Experimental Physics and
Industrial Control System



Hi Ralph,

I actually feared, that is has nothing to do with procserv or the ioc itself.
Unfortunately I'm not an expert for systemd myself, but I hope someone in this forum has some ideas....

Cheers,
Florian

On 5/23/22 10:54, Ralph Lange via Tech-talk wrote:

Hi Florian, 

Doesn't the third line of your log

On Mon, 23 May 2022 at 10:32, Florian Feldbauer via Tech-talk <tech-talk at aps.anl.gov> wrote:

Hey all,

I currently have a problem with procserv.
I'm using the latest commit from github compilied on Raspbian OS bullseye.

I used manage-procs to create a service but the service gets stopped
every now and then.
The actual runtime seems to be quite arbitrary. Sometimes a few secs
sometimes several hours.
The log output does not really contain any helpfull information.
Any idea what could causing procserv to shut down?

CPU and RAM usage are way below 10% when the IOC is running.


Cheers,
Florian


pi@scatterchamber:~ $ systemctl --user status procserv-epicsioc.service
● procserv-epicsioc.service - procServ for epicsioc
      Loaded: loaded
(/home/pi/.config/procServ.d/procserv-epicsioc.service; enabled; vendor
preset: enabled)
      Active: inactive (dead)

May 23 10:10:17 scatterchamber procserv-epicsioc[58686]: 2022/05/23
10:10:17.505 drvModbusAsyn::doModbusIO port chillerReadReg error calling
writeRead, error=PilotONE-187144:502 TCP timeout>
May 23 10:10:18 scatterchamber procserv-epicsioc[58686]: 2022/05/23
10:10:18.604 drvModbusAsyn::doModbusIO port chillerReadReg writeRead
status back to normal having had 1 errors, nwrite=6/>

i.e., the next one

 

May 23 10:10:45 scatterchamber systemd[58650]: Stopping procServ for
epicsioc...
May 23 10:10:45 scatterchamber procserv-epicsioc[58686]: @@@ Current
time: Mon May 23 10:10:45 2022
May 23 10:10:45 scatterchamber procserv-epicsioc[58686]: @@@ Child
process is shutting down, a new one will be restarted shortly
May 23 10:10:45 scatterchamber procserv-epicsioc[58686]: @@@ ^R or ^X
restarts the child, ^Q quits the server, ^D closes this connection
May 23 10:10:45 scatterchamber systemd[58650]:
procserv-epicsioc.service: Succeeded.
May 23 10:10:45 scatterchamber systemd[58650]: Stopped procServ for
epicsioc.
May 23 10:10:45 scatterchamber systemd[58650]:
procserv-epicsioc.service: Consumed 1.799s CPU time.

 

suggest that systemd is deliberately shutting down the IOC?

The following log lines definitely look like procServ was told to shut down the child process.

I'm not a systemd expert enough to know what could cause that (wrong dependencies between services maybe?), but this doesn't really look like something originating within procServ or the child process.

Cheers,
~Ralph

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Ruhr-Universität Bochum
AG der Experimentalphysik I
Dr. Florian Feldbauer
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