exception
> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
> at com.webobjects.eocontrol.EOEditingContext._sendOrEnqueueNotification(EOEditingContext.java:4721)
> at com.webobjects.eocontrol.EOEditingContext._objectsChangedInStore(EOEditingContext.java:3562)
> at er.extensions.eof.ERXEC._objectsChangedInStore(ERXEC.java:1285)
>    ... skipped 7 stack elements
> at com.webobjects.eocontrol.EOObjectStoreCoordinator._objectsChangedInSubStore(EOObjectStoreCoordinator.java:693)
>    ... skipped 16 stack elements
> at com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingContext(EOObjectStoreCoordinator.java:386)
> at com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.java:3192)
> at er.extensions.eof.ERXEC._saveChanges(ERXEC.java:981)
> at er.extensions.eof.ERXEC.saveChanges(ERXEC.java:903)
> at TestTakingMode$StudentTestSessionMode.testSubmitted(TestTakingMode.java:648)
> at ReviewTestResponsePage.submitTest(ReviewTestResponsePage.java:99)
>    ... skipped 4 stack elements
> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>    ... skipped 46 stack elements
> at Application.dispatchRequest(Application.java:670)
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXSession  - Will terminate, sessionId is FkDsWpsOxKy1TDaligNLDg
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _incrementReferenceCounterForKey() - count = 26, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:849)
> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>    ... skipped 6 stack elements
> at Application.dispatchRequest(Application.java:670)
> ... skipped 3 stack elements
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
> at com.webobjects.eocontrol.EOEditingContext._dispose(EOEditingContext.java:1116)
> at com.webobjects.eocontrol.EOEditingContext.dispose(EOEditingContext.java:1111)
> at er.extensions.eof.ERXEC.dispose(ERXEC.java:610)
> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:854)
> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>    ... skipped 6 stack elements
> at Application.dispatchRequest(Application.java:670)
> ... skipped 3 stack elements
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@dd151f, er.extensions.eof.ERXEC@13cd5b5]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
> at com.webobjects.eocontrol.EOEditingContext._dispose(EOEditingContext.java:1218)
> at com.webobjects.eocontrol.EOEditingContext.dispose(EOEditingContext.java:1111)
> at er.extensions.eof.ERXEC.dispose(ERXEC.java:610)
> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:854)
> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>    ... skipped 6 stack elements
> at Application.dispatchRequest(Application.java:670)
> ... skipped 3 stack elements
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@dd151f, er.extensions.eof.ERXEC@dd151f]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 25, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 15, key = IE.9.0.5.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - Unlock remaining: [er.extensions.eof.ERXEC@dd151f]
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - Unlocking autolocked editing context: er.extensions.eof.ERXEC@dd151f
> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 24, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
>
> -----------------------------------------------------------------------
> -----------------------------------------------------------------------
>
> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
> at com.webobjects.appserver.WOSession._awakeInContext(WOSession.java:835)
> at com.webobjects.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1917)
> at er.extensions.appserver.ERXApplication.restoreSessionWithID(ERXApplication.java:2093)
>    ... skipped 6 stack elements
> at Application.dispatchRequest(Application.java:670)
> ... skipped 3 stack elements
> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@13cd5b5]
> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC$DefaultFactory  - Setting default delegate on editing context: er.extensions.eof.ERXEC@1a3b17a allows validation: true
> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - setting delegate to er.extensions.eof.ERXDefaultEditingContextDelegate@e93999
> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - s.java:375)
>       at er.extensions.eof.ERXEC.setDelegate(ERXEC.java:1312)
>       at er.extensions.eof.ERXEC$DefaultFactory.setDefaultDelegateOnEditingContext(ERXEC.java:1408)
>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1463)
>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>       at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>       at GenericComponent.localEditingContext(GenericComponent.java:75)
>       at SelectTestPage.fetchTests(SelectTestPage.java:71)
>       at SelectTestPage.selectNonDOETests(SelectTestPage.java:146)
>       at ToolsHelperFrame.selectTestPageFrame(ToolsHelperFrame.java:29)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>       at java.lang.reflect.Method.invoke(Method.java:597)
>       at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>       at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>       at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>       at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>       at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>       at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>       at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>       at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>       at com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:138)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>       at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>       at Session.invokeAction(Session.java:191)
