That's the gist of it; tracking position of a long running process by writing messages back into the SQS queue. Any of the numerous edge cases that will cause a

That's the gist of it; tracking position of a long running process by writing messages back into the SQS queue. Any of the numerous edge cases that will cause a dupe record to appear(some of them documented SQS implementation details) would cause the process to duplicate :| Then triplicate :|