exim - bad file descriptor

[Steve <dlist@bluewin.ch>]

Hi,

Running Debian bookworm fully updated.

Since a couple of weeks, i see strange lines in the logs:

2023-06-04T06:30:54.117016+02:00 box exim[24894]: 2023-06-04 06:30:54 1q5fOD-0006TT-2C failed to write to main log: length=91 result=-1 errno=9 (Bad file descriptor)
2023-06-04T06:30:54.150516+02:00 box exim[24894]: write failed on panic log: length=116 result=-1 errno=9 (Bad file descriptor)
jun 04 06:30:54 box.lan exim[24894]: 2023-06-04 06:30:54 1q5fOD-0006TT-2C failed to write to main log: length=91 result=-1 errno=9 (Bad file descriptor)
jun 04 06:30:54 box.lan exim[24894]: write failed on panic log: length=116 result=-1 errno=9 (Bad file descriptor)

Exim seems to work ok for internal mail.

Looked for information on the Net but didn't find anything that helped.

The setup must be Debian standard since I haven't tweaked any config
files (I don't know how to do that and I don't have any reason to do it,
I'm just using exim as internal mta).

It seems that /var/log/exim4/mainlog is filling up normally. I don't see
any panic log file in there though (what is a panic log). /var has
enough space left.

Why am I receiving the bad file desciptor log?

Thanks.

s.