[Haskell-cafe] What is the surefire way to handle all exceptions and make sure the program doesn't fail?

[Yifan Yu]

On Wed, Jul 18, 2012 at 4:10 AM, Bardur Arantsson <spam at scientician.net>wrote:

> The most robust way is probably to use a completely independent
> supervisor program, e.g. "upstart", "systemd", "runit", etc. These
> usually have facilities for restarting the supervised program, and a
> rate limit on exactly how often to try that (over a given period of time).
>
> These *won't* work for a program that's deadlocked because an important
> thread has died. For that you'll need either a watchdog (external) or an
> in-program mechanism for "supervised threads" which can catch any and
> all exceptions and restart threads as necessary. This tends to very
> domain-specific, but you might take some inspiration for the way
> supervisor hierarchies work in the actor model.


Hi Bardur, the "supervised threads" sounds like a good approach for me.
Thanks!
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