>       at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>       at er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:50)
>       at er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1687)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>       at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>       at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>       at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1802)
>       at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1767)
>       at Application.dispatchRequest(Application.java:670)
>       at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>       at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>       at java.lang.Thread.run(Thread.java:619)
>
>
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC$DefaultFactory  - Setting default delegate on editing context: er.extensions.eof.ERXEC@13cd5b5 allows validation: true
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - setting delegate to er.extensions.eof.ERXDefaultEditingContextDelegate@e93999
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - s.java:375)
>       at er.extensions.eof.ERXEC.setDelegate(ERXEC.java:1312)
>       at er.extensions.eof.ERXEC$DefaultFactory.setDefaultDelegateOnEditingContext(ERXEC.java:1408)
>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1463)
>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>       at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>       at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
>       at Session.setLoginUser(Session.java:106)
>       at Main.login(Main.java:185)
>       at Main.login(Main.java:120)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>       at java.lang.reflect.Method.invoke(Method.java:597)
>       at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>       at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>       at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>       at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>       at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>       at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>       at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>       at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>       at com.webobjects.appserver._private.WOSubmitButton.invokeAction(WOSubmitButton.java:70)
>       at er.extensions.foundation.ERXPatcher$DynamicElementsPatches$SubmitButton.invokeAction(ERXPatcher.java:214)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at er.extensions.components._private.ERXWOForm.invokeAction(ERXWOForm.java:180)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver._private.WOComponentContent.invokeAction(WOComponentContent.java:38)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:149)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>       at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:92)
>       at com.webobjects.appserver._private.WOComponentReference.invokeAction(WOComponentReference.java:127)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>       at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:92)
>       at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>       at Session.invokeAction(Session.java:191)
>       at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>       at er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:50)
>       at er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1687)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>       at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>       at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>       at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>       at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1802)
>       at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1767)
>       at Application.dispatchRequest(Application.java:653)
>       at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>       at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>       at java.lang.Thread.run(Thread.java:619)
>
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1465)
> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
> at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
> at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
> at Session.setLoginUser(Session.java:106)
> at Main.login(Main.java:185)
> at Main.login(Main.java:120)
>    ... skipped 4 stack elements
> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>    ... skipped 46 stack elements
> at Application.dispatchRequest(Application.java:653)
> ... skipped 3 stack elements
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@5971c3, er.extensions.eof.ERXEC@13cd5b5]
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@5971c3]
> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
> Exception
> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1467)
> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
> at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
> at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
> at Session.setLoginUser(Session.java:106)
> at Main.login(Main.java:185)
> at Main.login(Main.java:120)
>    ... skipped 4 stack elements
> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>    ... skipped 46 stack elements
> at Application.dispatchRequest(Application.java:653)
> ... skipped 3 stack elements
> -----------------------------------------------------------------------
> -----------------------------------------------------------------------
>
> Any help would be appreciated.
>
> Regards,
> Raghu.
