Github user nchammas commented on the pull request:
https://github.com/apache/spark/pull/3737#issuecomment-67729750
I suspect the `instance ID 'i-471a82b9' does not exist` errors stem from
tagging the instances in a separate call from the one that launches them. The
time between launch and tagging is so small that occasionally we hit some AWS
metadata replication slowness which manifests as `instance does not exist`.
The fix would be to either tag the instances in the same call that launches
them if possible, and failing that to retry tagging them after a very short
delay (e.g. 0.3s) if the initial attempt fails.
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