722997 - "An error occurred when writing to the calendar XXX" (code: MODIFICATION_FAILED, tatus Code: 412, Precondition failed)

Status: RESOLVED INCOMPLETE

(Calendar :: Provider: CalDAV, defect)

Description

[tatien]

Attachment: Screenshot

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:9.0.1) Gecko/20100101 Firefox/9.0.1
Build ID: 20111220165912

Steps to reproduce:

I have a few CalDAV calendars registered with Lightning. They are hosted on the Chandler server and are all read+write.

I worked offline and added a few events.

I run Thunderbird 10.0 on Mac OS X 10.5.


Actual results:

Once I came back online I got the following error:

----
An error occurred when writing to the calendar <calendar name>!
Error code: MODIFICATION_FAILED
Description: 
Status Code: 412, Precondition failed.

<?xml version='1.0' encoding='UTF-8'?><D:error xmlns:D="DAV:" xmlns:cosmo="http://osafoundation.org/cosmo/DAV"><cosmo:precondition-failed>If-None-Match disallows conditional request</cosmo:precondition-failed></D:error>
----

This happens when the calendars try to sync automatically or when I right-click and choose "Reload Remote Calendars".


Expected results:

They should have synched without error.

Comment 1

[Felix Möller]

Could you please attach logs with calendar.debug = true

Does this just happen with caching enabled?

Comment 2

[tatien]

Nothing is working anymore so I can't test. Is there a way to completely reset calendars and start from scratch? Cause now even when I remove and add my calendars nothing appears in the view (so I can't really test anything).

Comment 3

[Philipp Preißer-Kewisch [:Fallen][☁️📆]]

Warning: this will remove all calendar-related data, even events you might have created in the past:

Go to your profile: http://kb.mozillazine.org/Profile_folder_-_Thunderbird

* Delete the following directory: calendar-data
* Edit prefs.js and remove all lines that say pref("calendar....

Alternative: Start a whole new profile (this means you will have to set up Thunderbird again though).