we set up an email listener to receive small xml orders via mail. The listener works fine. The xml files are transferred to the flow service specified in the mail subject. So most of the time we don’t have any problems. But once in a month or so one of these orders (maybe sometimes some more) is processed twice. And it’s processed simultaneously. The flow service seems to be called two times at the same time. We log every step in the flow service and they occur twice in the logfiles. Sometimes even with the same log index. When this error happens it always happens for the first order of the day. But it doesn’t happen every day. So it’s quite strange.
What could be the reason for this? Do you have any ideas?