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I'd suggest looking into why the write is not finishing. If that's actually blocking, whatever you do at the higher level is not going to get very far.

Are you sure it's blocking or is it not just getting overloaded and every time you sample it's in the the same write call but a different instantion of it? It's quite easy to have the console output be the limiting factor for things turning over if you have a lot of output.

If you can provide a small self contained example that would be very helpful in figuring out what's going on.