resource monitor does not work with coffea casa

[btovar]

Tasks fail with:

The futex facility returned an unexpected error code.

[btovar]

Sometimes it works. It looks like an ugly race condition, not sure from where.

[dthain]

Wow, that's a scary one. Is the RM even interposing on sync-related things?

[btovar]

It is not as far as I can tell. It might be that it adds enough overhead to trigger something. I'm not sure if it is because we are running inside a container, or it is something that python is doing...

[btovar]

The resource_monitor does not work, but the monitored decorator inside python works!

[btovar]

Ah, spoke too soon. It doesn't work for all functions, probably the same issue.

[btovar]

To add to the mystery. If the task is within its resources, then it runs correctly to completion and its resources are correctly measured.

[dthain]

Maybe this is some interaction with container technologies?

[btovar]

I think so. "Unfortunately" our tests with github actions that run inside containers seem to work.