Curbing semaphore messages

 
From: "Chris Holt chris.holt@PROTECTED [Dada Mail Developers]" <dadadev@PROTECTED>
Subject: Curbing semaphore messages
Date: November 2nd 2019

Hello Developers, I have just joined the list. Over the past couple of weeks, I have installed Dada Mail on the shared host of the website of the astronomy society I am involved in, to provide a discussion list.This was not without challenges (ssh cli install only, no CPAN,additional Perl modules for SSL built locally and uploaded, etc) but it is almost ready now for society members' use.

Cron and crontab were also unavailable on the shared host, so I have madeĀ  and uploaded Schedule::Cron, a cron-like Perl scheduler from metacpan, which seems to be working well. I find, however, that there are periodic messages in the errors file of this type:

[Sat NovĀ  2 15:45:03 2019] mail.cgi: PID: 48437 Semaphore does not exist to delete at,'/home/very/long/path/user/private/.dada_files/.tmp/scheduledtasks.lock at DADA/App/ScheduledTasks.pm line 210.With the scheduler applying the curl command to run Dada every five minutes, 24 of these are written every hour, so the errors file will balloon over time. Assuming this is normal behaviour, do most list admins accept it and find it somehow useful, or should I delve into the code and mute or shorten these messages?

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