Bug in Mailman Problem

brianc

Well-Known Member
May 16, 2003
191
7
168
We are seeing a "Bug in Mailman" now appearing in many of our mailman lists across multiple servers. It is only triggered when you go to view "Tend to Pending Moderator Request" page. It has something to do with the request.pck file. Removing the file fixes it. However the list no longer sees any pending moderator requests if there were any. We see this on lists with no pending requests and we see it on lists with pending requests.

I strongly believe this is a cPanel issue as it is impacting multiple lists on multiple servers and it seemed to pop up in the last 48 hours.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,227
463
I strongly believe this is a cPanel issue as it is impacting multiple lists on multiple servers and it seemed to pop up in the last 48 hours.
Hello,

Could you open a support ticket using the link in my signature so we can take a closer look at one of the affected systems? Please post the ticket number here and we will update this thread with the outcome.

Thank you.
 

brianc

Well-Known Member
May 16, 2003
191
7
168
Here you go:

Your Support Request ID is: 9323441
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,227
463
Hello Jim,

In ticket 9323441, the solution was to remove the corrupted pending.pck file from the /usr/local/cpanel/3rdparty/mailman/lists/$list-name/ directory. Note this removes the pending requests for the mailing list.

Additionally, internal case CPANEL-23687 was published in cPanel & WHM version 76 to help prevent this from happening in the future:

Fixed case CPANEL-23687: Ensure python pickle sanitization preserves integer keys.

Thank you.