Messages in this thread | | | From | Ajay Garg <> | Date | Wed, 14 Sep 2016 15:45:10 +0530 | Subject | Multiple invocations of cron-job AT THE SAME MINUTE on Raspbian |
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Hi All.
I have a raspbian-pi-3, and following is the first-level information ::
######################################## uname -a Linux raspberrypi 4.4.11-v7+ #888 SMP Mon May 23 20:10:33 BST 2016 armv7l GNU/Linux ########################################
Following is the script that is run by the every-minute cron ::
######################################## PID=`ps -aux | grep instamsg | grep -v grep | grep -v tail`
if [ -z "${PID}" ] then echo "Binary not running" cd /home/sensegrow chmod 777 instamsg
sleep 3 ./instamsg & else echo "Binary running fine" fi ########################################
Now, things are mostly fine, but very spuriously, I see that multiple instances of "instamsg" are spawned, sometimes upto 5, ALL IN THE SAME MINUTE. The occurrence of such phenomena is like once in a day.
I know there are multiple posts about this on the internet, but all of those point to faulty-script(s) that are run as part of cron. However, I guess the script I am using is pretty simple, and can never be "long-running, longer than a minute".
The same script runs without any issues for days on Maestro-Wireless routers, and Lanner-systems running Ubuntu. The issue seems to be only on Raspberry-Pi.
Who/what might be the culprit here?
Thanks and Regards, Ajay
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