On Wed, 7 Nov 2018 at 10:40, Scott van Looy via users
<users(a)lists.fedoraproject.org> wrote:
Since the upgrade to F29 my HTTPD has been shutting down around 3am
every night. I’d like to try and investigate why, but the only thing in the log is:
[mpm_event:notice] [pid 1096508:tid 140027704744192] AH00492: caught SIGWINCH, shutting
down gracefully
These all happen at roughly the same time, but not the exact same time - around 3am
Semi-regular times like "around 3am" generally imply something being
governed by Anacron's variable task scheduler which will randomise the
time of cron jobs. Since this is daily, I'd start by taking a look at
your daily crons and see if any of them might relate to the issue -
most likely a log rotation tool or something along those lines.
SIGWINCH isn't one of the more common signals you'll interact with
like TERM, but it supposedly relates to "WINdow CHange", or a change
in the size of the controlling terminal's window size - e.g. to tell a
shell like bash that the terminal emulator window has been resized and
it now needs to wrap at a different number of characters. However it
seems Apache doesn't use it entirely correctly so it may be that your
log rotation tool is actually stopping the daemon rather than HUPing
it as it should.
Andy