steveloughran commented on pull request #2684:
URL: https://github.com/apache/hadoop/pull/2684#issuecomment-775058042


   Thanks @mukund-thakur 
   
   Had some thoughts over the w/e
   
   1. The call should return something, `AbortOutcome` which can include a list 
of non-critical exceptions caught during the call, just for diags. And to give 
us the option of adding IOStatistics to an impl
   2. change the spec to differentiate "ops which MUST succeed for abort" 
(which for s3a is a no-op) and ops which MAY succeed and are which needed for 
cleanup. The MAY succeed operations SHOULD be best effort, but MUST NOT block 
for retries etc on failures.
   
   The s3a stream abort() does do retries right now, and I think that's 
probably a mistake for something which is only cleanup and is usually invoked 
when things are starting to go wrong (e.g. data post/complete). Saying "no 
retries here", means that we can have a fast abort() rather than a 60-120 
second spin before the failure is caught and swallowed. I'll change the 
relevant bits of s3a abort to `once()` in this situation
   
   Makes sense?


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