If you run LiteSpeed Web Server, you may receive emails like below from time to time:

At [18/Sep/2025:11:14:29 +0100], web server with pid=1494795 received unexpected signal=9, no core file created. A new instance of web server will be started automatically!

Above, we see that no core file was created.

In our experience, this happens if GDB (the GNU Project debugger) is not installed on the server.

To install it, assuming you are running a RHEL based system such as AlmaLinux or Rocky Linux, simply run the below command:

yum install gdb

Then, wait until the next time LiteSpeed automatically restarts, and a core dump should be created, which can be passed to LiteSpeed's technical support team for investigation.

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