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Unable to decrement snapshot count ....count is already 0 or does not exist
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Unable to decrement snapshot count ....count is already 0 or does not exist

  • Subject: Unable to decrement snapshot count ....count is already 0 or does not exist
  • From: Owen McKerrow <email@hidden>
  • Date: Thu, 24 Apr 2008 09:16:43 +1000

Hi All,

One of our apps when down yesterday and on trawling through the log files I found 8 instances of the error : is unable to decrement snapshot count for object with global ID _EOIntegralKeyGlobalID [PublicationKeyword (java.lang.Long)151400] - count is already 0 or this snapshot doesn't exist ( see full stack trace below ). All appear to have come from the same saveChanges() call. Also note each time it occurred it was for a separate object.

Each of the objects had been created about 13 minutes before the errors e.g.

2008,04.23 15: :56,420 "INSERT INTO PUB_KEYWORD(pub_keyword, KEYWORD, pub) VALUES (?, ?, ?)" withBindings: 1:151400 (publicationKeyWordID), 2:"proteins"(keyword), 3:23092(publicationID)>

Anyone have any suggestions as to what may have caused this ? i.e. what sort of things I should be looking for in the code. The app has been running for almost 2 years now and this is the first time we've had this problem ( in fact its the first time I have seen it in 10 years of WO development ).

As always all comments/questions/feedback welcome.

Owen McKerrow
WebMaster, emlab
Ph : +61 02 4221 5517
http://emlab.uow.edu.au

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

People who prefer typing to pointing then seem to prefer acronyms to save typing :-)
-Denis Stanton, On people using Command Line Interfaces


decrementSnapshotCountForGlobalID: com.webobjects.eoaccess.EODatabase com.webobjects.eoaccess.EODatabase@1b94ea2 -- is unable to decrement snapshot count for object with global ID _EOIntegralKeyGlobalID [PublicationKeyword (java.lang.Long)151400] - count is already 0 or this snapshot doesn't exist

2008,04.23 15:43:37,825 DEBUG [http-8968-Processor2] (Log.NSLogDebug: 1546 appendln) - java.lang.RuntimeException: Unable to decrement snapshot count for object with global ID _EOIntegralKeyGlobalID [PublicationKeyword (java.lang.Long)151400] - count is already 0 or this snapshot doesn't exist at com.webobjects.eoaccess.EODatabase.decrementSnapshotCountForGlobalID (EODatabase.java:1150) at com.webobjects.eoaccess.EODatabaseContext.editingContextDidForgetObjectW ithGlobalID(EODatabaseContext.java:3752) at com.webobjects.eocontrol.EOObjectStoreCoordinator.editingContextDidForge tObjectWithGlobalID(EOObjectStoreCoordinator.java:665) at com.webobjects.eocontrol.EOEditingContext.editingContextDidForgetObjectW ithGlobalID(EOEditingContext.java:3921) at com.webobjects.eocontrol.EOEditingContext._processReferenceQueue (EOEditingContext.java:4833) at com.webobjects.eocontrol.EOEditingContext.unlockObjectStore (EOEditingContext.java:4751) at com.webobjects.eocontrol.EOEditingContext.editingContextDidForgetObjectW ithGlobalID(EOEditingContext.java:3923) at com.webobjects.eocontrol.EOEditingContext.editingContextDidForgetObjectW ithGlobalID(EOEditingContext.java:3921) at com.webobjects.eocontrol.EOEditingContext._processReferenceQueue (EOEditingContext.java:4833) at com.webobjects.eocontrol.EOEditingContext._sendOrEnqueueNotification (EOEditingContext.java:4786) at com.webobjects.eocontrol.EOEditingContext._globalIDChanged (EOEditingContext.java:2024) at sun.reflect.GeneratedMethodAccessor215.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.webobjects.foundation.NSSelector._safeInvokeMethod (NSSelector.java:120) at com.webobjects.foundation.NSNotificationCenter$_Entry.invokeMethod (NSNotificationCenter.java:601) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:545) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:575) at com.webobjects.eocontrol.EOEditingContext._processGlobalIDChanges (EOEditingContext.java:2020) at sun.reflect.GeneratedMethodAccessor216.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.webobjects.foundation.NSSelector.invoke(NSSelector.java:354) at com.webobjects.foundation.NSSelector._safeInvokeSelector (NSSelector.java:108) at com.webobjects.eocontrol.EOEditingContext._sendOrEnqueueNotification (EOEditingContext.java:4784) at com.webobjects.eocontrol.EOEditingContext._globalIDChanged (EOEditingContext.java:2024) at sun.reflect.GeneratedMethodAccessor215.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.webobjects.foundation.NSSelector._safeInvokeMethod (NSSelector.java:120) at com.webobjects.foundation.NSNotificationCenter$_Entry.invokeMethod (NSNotificationCenter.java:601) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:545) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:575) at com.webobjects.eocontrol.EOObjectStoreCoordinator._globalIDsChangedInSub Store(EOObjectStoreCoordinator.java:749) at sun.reflect.GeneratedMethodAccessor336.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.webobjects.foundation.NSSelector._safeInvokeMethod (NSSelector.java:120) at com.webobjects.foundation.NSNotificationCenter$_Entry.invokeMethod (NSNotificationCenter.java:601) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:545) at com.webobjects.foundation.NSNotificationCenter.postNotification (NSNotificationCenter.java:575) at com.webobjects.eoaccess.EODatabaseContext.commitChanges (EODatabaseContext.java:6544) at com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingCo ntext(EOObjectStoreCoordinator.java:425) at com.webobjects.eocontrol.EOEditingContext.saveChanges (EOEditingContext.java:3226) at edu.uow.ris.framework.SelfCleaningEditingContext.saveChanges (SelfCleaningEditingContext.java:44) at edu.uow.ris.framework.CooperatingEditingContext.saveChanges (CooperatingEditingContext.java:223) at edu.uow.ris.framework.CooperatingEditingContext.saveChanges (CooperatingEditingContext.java:247) at RISPageComponent.save (RISPageComponent.java:115) at PublicationDetails.savePublication (PublicationDetails.java:1541) at PublicationDetails.saveChanges (PublicationDetails.java:169) at sun.reflect.GeneratedMethodAccessor1139.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25)






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