I added a JIRA for this feature request: https://issues.apache.org/jira/browse/FLINK-4812
On Fri, Sep 30, 2016 at 6:13 PM, dan bress <danbr...@gmail.com> wrote: > Awesome! It would definitely help me troubleshoot lagging watermarks if i > can see what watermark all my sources have seen. Thanks for looking into > this! > > Dan > > On Fri, Sep 30, 2016 at 5:48 AM Stephan Ewen <se...@apache.org> wrote: > > > I think what you describe, Chesnay, is exactly what we should do... > > > > On Fri, Sep 30, 2016 at 1:15 PM, Chesnay Schepler <ches...@apache.org> > > wrote: > > > > > Hello Dan, > > > > > > the technical reason is that this metric is only collected in the > > > *InputProcessor classes, which aren't used for source tasks. > > > > > > I do recall that there were discussions about source watermarks, but > > > frankly i don't remember why we didn't add them. > > > > > > In order to add them one would only have to modify the SourceContext > > > classes to a) store the last emitted watermark and b) expose it > through a > > > metric. > > > > > > Regards, > > > Chesnay > > > > > > > > > On 29.09.2016 23:03, dan bress wrote: > > > > > >> I am trying to measure the currentLowWatermark throughout my dataflow, > > but > > >> I am not seeing it for tasks with sources. For those tasks I see > these > > >> metrics: > > >> > > >> lastCheckpointSize > > >> numBytesInLocal > > >> numBytesInRemote > > >> numBytesOut > > >> > > >> why am I not seeing currentLowWatermark on these tasks? > > >> > > >> Thanks! > > >> > > >> Dan > > >> > > >> > > > > > >
