hi

i am confused

the delay in in the source when reading message not on the sink

nick

‫בתאריך יום ב׳, 21 בדצמ׳ 2020 ב-18:12 מאת ‪Yun Gao‬‏ <‪yungao...@aliyun.com
‬‏>:‬

>  Hi Nick,
>
>     Are you using EXACTLY_ONCE semantics ? If so the sink would use
> transactions, and only commit the transaction on checkpoint complete to
> ensure end-to-end exactly-once. A detailed description could be find in [1]
>
>
> Best,
>  Yun
>
>
> [1]
> https://flink.apache.org/features/2018/03/01/end-to-end-exactly-once-apache-flink.html
>
> ------------------------------------------------------------------
> Sender:nick toker<nick.toker....@gmail.com>
> Date:2020/12/21 23:52:34
> Recipient:user<user@flink.apache.org>
> Theme:checkpoint delay consume message
>
> Hello,
>
> We noticed the following behavior:
> If we enable the flink checkpoints, we saw that there is a delay between
> the time we write a message to the KAFKA topic and the time the flink kafka
> connector consumes this message.
> The delay is closely related to checkpointInterval and/or
> minPauseBetweenCheckpoints meening that the MAX delay when consuming a
> message from KAFKA will be one of these parameters.
>
> Could you please advise how we can remove/control this delay?
>
> we use flink 1.11.2
>
> BR
> nick
>
>

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