On 2020-06-16 19:20, Guido van Rossum wrote:
Has anybody brought up the problem yet that if one subinterpreter
encounters a hard crash (say, it segfaults due to a bug in a C extension
module), all subinterpreters active at that moment in the same process
are likely to lose all their outstanding work, without a chance of recovery?
(Of course once we have locks in shared memory, a crashed process
leaving a lock behind may also screw up everybody else, though perhaps
less severely.)
Not really.
Asyncio has the same problem; has anyone brought this issue up there?
(Granted, asyncio probably didn't uncover too many issues in extension
modules, but if it did, I assume they would get fixed.)
If you're worried about segfaults, then you should use multiple
processes. That will always give you better isolation. But I don't think
it's a reason to stop improving interpreter isolation.
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