Am 22.11.2016 um 01:10 schrieb Andre LaBranche <dre@apple.com>:

Hi,

On Nov 19, 2016, at 1:55 PM, Axel Rau <Axel.Rau@Chaos1.DE> wrote:

...
   maxConnections=config.MaxDBConnectionsPerPool
TypeError: __init__() got an unexpected keyword argument ‚dialect'

Can I remove that argument safely?

"dialect" is (was) used to select either Postgres or Oracle. I'd say the problem is either: 1) your config needs to be updated, or 2) you have mismatched versions of subcomponents with respect to CalendarServer (like maybe twisted extensions). 

In particular, this change set seems relevant: https://github.com/apple/ccs-twistedextensions/commit/0d442984f49a7966e7fdda862ba6850a91e6e79b

Here's a plist representation of the possible server settings: https://github.com/apple/ccs-calendarserver/blob/master/conf/caldavd-stdconfig.plist

I think the comment for DBType should reference DatabaseConnection, not DSN...