[Koha-bugs] [Bug 18725] New: Process_message_queue sends duplicate emails if message_queue is not writable.

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=18725

            Bug ID: 18725
           Summary: Process_message_queue sends duplicate emails if
                    message_queue is not writable.
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5 - low
         Component: Notices
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: barton at bywatersolutions.com
        QA Contact: testopia at bugs.koha-community.org

Last week, we had a database server whose disk filled, causing database writes
to fail.

This meant that messages in message_queue marked 'pending' were not marked as
'sent' when they were added to the postfix mail queue; messages were sent every
15 minutes (as specified in the cron job) until the disk space issues were
cleared.

I would suggest adding a token write to the start of process_message_queue.pl
as a 'canary in the coal mine'. If the database write fails,
process_message_queue should stop, because it's not safe to proceed sending
emails that may not be marked 'sent'.

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