found the answer. https://groups.google.com/forum/#!searchin/storm-user/congestion Thanks -Mo
2014-03-31 11:55 GMT-05:00 Dong Mo <[email protected]>: > Dear list, > > I was wondering what is the best practice to do synchronization in storm > or is it possible to have congestion collapse in Storm? > > Say I have a spout-boltA-boltB topo and the boltB happen to be very slow. > Bolt A is emitting data much faster than Bolt B can process. If I do > nothing, will failure handling mechanism be triggered and Bolt A will put > all things not acked to Bolt B again and further burden the system. Finally > Bolt A become slow due to the accumulated queue and Spout A will trigger > tuple retransmitting too and the whole system fails. > > Is that possible to happen? > > Thanks > -Mo Dong >
