Read-only file system error accessing Mailman admin

[Jim Ratliff]

When I try to access the pending-admin page for my Mailman list (from outside of cPanel), viz.,

http://mydomain.tld/mailman/admindb/discuss_mydomain.tld

I get (after authenticating with the moderator password) the following (noninformative) error:

Bug in Mailman version 2.1.23, We're sorry, we hit a bug! Please inform the webmaster for this site of this problem. Printing of traceback and other system information has been explicitly inhibited, but the webmaster can find this information in the Mailman error logs.

When I look in the Mailman error log, the most-relevant entry seems to be:

OSError: [Errno 30] Read-only file system: '/usr/local/cpanel/3rdparty/mailman/archives/public/discuss_mydomain.tld’

The traceback is:

Traceback (most recent call last):
admin(4753):   File "/usr/local/cpanel/3rdparty/mailman/scripts/driver", line 117, in run_main
admin(4753):     main()
admin(4753):   File "/usr/local/cpanel/3rdparty/mailman/Mailman/Cgi/admindb.py", line 337, in main
admin(4753):     mlist.Save()
admin(4753):   File "/usr/local/cpanel/3rdparty/mailman/Mailman/MailList.py", line 607, in Save
admin(4753):     self.CheckHTMLArchiveDir()
admin(4753):   File "/usr/local/cpanel/3rdparty/mailman/Mailman/Archiver/Archiver.py", line 236, in CheckHTMLArchiveDir
admin(4753):     breaklink(pubdir)
admin(4753):   File "/usr/local/cpanel/3rdparty/mailman/Mailman/Archiver/Archiver.py", line 56, in breaklink
admin(4753):     os.unlink(link)
admin(4753): OSError: [Errno 30] Read-only file system: '/usr/local/cpanel/3rdparty/mailman/archives/public/discuss_mydomain.tld'

Notably, I do not get an error when I access the same page via cPanel, i.e., with a URL like:

https://myprovider.tld:2083/cpsess0123456789/3rdparty/mailman/admin/discuss_mydomain.tld/

First, I note that the particular fact pattern (viz., error from outside of cPanel, but no error from inside cPanel) is identical to that reported in:
Copy mailman settings and subscribers.
However, the identification of "[Errno 30] Read-only file system" and associated traceback is different than identified there.

To be clear: This Mailman installation is not on a remote server. It's just the same one installed with cPanel. (FWIW, I did migrate this list from another server.)

Here's what I've already done:

/scripts/fixmailman
/scripts/restartsrv_mailman --stop
/scripts/restartsrv_mailman --start

and

/usr/local/cpanel/3rdparty/mailman/bin/check_perms

with the output:

Warning: Private archive directory is other-executable (o+x).
This could allow other users on your system to read private archives.
If you're on a shared multiuser system, you should consult the
installation manual on how to fix this.

I'd appreciate any help in resolving this.

Thanks!

 

[cPanelMichael]

Hello,

Can you verify if the "EXPERIMENTAL: Jail Apache Virtual Hosts using mod_ruid2 and cPanel® jailshell" option is enabled under the "Security" tab in "WHM >> Tweak Settings" on this system? If so, does temporarily disabling this option solve the issue?

Thank you.

 

[Jim Ratliff]

Michael:
1) Yes, the Experimental option WAS enabled (even though it said that disabled was the default—Looking over my notes from when I set this server up, for some reason I elected to change the default by enabling this option).
2) I disabled this option and SAVE-d.
3) Success! I can now reach those pages (from external to cPanel).

You said "temporarily disabling this option." Should I just leave it disabled and announce victory? Or are you suggesting that there's a good reason to leave it enabled.

Thanks!

 

[cPanelMichael]

Hello,

The option is known to have some compatibility issues with Mailman (internal case CPANEL-9501 is open for this). There's currently no time frame on a potential solution, so for now it's likely a better approach to keep it disabled.

Thank you.

 

[Jim Ratliff]

Thanks, Michael! My problem is now solved.