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From Marcelo Vanzin <van...@cloudera.com>
Subject Re: [Spark-core] why Executors send HeartBeat to driver but not App Master
Date Fri, 02 Mar 2018 18:30:08 GMT
The app master doesn't have anything it needs to periodically tell the
driver, so there was no need for a heartbeat.

On Fri, Mar 2, 2018 at 1:44 AM, sandeep_katta
<sandeep0102.opensource@gmail.com> wrote:
> I want to attempt *SPARK-23545* bug,so I have some questions regarding the
> design,
>
> I am analyzing the  communications between App Master->Driver and
> Executor->Driver and found that only Executors send HeartBeat to Driver.
>
> As per design Executor sends HearBeat to Driver for every
> "spark.executor.heartbeatInterval" interval.
>
> Why does the App Master does not have same mechanism,was there any
> reason/limitation behind this ?
>
>
> Thanks
> Sandeep
>
>
>
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-- 
Marcelo

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