[jira] [Created] (BEAM-3587) User reports TextIO failure in FlinkRunner on master

["Kenneth Knowles (JIRA)" <ji...@apache.org>]

Kenneth Knowles created BEAM-3587:
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             Summary: User reports TextIO failure in FlinkRunner on master
                 Key: BEAM-3587
                 URL: https://issues.apache.org/jira/browse/BEAM-3587
             Project: Beam
          Issue Type: Bug
          Components: runner-flink
            Reporter: Kenneth Knowles
            Assignee: Ben Sidhom
             Fix For: 2.3.0


Reported here: [https://lists.apache.org/thread.html/47b16c94032392782505415e010970fd2a9480891c55c2f7b5de92bd@%3Cuser.beam.apache.org%3E]

"I'm trying to run a pipeline containing just a TextIO.read() step on a Flink cluster, using the latest Beam git revision (ff37337). The job fails to start with the Exception:

  {{java.lang.UnsupportedOperationException: The transform  is currently not supported.}}

It does work with Beam 2.2.0 though. All code, logs, and reproduction steps  [https://github.com/pelletier/beam-flink-example]"

My initial thoughts: I have a guess that this has to do with switching to running from a portable pipeline representation, and it looks like there's a non-composite transform with an empty URN and it threw a bad error message. We can try to root cause but may also mitigate short-term by removing the round-trip through pipeline proto for now.

What is curious is that the ValidatesRunner and WordCountIT are working - they only run on a local Flink, yet this seems to be a translation issue that would occur for local or distributed runs.

We need to certainly run this repro on the RC if we don't totally get to the bottom of it quickly.



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