Async rpc parallel worker how to report errors

I’m currently trying to understand some of the internals of the rpc_parallel library.

The issue I’m having is that a connection to a local worker is dying randomly.

I think that that worker may be raising an exception and dying, however I haven’t been able to get the Fd_redirection to work so can’t get that output (it is just raising a permission denied error no matter what I do… Permissions on the folder are 0o777 so that shouldn’t be tripping it).

Additionally is the design that the connection to a local worker should not fail until you explicitly close it / the local worker has a failure?