Starting attempt 2 of 1

[Alex Nastetsky]

My task did not have retries set on it (so I would expect to only try
running it once, with the default retries of 0).
Instead, it retried running the task after it failed... 6 hours after the
first attempt.
Why did it retry? The logs even say there should only be 1 attempt, as it
says "Starting attempt 2 of 1".