[ClusterLabs] Antw: [EXT] trace of resource ‑ sometimes restart, sometimes not

[Ulrich Windl]

>>> "Lentes, Bernd" <bernd.lentes at helmholtz-muenchen.de> schrieb am 06.10.2022
um
21:05 in Nachricht
<280206366.19581344.1665083124300.JavaMail.zimbra at helmholtz-muenchen.de>:
> Hi,
> 
> i have some problems with our DLM, so i wanted to trace it. Yesterday i just

> set a trace for "monitor". No restart of DLM afterwards. It went fine as 
> expected.
> I got logs in /var/lib/heartbeat/trace_ra. After some monitor i stopped 
> tracing.
> 
> Today i set a trace for all operations.
> Now resource DLM restarted:
> * Restart    dlm:0                       (             ha-idg-1 )   due to 
> resource definition change
> I didn't expect that so i had some trouble.

# crm configure
edit ...
verify
ptest nograph #!!!
commit

--
If you used that, you would have seen the restart.
Despite of that I wonder why enabling tracing to start/stop must induce a
resource restart.

Bernd, are you sure that was the only thing changed? Do you have a record of
commands issued?

> Is the difference in this behaviour intentional ? If yes, why ? Is there a 
> rule ?
> 
> Furthermore i'd like to ask where i can find more information about DLM, 
> because it is a mystery for me.
> Sometimes the DLM does not respond to the "monitor", so it needs to be 
> restarted, and therefore all depending resources (which is a lot).
> This happens under some load (although not completely overwhelmed).

Regards,
Ulrich

> 
> Thanks.
> 
> Bernd
> 
> -- 
> Bernd Lentes 
> System Administrator 
> Institute for Metabolism and Cell Death (MCD) 
> Building 25 - office 122 
> HelmholtzZentrum München 
> bernd.lentes at helmholtz-muenchen.de 
> phone: +49 89 3187 1241
>        +49 89 3187 49123 
> fax:   +49 89 3187 2294 
> https://www.helmholtz-munich.de/en/mcd 
> 
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