[PATCH] Revert "report error when virProcessGetStatInfo() is unable to parse data"

[Ani Sinha]

On Thu, 20 Jan 2022, Andrea Bolognani wrote:

> On Tue, Jan 18, 2022 at 12:44:51PM +0100, Michal Privoznik wrote:
> > +++ b/src/util/virprocess.c
> > @@ -1784,10 +1784,7 @@ virProcessGetStatInfo(unsigned long long *cpuTime,
> >          virStrToLong_ullp(proc_stat[VIR_PROCESS_STAT_STIME], NULL, 10, &systime) < 0 ||
> >          virStrToLong_l(proc_stat[VIR_PROCESS_STAT_RSS], NULL, 10, &rss) < 0 ||
> >          virStrToLong_i(proc_stat[VIR_PROCESS_STAT_PROCESSOR], NULL, 10, &cpu) < 0) {
> > -        virReportError(VIR_ERR_INTERNAL_ERROR,
> > -                       _("cannot parse process status data for pid '%d/%d'"),
> > -                       (int) pid, (int) tid);
> > -        return -1;
> > +        VIR_WARN("cannot parse process status data");
>
> Shame to lose the improved error/warning message. Perhaps it could be
> reintroduced separately.
>

Functions in general are not coded around success path only. Most
well written functions have a success path and an error path. In case of
error, they should be able to report warning/errors. If raising an error
from a function causes a breakage of an external api, then that is an
architectural problem imho. Instead of reverting the error/warning, we
should try to fix the larger problem at hand in the longer term.