Xbox One disconnects from test runner

[joeyparrish]

The Xbox One in our lab disconnects from the test runner most of the time. The rate of this occurring is not consistent, but I have not been able to get 5 successful test runs in a row on Xbox. When the disconnect occurs, the device appears to briefly hang. There is no log to indicate what test was running at the time because log delivery to the test runner is not synchronous.

Through trial and error disabling certain subsets of the tests and doing 5 test passes, I found that disabling streaming_engine_unit.js alone is enough to get the tests to complete successfully. So the trigger is some or all of the tests in that file.

[joeyparrish]

I found that excluding EMSG tests from streaming_engine_unit.js seems to make Xbox reliably complete the tests without disconnecting. Stopping emsg parsing right before calling box.reader.readBytes() also seems to do this.

Sadly, the problem goes away when I add console logs to readBytes(). So it looks like this is not going to be a straightforward problem to solve.