It was a bug actually, sent PR to beam.
Cross-posting from https://groups.google.com/forum/#!topic/kythe/86kNuSCeorI, since I was directed here by Beam faq for Beam questions.
In short, I run a job written using the
golang sdk successfully using the
direct runner, but trying to use the
dataflow runner I get the following error in the google cloud console:
2019-02-17 (12:03:53) Step with name e19 already exists. Duplicates are not allowed.
I'm not very familiar with beam yet. I wonder which part is responsible for generating the step names? What are likely causes of a collision?