Hi Prateek,

the missing numbers are an artifact from how the stats are collected.
ATM, Flink does only collect these metrics for data which is sent over connections *between* Flink operators.
Since sources and sinks connect to external systems (and not Flink operators), the dash board does not show receiving byte for sources and sent bytes for sinks.

Best, Fabian

2016-05-16 23:02 GMT+02:00 prateekarora <prateek.arora2k6@gmail.com>:
Hi

In my flink kafka streaming application i am fetching data from one topic
and then process and sent to output topic . my application is working fine
but  flink dashboard shows Source [Bytes/records Received]  and Sink
[Bytes/records sent] is zero.


Duration  Name                             Bytes            Records             Bytes
Records       Status
                                                  Received      Received
sent           sent
3m 15s    Source: Custom Source   0 B              0                   249 MB
3,540       RUNNING


3m 15s    Map -> Sink: Unnamed    203 MB         2,883         0 B                  0
RUNNING



<http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/file/n6941/flink-kafka.png>

what is the reason for not showing correct number ?

Regards
Prateek







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