As far as I know that chain between committer and writer is also
required for correctness.
On 16/02/2023 14:53, weijie guo wrote:
Hi wu,
I don't think it is a good choice to directly change the strategy of
chain. Operator chain usually has better performance and resource
utilization. If we directly change the chain policy between them,
users can no longer chain them together, which is not a good starting
point.
Best regards,
Weijie
wudi <676366...@qq.com> 于2023年2月16日周四 19:29写道：
Thank you for your reply.
Currently in the custom Sink Connector, the Flink task will
combine Writer and Committer into one thread, and the thread name
is similar: *[Sink: Writer -> Sink: Committer (1/1)#0]*.
In this way, when the *Committer.commit()* method is very slow, it
will block the*SinkWriter.write()* method to receive upstream data.
The client can use the *env.disableOperatorChaining() *method to
split the thread into two threads:*[Sink: Writer (1/1)#0] *and
*[Sink: Committer (1/1)#0]*. This Committer. The commit method
will not block the SinkWriter.write method.
If the chain policy can be disabled in the custom Sink Connector,
the client can be prevented from setting and disabling the chain.
Or is there a better way to make*Committer.commit()* not block
*SinkWriter.write()*?
Looking forward for your reply.
Thanks && Regards,
di.wu
2023年2月16日 下午6:54，Shammon FY <zjur...@gmail.com> 写道：
Hi
Do you mean how to disable `chain` in your custom sink
connector? Can you
give an example of what you want?
On Wed, Feb 15, 2023 at 10:42 PM di wu <676366...@qq.com> wrote:
Hello
The current Sink operator will be split into two operations,
Writer and
Commiter. By default, they will be chained together and executed
on the
same thread.
So sometimes when the commiter is very slow, it will block the data
writer, causing back pressure.
At present, FlinkSQL can be solved by disabling the chain
globally, and
DataStream can partially disable the chain through the
disableChaining
method, but both of them need to be set by the user.
Can the strategy of the Chain be changed in the Custom Sink
Connector to
separate Writer and Commiter?
Thanks && Regards,
di.wu
