Valentyn Tymofieiev created BEAM-8418:
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Summary: Fix handling of Impulse transform in Dataflow runner.
Key: BEAM-8418
URL: https://issues.apache.org/jira/browse/BEAM-8418
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Reporter: Valentyn Tymofieiev
Following pipeline fails on Dataflow runner unless we use beam_fn_api
experiment.
{noformat}
class NoOpDoFn(beam.DoFn):
def process(self, element):
return element
p = beam.Pipeline(options=pipeline_options)
_ = p | beam.Impulse() | beam.ParDo(NoOpDoFn())
result = p.run()
{noformat}
The reason is that we encode Impluse payload using url-escaping in [1], while
Dataflow runner expects base64 encoding in non-fnapi mode. In FnApi mode, DF
runner expects URL escaping.
We should fix or otherwise the encoding in non-FnAPI path, and add a
ValidatesRunner test that catches this error.
[1]
https://github.com/apache/beam/blob/12d07745835e1b9c1e824b83beeeadf63ab4b234/sdks/python/apache_beam/runners/dataflow/dataflow_runner.py#L633
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