Outlook resends calender entries while first sync is in process
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Hi,
we use z-push with a self developed backend to sync appointments,
contacts and tasks with our enterprise software.Recently we had some cases where customers reported a duplication
of calender entries when using outlook as client.At least in one case the customer was copying many calender entries from another
Outlook calender to the z-push synced calender to “import” the entries
to our system.While analysing the logs we found that obviously Outlook starts
to sync (sends calender entries to z-push) and while this block
of entries (about 120 entries in this case) is processed by z-push and our backend
Outlook starts to resend the same entries again. In this case even a third sync
was sent by Outlook while the second was processed.Our suspicion is Outlook starts the sync, waits for a certain
amount of time and if it gets no response in time (this seems to be about 1 minute)
it simply repeats the sync. So it seems our processing needs to much time
for the impatient Outlook, at least with many entries to sync.Has anybody else experienced this? And is there a simple solution
(a z-push configuration / Outlook setting etc.) for this?Is SYNC_MAX_ITEMS only working in one direction (client requests
changes from the server)? If we could reduce the amount of entries
send in one block by Outlook the time to process this “block”
could be reduced so the “timeout” would not get triggered (no perfect
solution but it would at least help to avoid this).Otherwise the only solution which comes to mind is that we
have to check the uuid send from outlook and
reject (rather ignore) all new entries whith already known uuids.Any suggestions welcome.
Regards,
Stephan
