[GH-ISSUE #70] CalDAV timeout #969

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opened 2026-03-13 23:38:30 +03:00 by kerem · 3 comments

kerem commented

2026-03-13 23:38:30 +03:00

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Originally created by @peterbeck on GitHub (Oct 17, 2015).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/70

I've got an error synchronizing a calendar to Outlook 2013 (testing the settings is ok, no error, using the most current release 1.4.0)

 INFO  2015-10-17 14:18:00,452 [ VSTA_Main] ronizer.Scheduling.SynchronizationWorker . MoveNext                       - Duration of 'Running synchronization profile 'Kalender'': 00:00:05.5448331
 INFO  2015-10-17 14:18:56,800 [ VSTA_Main]    CalDavSynchronizer.ComponentContainer . MoveNext                       - Synchronization manually triggered
 INFO  2015-10-17 14:18:56,800 [ VSTA_Main] ronizer.Scheduling.SynchronizationWorker . MoveNext                       - Starting 'Running synchronization profile 'Kalender''
 INFO  2015-10-17 14:18:56,800 [ VSTA_Main]   GenSync.Synchronization.Synchronizer`6 . MoveNext                       - Entered. Syncstrategy 'TwoWayInitialSyncStateCreationStrategy`6' with Atype='AppointmentItemWrapper' and Btype='IICalendar'
 INFO  2015-10-17 14:18:56,815 [ VSTA_Main] hronizer.Implementation.CalDavRepository . GetVersions                    - Starting 'CalDavRepository.GetVersions'
 INFO  2015-10-17 14:18:56,815 [ VSTA_Main] hronizer.Implementation.CalDavRepository . GetVersions                    - Duration of 'CalDavRepository.GetVersions': 00:00:00.0003482
 ERROR 2015-10-17 14:18:56,831 [ VSTA_Main]   GenSync.Synchronization.Synchronizer`6 . MoveNext                       - 
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Die zugrunde liegende Verbindung wurde geschlossen: Eine Verbindung, deren Aufrechterhaltung erwartet wurde, ist vom Server geschlossen worden..
   bei System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   bei System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)

CardDAV is synchronizing without issues, Backend is SOGo 2.3.2 running on Debian Jessie with Apache. Am I doing something wrong or do I need to set some KeepAlive option in Apache to avoid that issue ?
I've already removed the profile and added a new one, default settings, calendar is recognized correctly with Autodiscovery.
Adding new entries to the calender is synchronized to the server without any issues, also changes in these newly added events are synchronized correctly (adding categories, set to private etc), but somehow the existing entries do not show up in Outlook. I did also check the Outlook view (reset to defaults). All the existing (not synchronized) entries are (as far as I have seen) reoccurring events, if that matters. Standard events (non reoccurring) seem to be synchronized....

Originally created by @peterbeck on GitHub (Oct 17, 2015). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/70 I've got an error synchronizing a calendar to Outlook 2013 (testing the settings is ok, no error, using the most current release 1.4.0) ``` INFO 2015-10-17 14:18:00,452 [ VSTA_Main] ronizer.Scheduling.SynchronizationWorker . MoveNext - Duration of 'Running synchronization profile 'Kalender'': 00:00:05.5448331 INFO 2015-10-17 14:18:56,800 [ VSTA_Main] CalDavSynchronizer.ComponentContainer . MoveNext - Synchronization manually triggered INFO 2015-10-17 14:18:56,800 [ VSTA_Main] ronizer.Scheduling.SynchronizationWorker . MoveNext - Starting 'Running synchronization profile 'Kalender'' INFO 2015-10-17 14:18:56,800 [ VSTA_Main] GenSync.Synchronization.Synchronizer`6 . MoveNext - Entered. Syncstrategy 'TwoWayInitialSyncStateCreationStrategy`6' with Atype='AppointmentItemWrapper' and Btype='IICalendar' INFO 2015-10-17 14:18:56,815 [ VSTA_Main] hronizer.Implementation.CalDavRepository . GetVersions - Starting 'CalDavRepository.GetVersions' INFO 2015-10-17 14:18:56,815 [ VSTA_Main] hronizer.Implementation.CalDavRepository . GetVersions - Duration of 'CalDavRepository.GetVersions': 00:00:00.0003482 ERROR 2015-10-17 14:18:56,831 [ VSTA_Main] GenSync.Synchronization.Synchronizer`6 . MoveNext - System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Die zugrunde liegende Verbindung wurde geschlossen: Eine Verbindung, deren Aufrechterhaltung erwartet wurde, ist vom Server geschlossen worden.. bei System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) bei System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar) ``` CardDAV is synchronizing without issues, Backend is SOGo 2.3.2 running on Debian Jessie with Apache. Am I doing something wrong or do I need to set some KeepAlive option in Apache to avoid that issue ? I've already removed the profile and added a new one, default settings, calendar is recognized correctly with Autodiscovery. Adding new entries to the calender is synchronized to the server without any issues, also changes in these newly added events are synchronized correctly (adding categories, set to private etc), but somehow the existing entries do not show up in Outlook. I did also check the Outlook view (reset to defaults). All the existing (not synchronized) entries are (as far as I have seen) reoccurring events, if that matters. Standard events (non reoccurring) seem to be synchronized....

kerem closed this issue

2026-03-13 23:38:35 +03:00

kerem commented

2026-03-13 23:38:41 +03:00

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@aluxnimm commented on GitHub (Oct 17, 2015):

What are your apache settings regarding KeepAlive?

@aluxnimm commented on GitHub (Oct 17, 2015): What are your apache settings regarding KeepAlive?

kerem commented

2026-03-13 23:38:46 +03:00

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@peterbeck commented on GitHub (Oct 18, 2015):

Hi aluxnimm,
there are no KeepAlive settings set at the moment. Do you recommend anything ? (I've also asked the same question to the SOGo-lists, maybe it would be better to set that anyway).

But somehow there was also a mysql-table crashed and after repairing the table, I could not see this issue anymore. Maybe I was making noise but there was another problem....I'll check that during monday, otherwise I'll close that issue.
Thanks and regards
Peter

@peterbeck commented on GitHub (Oct 18, 2015): Hi aluxnimm, there are no KeepAlive settings set at the moment. Do you recommend anything ? (I've also asked the same question to the SOGo-lists, maybe it would be better to set that anyway). But somehow there was also a mysql-table crashed and after repairing the table, I could not see this issue anymore. Maybe I was making noise but there was another problem....I'll check that during monday, otherwise I'll close that issue. Thanks and regards Peter

kerem commented

2026-03-13 23:38:51 +03:00

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@nertsch commented on GitHub (Oct 19, 2015):

Hi,

CalDAV Synchronizer requires a Server, which supports KeepAlive. Otherwise synchronization will fail. Currently there is no Setting to turn KeepAlive off.

br
Gerhard

@nertsch commented on GitHub (Oct 19, 2015): Hi, CalDAV Synchronizer requires a Server, which supports KeepAlive. Otherwise synchronization will fail. Currently there is no Setting to turn KeepAlive off. br Gerhard