I can't answer exactly why it happened. System behavior when the root file system is exhausted is very unpredictable and this behavior, while strange, doesn't really surprise me. I wouldn't expect anything to be done to allow proper functionality with an exhausted filesystem. I also don't think that this really points to a larger problem. It's also likely that there were a lot of other odd behaviors that you didn't realize!

I'd consider what is exhausting your filesystem. Probably logs. And move that to a mount point that isn't part of the operating system.

Good luck!

-Brett

On Thu, Feb 20, 2025 at 2:20 AM Leonid Fainshtein via sr-users <sr-users@lists.kamailio.org> wrote:

Hi,
I am using Kamailio v.5.8.4 on Ubuntu 24.04, kernel 6.8.0-51-generic
In the configuration script I explicitly set $fs="udp:adrr:port". In normal situations, it works properly and I see that the UDP SIP requests are sent from the requested IP and port.
Due to some reasons, free space on the server root filesystem was exhausted.
I cleaned up the file system and everything looked good except the fact that Kamailio started to send messages from ephemeral IP ports instead of the port defined in $fs.
Restart of Kamailio didn't solve the problem.
But the server reboot fixed the issue.
I don't understand how the lack of free disk space can cause such a problem and I'm afraid that there is another reason that I am missing.
Has anybody seen such a problem?

Best regards,
Leonid
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