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Leigh B. Stoller authored
by the web server forks a child to do the actual work of calling tbend and other stuff. The parent returns right away and the script ends. When the experiment termination (child) ends, an email message is sent to the user that issued the termination request. To prevent multiple clicks, I added a DB field called expt_terminating that is a DATETIME field. If the field is set, the script fails and the user is told to be more patient. I used a DATETIME field mostly for debugging purposes so we can track and future problems.
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