> On 18-Nov-2014, at 5:08 PM, email@hidden wrote:


>>
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL: <http://lists.apple.com/archives/webobjects-dev/attachments/20141117/cdcbcb11/attachment.html>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Tue, 18 Nov 2014 17:09:40 +0530
>> From: Raghavender Bokka <email@hidden>
>> To: Ralf Schuchardt <email@hidden>,	Development WebObjects
>> 	<email@hidden>
>> Cc: Sudhakar Madala <email@hidden>,	"Mr. Ernie
>> 	Satterwhite" <email@hidden>,	"Vicky C. Miller"
>> 	<email@hidden>
>> Subject: Re: WebObjects application instances hanging - Deadlocks
>> 	occurring
>> Message-ID:
>> 	<email@hidden>
>> Content-Type: text/plain; charset=us-ascii
>>
>> Hi Ralf,
>>
>> The following are the exceptions generating in the log files when we enable the ERX logging, and we do not have any code in the Session.sleep method:
>>
>> -----------------------------------------------------------------------
>> -----------------------------------------------------------------------
>> Exception
>> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
>> at com.webobjects.eocontrol.EOEditingContext._sendOrEnqueueNotification(EOEditingContext.java:4721)
>> at com.webobjects.eocontrol.EOEditingContext._objectsChangedInStore(EOEditingContext.java:3562)
>> at er.extensions.eof.ERXEC._objectsChangedInStore(ERXEC.java:1285)
>>    ... skipped 7 stack elements
>> at com.webobjects.eocontrol.EOObjectStoreCoordinator._objectsChangedInSubStore(EOObjectStoreCoordinator.java:693)
>>    ... skipped 16 stack elements
>> at com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingContext(EOObjectStoreCoordinator.java:386)
>> at com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.java:3192)
>> at er.extensions.eof.ERXEC._saveChanges(ERXEC.java:981)
>> at er.extensions.eof.ERXEC.saveChanges(ERXEC.java:903)
>> at TestTakingMode$StudentTestSessionMode.testSubmitted(TestTakingMode.java:648)
>> at ReviewTestResponsePage.submitTest(ReviewTestResponsePage.java:99)
>>    ... skipped 4 stack elements
>> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>    ... skipped 46 stack elements
>> at Application.dispatchRequest(Application.java:670)
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXSession  - Will terminate, sessionId is FkDsWpsOxKy1TDaligNLDg
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _incrementReferenceCounterForKey() - count = 26, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
>> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:849)
>> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
>> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>>    ... skipped 6 stack elements
>> at Application.dispatchRequest(Application.java:670)
>> ... skipped 3 stack elements
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
>> at com.webobjects.eocontrol.EOEditingContext._dispose(EOEditingContext.java:1116)
>> at com.webobjects.eocontrol.EOEditingContext.dispose(EOEditingContext.java:1111)
>> at er.extensions.eof.ERXEC.dispose(ERXEC.java:610)
>> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:854)
>> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
>> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>>    ... skipped 6 stack elements
>> at Application.dispatchRequest(Application.java:670)
>> ... skipped 3 stack elements
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@dd151f, er.extensions.eof.ERXEC@13cd5b5]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
>> at com.webobjects.eocontrol.EOEditingContext._dispose(EOEditingContext.java:1218)
>> at com.webobjects.eocontrol.EOEditingContext.dispose(EOEditingContext.java:1111)
>> at er.extensions.eof.ERXEC.dispose(ERXEC.java:610)
>> at com.webobjects.appserver.WOSession._sleepInContext(WOSession.java:854)
>> at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplication.java:1883)
>> at er.extensions.appserver.ERXApplication.saveSessionForContext(ERXApplication.java:2075)
>>    ... skipped 6 stack elements
>> at Application.dispatchRequest(Application.java:670)
>> ... skipped 3 stack elements
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@dd151f, er.extensions.eof.ERXEC@dd151f]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@dd151f]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 25, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 15, key = IE.9.0.5.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - Unlock remaining: [er.extensions.eof.ERXEC@dd151f]
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.eof.ERXEC  - Unlocking autolocked editing context: er.extensions.eof.ERXEC@dd151f
>> Nov 17 22:22:01 Solar[6009] DEBUG er.extensions.appserver.ERXBrowserFactory  - _decrementReferenceCounterForKey() - count = 24, key = IE.7.0.4.0.Windows.{cpu = "Unknown CPU"; geckoRevision = "No Gecko"; }
>>
>> -----------------------------------------------------------------------
>> -----------------------------------------------------------------------
>>
>> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
>> at com.webobjects.appserver.WOSession._awakeInContext(WOSession.java:835)
>> at com.webobjects.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1917)
>> at er.extensions.appserver.ERXApplication.restoreSessionWithID(ERXApplication.java:2093)
>>    ... skipped 6 stack elements
>> at Application.dispatchRequest(Application.java:670)
>> ... skipped 3 stack elements
>> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@13cd5b5]
>> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC$DefaultFactory  - Setting default delegate on editing context: er.extensions.eof.ERXEC@1a3b17a allows validation: true
>> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - setting delegate to er.extensions.eof.ERXDefaultEditingContextDelegate@e93999
>> Nov 17 22:20:58 Solar[6009] DEBUG er.extensions.eof.ERXEC  - s.java:375)
>>       at er.extensions.eof.ERXEC.setDelegate(ERXEC.java:1312)
>>       at er.extensions.eof.ERXEC$DefaultFactory.setDefaultDelegateOnEditingContext(ERXEC.java:1408)
>>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1463)
>>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>>       at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>>       at GenericComponent.localEditingContext(GenericComponent.java:75)
>>       at SelectTestPage.fetchTests(SelectTestPage.java:71)
>>       at SelectTestPage.selectNonDOETests(SelectTestPage.java:146)
>>       at ToolsHelperFrame.selectTestPageFrame(ToolsHelperFrame.java:29)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>       at java.lang.reflect.Method.invoke(Method.java:597)
>>       at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>       at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>>       at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>>       at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>>       at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>>       at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>>       at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>>       at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>>       at com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:138)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>>       at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>>       at Session.invokeAction(Session.java:191)
>>       at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>>       at er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:50)
>>       at er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1687)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>>       at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>>       at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1802)
>>       at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1767)
>>       at Application.dispatchRequest(Application.java:670)
>>       at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>>       at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>>       at java.lang.Thread.run(Thread.java:619)
>>
>>
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC$DefaultFactory  - Setting default delegate on editing context: er.extensions.eof.ERXEC@13cd5b5 allows validation: true
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - setting delegate to er.extensions.eof.ERXDefaultEditingContextDelegate@e93999
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - s.java:375)
>>       at er.extensions.eof.ERXEC.setDelegate(ERXEC.java:1312)
>>       at er.extensions.eof.ERXEC$DefaultFactory.setDefaultDelegateOnEditingContext(ERXEC.java:1408)
>>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1463)
>>       at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>>       at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>>       at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
>>       at Session.setLoginUser(Session.java:106)
>>       at Main.login(Main.java:185)
>>       at Main.login(Main.java:120)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>       at java.lang.reflect.Method.invoke(Method.java:597)
>>       at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>       at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>>       at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>>       at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>>       at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>>       at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>>       at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>>       at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>>       at com.webobjects.appserver._private.WOSubmitButton.invokeAction(WOSubmitButton.java:70)
>>       at er.extensions.foundation.ERXPatcher$DynamicElementsPatches$SubmitButton.invokeAction(ERXPatcher.java:214)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at er.extensions.components._private.ERXWOForm.invokeAction(ERXWOForm.java:180)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver._private.WOComponentContent.invokeAction(WOComponentContent.java:38)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:149)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>>       at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:92)
>>       at com.webobjects.appserver._private.WOComponentReference.invokeAction(WOComponentReference.java:127)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>       at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>       at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>>       at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:92)
>>       at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>>       at Session.invokeAction(Session.java:191)
>>       at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>>       at er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:50)
