Github user nchammas commented on the pull request:

    https://github.com/apache/spark/pull/3986#issuecomment-69473834
  
    Hmm, sucks that boto still prints that error.
    
    Getting errors on `i.update()` seems to be part of AWS's general flakiness 
when propagating metadata info. The tag operations probably got servers that 
knew about the new instances, but the update operation got one that didn't.
    
    It would be better if we could avoid adding arbitrary waits everywhere just 
to work around this problem with AWS. Is there something more direct we can do? 
Though honestly, maybe just adding a second inside `wait_for_cluster_state()` 
like you suggested is sufficient.
    
    cc @JoshRosen @shivaram


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