Regular topologies do not provide a time order guarantee but provide at least once guarantees (which means that each tuple will be processed once or more times). If you want order guarantees or exactly once semantics you will have to use Trident.
Regards On Wed, Jun 10, 2015 at 12:25 AM [email protected] <[email protected]> wrote: > Hi, > > I'm a beginner in Storm and would appreciate your help. > Does Storm (not using Trident or Transactional topologies) guarantee that > a message that is sent to spout first will always be committed first over > all stages of spouts/bolts (even in the case of failure)? i.e. the message > arrived at time "t" will always be committed before the message arrived at > time "t+T" for some delay T over all stages of spouts/bolts? Thanks a lot. > > Best regards, > M.Y. >
