To sum this up, the web dashboard stats are Flink network stats. If you job has no network communication, its all zero.
On Mon, Dec 14, 2015 at 5:03 PM, Ufuk Celebi <u...@apache.org> wrote: > > > On 14 Dec 2015, at 16:25, Niels Basjes <ni...@basjes.nl> wrote: > > > > Hi, > > > > I have a very small topology here. > > In fact this is a thing that generates synthetic data and puts it into > Kafka. > > When looking at the web UI I see that all counters (i.e. Bytes received, > Records received, Bytes sent, Records sent) all remain 0. > > I verified and I'm seeing thousands of records arriving into Kafka. > > > > Is this a bug in Flink or am I misinterpreting the meaning of these > numbers? > > Sources and sinks do not show the number of received or sent records, > because of the internals of how these numbers are collected. I agree that > this is confusing. Big +1 to improve this. > > You actually don’t see any numbers, because the operators are chained and > hence you only have one task, which acts as both source and sink. > > You should see some sent and received numbers if you break up the chain > (env.disableOperatorChaining()). Can you confirm this? > > – Ufuk > >
