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From kant kodali <kanth...@gmail.com>
Subject Re: Do I need to do .collect inside forEachRDD
Date Tue, 05 Dec 2017 21:38:51 GMT
Reads from Kafka and outputs to Kafka. so I check the output from Kafka.

On Tue, Dec 5, 2017 at 1:26 PM, Qiao, Richard <Richard.Qiao@capitalone.com>
wrote:

> Where do you check the output result for both case?
>
> Sent from my iPhone
>
> > On Dec 5, 2017, at 15:36, kant kodali <kanth909@gmail.com> wrote:
> >
> > Hi All,
> >
> > I have a simple stateless transformation using Dstreams (stuck with the
> old API for one of the Application). The pseudo code is rough like this
> >
> > dstream.map().reduce().forEachRdd(rdd -> {
> >      rdd.collect(),forEach(); // Is this necessary ? Does execute fine
> but a bit slow
> > })
> >
> > I understand collect collects the results back to the driver but is that
> necessary? can I just do something like below? I believe I tried both and
> somehow the below code didn't output any results (It can be issues with my
> env. I am not entirely sure) but I just would like some clarification on
> .collect() since it seems to slow things down for me.
> >
> > dstream.map().reduce().forEachRdd(rdd -> {
> >      rdd.forEach(() -> {} ); //
> > })
> >
> > Thanks!
> >
> >
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