[petsc-dev] Recover from TS failure

[Mark Adams]

On Wed, Nov 1, 2017 at 7:21 PM, Jed Brown <jed at jedbrown.org> wrote:

> Mark Adams <mfadams at lbl.gov> writes:
>
> >>
> >>
> >>
> >> You're in PetscTraceBackErrorHandler which is way too late.  Back up.
> >> What caused the error?
> >>
> >>
> > SNES problem. It can be linear solver error,  max its, or line search
> > failure. See attached.
> >
> > I see that I want to unset TS->errorifstepfailed. I see how to do that
> with
> > SNES, Will look again for TS,
>
> Dude, back up.  You need to find out why the TS implementation is
> reporting ts->reason < 0.  If it's a SNES failure and it repeats when
> the step is shortened, you need to fix that.
>

It does not repeat, it just fails and aborts. It never gets to my recover
code.

I see *-ts_error_if_step_fails *

I can set that to false right?

And I don't see a function interface.


> You can avoid an error by calling TSSetErrorIfStepFails(), but all the
> logic you're talking about is already in TS and jury-rigging it on the
> outside is counterproductive.  So get back to the root of the problem
> and debug why SNES is failing.
>
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