Hi, This error is reproducable on my development server: - - - 2016-07-23T10:07:08+0000 [caldav-0] [calendarserver.tools.purge#warn] Cleaning up future events for principal 54371764-438E-4D2A-8E25-A1A15E8CB14B since they are no longer in directory 2016-07-23T10:07:40+0000 [caldav-0] [twext.enterprise.jobs.jobitem#error] JobItem: 4699, WorkItem: 74300 failed: [Failure instance: Traceback: <class 'pg8000.core.ProgrammingError'>: (u'ERROR', u'57014', u'canceling statement due to statement timeout', u'while locking tuple (456,4) in relation "calendar_object"\nSQL statement "SELECT 1 FROM ONLY "caldavd"."calendar_object" x WHERE "resource_id" OPERATOR(pg_catalog.=) $1 FOR KEY SHARE OF x“', u'postgres.c', u'2967', u'ProcessInterrupts', u'', u'') - - - Shall I try upgrading to 8.1 or could it help to collect more info on 8.0? Thanks, Axel --- PGP-Key:29E99DD6 ☀ computing @ chaos claudius