ibzib edited a comment on pull request #12397:
URL: https://github.com/apache/beam/pull/12397#issuecomment-665351269
> For an existing cluster, isn't it as simple as passing the flink master
URL? If so, I think that's worth stating.
For a local cluster, yes (we can just use loopback). Or at least I thought
so. I tried this on my local Flink 1.10 cluster:
```sh
python -m apache_beam.examples.wordcount --input /path/to/inputfile \
--output /path/to/write/counts \
--runner FlinkRunner \
--environment_type LOOPBACK \
--flink_master localhost:8081 \
--flink_version 1.10
```
But I got an error:
`ERROR:root:org.apache.flink.runtime.rest.util.RestClientException: [Failed
to deserialize JobGraph.]`
This [Stack Overflow
post](https://stackoverflow.com/questions/58358308/flink-submitting-job-failed-to-deserialize-jobgraph)
suggests a Flink version incompatibility might be the cause, but both the job
server jar and the Flink cluster are Flink 1.10, so I'm not sure what's going
on.
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