Hello, I noticed that the calls to the JobServer from the Python SDK do not have timeouts. If I'm not mistaken that means that the call to pipeline.run() could hang forever if the JobServer is not running (or failing to start). E.g. https://github.com/apache/beam/blob/master/sdks/python/apache_beam/runners/portability/portable_runner.py#L307 the call to Prepare() doesn't provide any timeout value and the same applies to other JobServer requests. I was considering adding a --job-server-request-timeout to the PortableOptions <https://github.com/apache/beam/blob/master/sdks/python/apache_beam/options/pipeline_options.py#L805> class to be used in the JobServer interactions inside probable_runner.py. Is there any specific reason why the timeout is not currently supported? Does anybody have any objection adding the jobserver timeout? I could volunteer to file a ticket and submit a pr for this.
Cheers, Enrico Canzonieri
