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Posted to dev@storm.apache.org by rsltrifork <gi...@git.apache.org> on 2015/10/01 13:38:05 UTC

[GitHub] storm pull request: [STORM-886] Automatic Back Pressure (ABP)

Github user rsltrifork commented on the pull request:

    https://github.com/apache/storm/pull/700#issuecomment-144703338
  
    Does this solve the problem of tuple timeout, when a bolt is completely stalled waiting for an external component to get back up?
    I believe waiting for too long in a bolt triggers the tuple timeout, which causes the Spout to reemit, which is usually not what we want, when a bolt is waiting in a controlled manner before it can resume computation. 
    
    Ideally, the tuple timeout should be used as a last resort to detect that internal storm components don't respond. And back pressure should ensure that the Spout doesn't reemit to temporarily busy/blocked bolts - regardless of timeout.


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