Github user nchammas commented on the pull request:

    https://github.com/apache/spark/pull/4262#issuecomment-71971574
  
    > FWIW I actually found the dots useful to figure out how long the script 
was going to wait before trying again
    
    I find this useful too, but it doesn't work when we throw in the SSH 
output, since the dots and SSH output mix. I could look into a solution for 
that.
    
    > Will we just see an SSH error message now in place ?
    
    Now we'll just see 3 dots followed by the start of a cluster build if 
everything goes well, and 3 dots followed by SSH output if something is 
potentially broken (as in the example above). In the former case the wait time 
until `ssh-ready` will still be printed as before.


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