I’ll be glad to open a jira, though the problem is hardly coherent imo, what would you like to see there? Simply “Disordering of drop events” and the explanation I have here? Sadly I cannot provide a concrete example since the problem does not reproduce.
On Wed, 22 Nov 2017 at 18:23 Joe Witt <joe.w...@gmail.com> wrote: > also - awesome find! And glad you're at such a level with provenance > data to catch that. Thanks Omer! > > On Wed, Nov 22, 2017 at 11:21 AM, Mark Payne <marka...@hotmail.com> wrote: > > Omer, > > > > This is likely an issue related to the order in which we generate those > events in the framework. > > Do you mind filing a JIRA? > > > > Thanks > > -Mark > > > > > >> On Nov 22, 2017, at 10:51 AM, Omer Hadari <hadari.o...@gmail.com> > wrote: > >> > >> Hi! > >> We’ve been using NiFi for a while now, and we save all provenance > events for logging purposes and such. We encountered an issue while looking > at lineages of some flow files, which showed drop events as if they > happened before another event, that in fact preceded it (and indeed has a > lower event ordinal). > >> > >> For example in a split json processor, the original FlowFile is dropped > after all splits happen and are assigned fragment counts, but still the > timestamp of the drop event is earlier than the timestamp of the attributes > modified event. That causes the graph to look as if the attributes modified > event comes out of the drop event, which doesn’t really make sense to us > (should it?). It’s probably worth noting that the drop event ordinal is > higher than the attributes modified event ordinal. Also we noticed that > >> 1. This only happens every once per a few thousand events. > >> 2. This does not reproduce by replaying. > >> 3. The drop event’s timestamp is earlier by 1ms in the cases we > encountered, and the ordinal is always larger by one. > >> > >> This might be an error with the split json processor or a more general > one. We’d love any clues or corrections to misconceptions we might have > (maybe this is not a problem and drop events can precede other events?) > >> > >> Thank you! > > >
