[CentOS] another bizarre thing...

Fred Smith
Tue, 06 Aug 2019 03:02:30 -0000

On Tue, Aug 06, 2019 at 01:54:56AM +0000, Grant Street
wrote:
> Try checking your /var/log/messages for OOM killer log lines. If your
machine is running low on memory the oom killer will start killing high memory
usage programs.
>
> Grant

we have watched top while it runs and there's no evidence of a memory
shortage.

> ________________________________________
> From: CentOS <centos-bounces at centos.org> on behalf of Fred Smith
<fredex at fcshome.stoneham.ma.us>
> Sent: Tuesday, 6 August 2019 10:57 AM
> To: centos at centos.org
> Subject: [CentOS] another bizarre thing...
>
> Hi all!
>
> I'm stuck on something really bizarre that is happening to a product
> I "own" at work. It's a C program, built on CentOS, runs on
CentOs or
> RHEL, has been in circulation since the early 00's, is in use at
> hundreds of sites.
>
> recently, at multiple customer sites it has started just going away.
> no core file (yes, ulimit is configured), nothing in any of its
> (several) log files. it's just gone.
>
> running it under strace until it dies reveals that every thread has
> been given a SIGKILL.
>
> How does one figure out who deliverd a SIGKILL? For other, non-fatal,
> signals it is possible to glean the PID of the sending process in a
> signal  handler, but obviously you can't do that for SIGKILL because
> the app doesn't survive the signal.
>
> I'm grasping at straws here, and am open to almost any kind of
> suggestion that can be followed-up (as compared to "beats me"
which
> is where I am now).
>
> I'm even wondering if systemd has something to do with it.
>
> Thanks in advance!
> --
> ---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
>                But God demonstrates his own love for us in this:
>                          While we were still sinners,
>                               Christ died for us.
> ------------------------------- Romans 5:8 (niv)
------------------------------
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> --
> Grant Street
> Senior Systems Engineer
>
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--
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
                         God made him who had no sin
                      to be sin for us, so that in him
                 we might become the righteousness of God."
--------------------------- Corinthians 5:21 ---------------------------------