Due to an old issue with tornado<6.1, we are currently using the SelectorEventLoop on Windows. However, that event loop does not support subprocesses. This causes the SubprocessCluster in #7431 to not support Windows.
Upgrading to tornado>=6.1 should allow us to use the default ProActorEventLoop (see #5833 for a dormant PR on this).
Due to an old issue with
tornado<6.1, we are currently using theSelectorEventLoopon Windows. However, that event loop does not support subprocesses. This causes theSubprocessClusterin #7431 to not support Windows.Upgrading to
tornado>=6.1should allow us to use the defaultProActorEventLoop(see #5833 for a dormant PR on this).