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I have a production server with Ubuntu 14.04 OS. I am observing some suspicious behavior from sshd, HTTPd and crond.

Suddenly these processes have started to use 100% of CPU. If I kill these processes CPU utilization becomes normal.

nice top -c

top command output here

lsof -n -p 8310

lsof command output here

cat /proc/8310/maps

Please find the cat command output link in the command section

I am running a java process in this server and in normal condition there will be almost 98% idle CPU. CPU usage will be high until I kill these process.

How can I solve it?

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  • s3.amazonaws.com/superuser12/catcmd1.png and s3.amazonaws.com/superuser12/catcmd2.png
    – hari
    Jun 14, 2017 at 7:30
  • 3
    Please don't post screenshots of text. Copy the text here and apply code formatting/
    – muru
    Jun 14, 2017 at 7:34
  • None of what you have posted shows any problems as far as I can see.
    – Soren A
    Jun 14, 2017 at 7:49
  • @SorenA is there any way that I can find which process/cmd triggered this httpd process. I am using apache-tomcat to serve the website. What will be the reason suddenly httpd, sshd process using 50-80 % CPU
    – hari
    Jun 14, 2017 at 8:12
  • @hari you can continue using top to show which processes that are using cpu and other resources. And if httpd is the one using all cpu, you will have to analyze what requests are triggering this.
    – Soren A
    Jun 14, 2017 at 8:46

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