[Koha-bugs] [Bug 15529] Process Message Queue may send duplicate emails if process is launched twice

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15529

--- Comment #4 from Alex Buckley <alexbuckley at catalyst.net.nz> ---
Created attachment 78205
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=78205&action=edit
Bug 15529 - Using flock to lock new messagequeue.lock lockfile whilst
process_message_queue.pl is being executed

Test plan:
1. In two terminals open koha-shell and try to run
./process_message_queue.pl and notice you can run the script multiple
times simulataneously without a warning/error being displayed

2. Apply patch

3. Repeast step 1 and notice that the second of the two scripts to be
run will output text saying './process_message_queue.pl is already
running. Exiting'

In this case the aforementioned text is displayed and the body of the
cronjob is not run.

4. The first cronjob script to run, runs without issues

5. At the end of the execution of the first script a 15 second pause is run

Sponsored-By: Parliament Library

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