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My system gets me an error that saying 'Too many open files'. I investigated this error and turned out that /usr/bin/uwsgi created sockets(?) more than 1020. If it creates more than 1020, I guess, the above error comes up with.

So What I try to do is to run a shell script that monitors the number of open files and if it exceeds more than 1000, to kill its PID to resolve this error at this stage.

#uwsgimonitor.sh #!/bin/bash #filename=/usr/bin/uwsgi filename=/usr/bin/uwsgi Cnt= lsof | awk '/uwsgi/ {print $1,$2}' | uniq -c | sort -r | head -1 | awk '{print $1}' PROCESS_ID = lsof | awk '/uwsgi/ {print $1,$2}' | uniq -c | sort -r | head -1 | awk '{print $2}' if [ $Cnt gt 1000 ] then echo "Found the number of socket open exceeds $Cnt." kill -9 $PROCESS_ID else echo "" #nothing to do. fi

In crontab, I added this line but it seems not to kill the PID that I meant.

* * * * * sh /home/root/scripts/uwsgimonitor.sh

What am I missing?

Thank you in advance.

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  • This won't really solve your problem - you need to look at how to configure UWSGI/your webserver to limit the number of sockets opened, or allow the user it runs as to open more files via ulimits.conf. Commented Feb 14, 2022 at 11:50
  • I should've mentioned the background. I am an automation tester and this issue on the track fixed. Meanwhile, I just use this shell script to prevent any error message from popping up. It is just a temporary solution to test my app. Commented Feb 15, 2022 at 22:30

1 Answer 1

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For those who want to how my situation went.

#!/bin/bash count=$(lsof | awk '/uwsgi/ {print $1,$2}' | uniq -c | sort -r | head -1 | awk '{print $1}') PROCESS_ID=$(lsof | awk '/uwsgi/ {print $1,$2}' | uniq -c | sort -r | head -1 | awk '{print $2}') expectLimit=1000 echo "open socket:$count" echo "pid:$PROCESS_ID" if [[ ${count} -gt ${expectLimit} ]] then echo "Found uwsgi exceeds limit :${expectLimit}" kill -9 $PROCESS_ID else echo "" #nothing to do. fi

This one works for me. Thanks.

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