>>       at er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1687)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>>       at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>>       at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>>       at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1802)
>>       at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1767)
>>       at Application.dispatchRequest(Application.java:653)
>>       at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>>       at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>>       at java.lang.Thread.run(Thread.java:619)
>>
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - locked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.lock(ERXEC.java:483)
>> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1465)
>> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>> at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>> at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
>> at Session.setLoginUser(Session.java:106)
>> at Main.login(Main.java:185)
>> at Main.login(Main.java:120)
>>    ... skipped 4 stack elements
>> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>    ... skipped 46 stack elements
>> at Application.dispatchRequest(Application.java:653)
>> ... skipped 3 stack elements
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After pushing: [er.extensions.eof.ERXEC@5971c3, er.extensions.eof.ERXEC@13cd5b5]
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.eof.ERXEC  - After popping: [er.extensions.eof.ERXEC@5971c3]
>> Nov 17 22:20:48 Solar[6009] DEBUG er.extensions.ERXEC.LockLogger  - unlocked er.extensions.eof.ERXEC@13cd5b5
>> Exception
>> at er.extensions.eof.ERXEC.unlock(ERXEC.java:501)
>> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1467)
>> at er.extensions.eof.ERXEC$DefaultFactory._newEditingContext(ERXEC.java:1434)
>> at er.extensions.eof.ERXEC.newEditingContext(ERXEC.java:1540)
>> at er.extensions.appserver.ERXSession.defaultEditingContext(ERXSession.java:353)
>> at Session.setLoginUser(Session.java:106)
>> at Main.login(Main.java:185)
>> at Main.login(Main.java:120)
>>    ... skipped 4 stack elements
>> at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>    ... skipped 46 stack elements
>> at Application.dispatchRequest(Application.java:653)
>> ... skipped 3 stack elements
>> -----------------------------------------------------------------------
>> -----------------------------------------------------------------------
>>
>> Any help would be appreciated.
>>
>> Regards,
>> Raghu.
>>

>>> Date: Mon, 17 Nov 2014 15:03:44 +0100
>>> From: Ralf Schuchardt <email@hidden>
>>> To: Development WebObjects <email@hidden>
>>> Subject: Re: WebObjects application instances hanging - Deadlocks
>>> 	occurring
>>> Message-ID: <email@hidden>
>>> Content-Type: text/plain; charset=us-ascii
>>>
>>> Hi,
>>>
>>> Am 17.11.2014 um 13:33 schrieb Raghavender Bokka <email@hidden>:
>>>
>>>> Hi Team,
>>>>
>>>> Some of our WebObjects application instances are hanging when some user load (around 1000 users) are testing, when we look into the java process thread dump there are deadlocks occurring. The following is the thread dump:
>>>
>>> [...]
>>>
>>>> "WorkerThread24" prio=3 tid=0x00e42800 nid=0x31 waiting on condition [0xd49fe000]
>>>> java.lang.Thread.State: WAITING (parking)
>>>>     at sun.misc.Unsafe.park(Native Method)
>>>>     - parking to wait for  <0xdc3837c8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
>>>>     at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
>>>>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
>>>>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
>>>>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
>>>>     at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
>>>>     at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
>>>>     at com.webobjects.eocontrol.EOEditingContext.lock(EOEditingContext.java:4617)
>>>>     at er.extensions.eof.ERXEC.lock(ERXEC.java:480)
>>>>     at com.webobjects.appserver.WOSession._awakeInContext(WOSession.java:835)
>>>>     at com.webobjects.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1917)
>>>>     at er.extensions.appserver.ERXApplication.restoreSessionWithID(ERXApplication.java:2093)
>>>>     at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:324)
>>>>     at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>>>>     at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>>>>     - locked <0xdbc631d0> (a java.lang.Object)
>>>>     at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>>>>     at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1802)
>>>>     at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1767)
>>>>     at Application.dispatchRequest(Application.java:670)
>>>>     at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>>>>     at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>>>>     at java.lang.Thread.run(Thread.java:619)
>>>
>>> This stack trace seems to indicate, that the defaultEditingContext was not unlocked in the previous request. Do you see an exception prior to the deadlock?
>>> If you have code in a Session.sleep() method, make sure to catch all exceptions there.
>>>
>>> Ralf


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 >WebObjects application instances hanging - Deadlocks occurring (From: Raghavender Bokka <email@hidden>)

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