[CalendarServer-users] HTTP 404 problems

Rasmus Borup Hansen rbh at intomics.com
Thu Apr 26 07:07:37 PDT 2012

On Apr 26, 2012, at 15:05 , Chris Cleeland wrote:

> With regard to disabling memcached, one of the few responses I got back to my queries regarding memcached is that it's not possible to disable:
> http://lists.macosforge.org/pipermail/calendarserver-users/2012-February/001949.html
> In my case, I'm not sure the GUID generation would change the situation substantially because I already have calendars with GUIDs assigned.  What will happen in my case is that sometimes a request will come in and will be "found", while 5 minutes later a request for the same item will come in and not be found.  With my weak python debugging skills I traced it down to trying find that something in cache and it not being there.  I would think that when it's not in cache it would get loaded, but it's almost as if memcached thinks it has the item but doesn't return it.

I didn't test the setup without memcached thoroughly - I just noted that it didn't work either.

I'm just guessing, but could it be a problem with some mapping between a real username and a GUID that at some point expires from a cache? Perhaps the code does not regenerate the mapping? If the usernames and GUIDs are in a directory, they can just be looked up.

Best regards,


Hansen, Rasmus Borup              Intomics - from data to biology
System Administrator              Diplomvej 377
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E: rbh at intomics.com               W: http://www.intomics.com/
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