Issue PleskFilter: Unable to set close-on-exec on connfd (Bad file descriptor)

[moswak]

Server operating system version

CentOS Linux 7.9

Plesk version and microupdate number

18.0.55 Update #2

Hi,
Last night the maillog was suddenly full of messages like
PleskFilter: Unable to set close-on-exec on connfd (Bad file descriptor)

what does this message mean?
I've searched but can't find anything related to Plesk.

 

[Peter Debik]

It's related to the file system management of the operating system, but details would need to be examined on the server. Maybe you are out of disk space or inodes, maybe the disk has errors. Can you find more issues at the same timestamp, e.g. in /var/log/messages?

 

[moswak]

the server didn't have any exceptions
No, unfortunately there are no clues in the log
I restarted all services once and performed plesk repair for web, mail and installation.
Since then it has looked ok. I have to keep watching.