[Zope] ZODB.POSException.ReadConflictError
Chris McDonough
chrism at plope.com
Tue May 3 11:14:55 EDT 2005
This is actually normal. See the end of
http://www.plope.com/Books/2_7Edition/Sessions.stx ("Conflict Errors")
for a short explanation.
On Tue, 2005-05-03 at 08:00 -0700, egroup at mac.com wrote:
> I'm getting a ZODB.POSException.ReadConflictError on my Plone 2.0.5
> site (Zope 2.7.3, Python 2.3.4 on Mac OS X Server 10.3.9). It happens
> most frequently when members try to register on my site (about 10% of
> the time), but occasionally happens when other pages are accessed (no
> pattern). Alternatively, a blank page is returned. No messages appear
> in the Zope or Plone error log.
>
> I've reproduced the error messages below, all of which resulted from a
> member registration. I received 7 error reports were from the past two
> days, with two types of errors. Of the two types of errors, the "oid
> 0x07e8, class BTrees.IOBTree.IOBucket" error was seen 5 times and the
> "oid 0x08, class Products.Transience.Transience.Length2" error was seen
> twice.
>
> Is there something wrong with my installation or is there something
> wrong with my data.fs file? How do I correct either?
>
> Marshall
>
> --
>
> TYPE 1 ERROR
>
> Site Error
>
> An error was encountered while publishing this resource.
>
> ZODB.POSException.ReadConflictError
> Sorry, a site error occurred.
>
> Traceback (innermost last):
>
> * Module ZPublisher.Publish, line 175, in publish_module_standard
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 139, in publish
> * Module Zope.App.startup, line 163, in zpublisher_exception_hook
> * Module ZPublisher.Publish, line 101, in publish
> * Module ZPublisher.mapply, line 88, in mapply
> * Module ZPublisher.Publish, line 39, in call_object
> * Module Products.CMFFormController.ControllerPageTemplate, line
> 80, in __call__
> * Module Products.CMFFormController.BaseControllerPageTemplate,
> line 39, in _call
> * Module Products.CMFFormController.ControllerBase, line 243, in
> getNext
> * Module Products.CMFFormController.Actions.TraverseTo, line 36, in
> __call__
> * Module ZPublisher.mapply, line 88, in mapply
> * Module ZPublisher.Publish, line 39, in call_object
> * Module Products.CMFFormController.FSControllerPythonScript, line
> 102, in __call__
> * Module Products.CMFFormController.FormController, line 354, in
> validate
> * Module ZPublisher.BaseRequest, line 156, in items
> * Module ZPublisher.HTTPRequest, line 1178, in get
> * Module Products.Sessions.SessionDataManager, line 94, in
> getSessionData
> * Module Products.Sessions.SessionDataManager, line 181, in
> _getSessionDataObject
> * Module Products.Transience.Transience, line 840, in
> new_or_existing
> * Module Products.Transience.Transience, line 487, in get
> * Module Products.Transience.Transience, line 293, in _move_item
> * Module ZODB.Connection, line 599, in setstate
> * Module ZODB.Connection, line 628, in _is_invalidated
>
> ReadConflictError: database read conflict error (oid 0x0f81, class
> BTrees.IOBTree.IOBucket)
>
> --
>
> TYPE 2 ERROR
>
> Site Error
>
> An error was encountered while publishing this resource.
>
> ZODB.POSException.ReadConflictError
> Sorry, a site error occurred.
>
> Traceback (innermost last):
>
> * Module ZPublisher.Publish, line 175, in publish_module_standard
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 149, in publish
> * Module Products.PlacelessTranslationService.PatchStringIO, line
> 51, in new_publish
> * Module ZPublisher.Publish, line 139, in publish
> * Module Zope.App.startup, line 163, in zpublisher_exception_hook
> * Module ZPublisher.Publish, line 101, in publish
> * Module ZPublisher.mapply, line 88, in mapply
> * Module ZPublisher.Publish, line 39, in call_object
> * Module Products.CMFFormController.ControllerPageTemplate, line
> 80, in __call__
> * Module Products.CMFFormController.BaseControllerPageTemplate,
> line 39, in _call
> * Module Products.CMFFormController.ControllerBase, line 243, in
> getNext
> * Module Products.CMFFormController.Actions.TraverseTo, line 36, in
> __call__
> * Module ZPublisher.mapply, line 88, in mapply
> * Module ZPublisher.Publish, line 39, in call_object
> * Module Products.CMFFormController.FSControllerPythonScript, line
> 102, in __call__
> * Module Products.CMFFormController.FormController, line 354, in
> validate
> * Module ZPublisher.BaseRequest, line 156, in items
> * Module ZPublisher.HTTPRequest, line 1178, in get
> * Module Products.Sessions.SessionDataManager, line 94, in
> getSessionData
> * Module Products.Sessions.SessionDataManager, line 181, in
> _getSessionDataObject
> * Module Products.Transience.Transience, line 840, in
> new_or_existing
> * Module Products.Transience.Transience, line 487, in get
> * Module Products.Transience.Transience, line 276, in _move_item
> * Module Products.Transience.Transience, line 939, in _housekeep
> * Module Products.Transience.Transience, line 566, in _finalize
> * Module Products.Transience.Transience, line 600, in
> _do_finalize_work
> * Module ZODB.Connection, line 599, in setstate
> * Module ZODB.Connection, line 628, in _is_invalidated
>
> ReadConflictError: database read conflict error (oid 0x08, class
> Products.Transience.Transience.Length2)
>
> --
>
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