Bob Proulx:
> Any ideas on why postfix would not be running after such an event on
> two of the systems but okay on the others?

Wietse Venema wrote:
LOGS. Postfix logs a sh*load, including processes that fail to
start. If the systems were unable to record this in LOGS, then you
will never know.

On 22.12.21 21:41, Bob Proulx wrote:
I guess we will never know then.  Because I showed the relevant logs.
I would have showed more but the large message was rejected due to
size.  But there wasn't anything more clueful than the logs I showed.

It's not terribly important.  It was just an oddity.  Because Postfix
is so very reliable that it was unusual to see on two systems it had
stopped.  But again it is very unusual to have the root file system
blocking for so long.

it's still possible that:
- postfix was killed by e.g. OOM killer, in which case it could not log
that.
- the logs were lost because of systemd's log limits

there are multiple lined of postfix/master.

it also could be systemd restarting postfix and giving up after some time

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