Is task delivery exactly once as in a SQS FIFO queue?

Question

Hi  
  
AWS Step Functions looks pretty promising for our use case according to our study.  
However, regarding the technical guarantees of `GetActivityTask`, I wonder could you confirm that the semantics are similar to that of a SQS FIFO queue?  
  
Searching on the forum seems to imply that's the case:  
  
https://forums.aws.amazon.com/thread.jspa?threadID=252251&tstart=0  
https://forums.aws.amazon.com/thread.jspa?threadID=253480&tstart=75  
  
However, it would be great if you could confirm that tasks delivered by Step Functions have exactly once semantics.  
  
Thanks!

Answer

Yes. AWS StepFunctions provides exactly-once semantics on GetActivityTask

Answer

hmm I'm still waiting on this confirmation from AWS team and it is rather frustrating not getting an official answer. There is no information on this anywhere else.   
  
I am holding off on our production release until I have an answer. At this stage, I am not even sure if Step function is the right choice or production ready given AWS team isn't transparent on such a basic behavior. I am the third person asking this question without an answer.  
  
Is there anyone moderating this forum, seems very poor customer service. Very frustrated !!

Answer

Yes, it'd be great to get a confirmation that `GetActivityTask` guarantees no duplicates will be delivered for exactly-once processing on the workers.

Answer

@techwharf  did you find out the answer to this ?  
can someone in aws step function team answer this, please ?

Answer

anyone from AWS team cares to comment?

Is task delivery exactly once as in a SQS FIFO queue?

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