Hello Kyle,  reply below.
Also,  what is the stack to run this as production setup on gcloud?? I can try 
that setup to see if this works.

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________________________________
From: Kyle Weaver <kcwea...@google.com>
Sent: Thursday, May 28, 2020, 10:34 PM
To: user@beam.apache.org
Subject: Re: Issue while submitting python beam pipeline on flink - local

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> You are using the LOOPBACK environment which requires that the Flink
> cluster can connect back to your local machine. Since the loopback
> environment by defaults binds to localhost that should not be possible.

On the Flink runner page, we recommend using --net=host to avoid the kinds of 
networking issues Ashish is experiencing. But the Docker documentation says the 
host networking option is only available on Linux 
(https://docs.docker.com/network/host/). You will either have to:
a) expose the required ports, or ==>  I tried exposing 8099 and not using 
--net=host on docker desktop for windows and it did not work. I also tried 
running job server on gcloud shell and submitting pipeline over gcloud shell 
after setting up all requirements. it fails with same errors as local.
b) run the job server in a local process instead of a Docker container, as 
described in older versions of the documentation  ==> I havent tried it yet.
(https://web.archive.org/web/20191228110311/https://beam.apache.org/documentation/runners/flink/)

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