Invalid argument error when calling in Perl, happens 10% of time

[kqe]

Hi, I call Podman, rootless, as a system() call in Perl script, which runs by a non-root user inside the email server to process mails.

In Perl I set up the following env variables:

XDG_RUNTIME_DIR
HOME

I also had to create a dozen SELinux modules, so that it works on all the few servers.

But when trying on another server, it works well for 90% of the mails it processed. For the other 10%, it issued exit code 1 with following error (issued through Perl):

cannot setns: Invalid argument

I couldn't google any similar error. What I can do?

It's the stock version Podman on Redhat 7, still supported by RedHat extended, not sure if too old.

[Luap99]

It's the stock version Podman on Redhat 7, still supported by RedHat extended, not sure if too old.

We only support the latest release upstream

[rhatdan]

Please upgrade to a RHEL8 or RHEL9 if possible.