[horde] Horde Alarm Emails Repeating Themselves

[Robert McAuley]

Hello,

My email alarms are repeating themselves.  It seems Horde forgets or overwrites the "sent" flag that gets serialized into the alarms_internal column.  The problem is this only happens on occasion - sometimes I will only see 1 reminder, sometimes I see 5 reminders.  My cron is set to run every 5 minutes, sometimes I see behaviour such as:

15 minutes before - Alarm sent as specified
10 minutes before - Alarm sent again when it shouldn't
5 minutes before - Nothing
Time of event - Nothing.
5 minutes after - Alarm sent
10 minutes after - Nothing
15 minutes after - Alarm sent

... there is no rhyme or reason.  My Horde may send an alarm repeatedly for 30 minutes, then stop for 20, then send 1.  It's incomprehensible.

What could be happening that overwrites the sent flag?

It may have something to do with me currently working around this bug:

http://bugs.horde.org/ticket/8381

... where I am forcefully changing the time that the _list alarm function uses, shifting it 4 hours to bring it into EDT. (the timezone of 99% of my users)  Without this, I can't get any alarms.

- Rob