ronoaldo opened a new issue, #23189: URL: https://github.com/apache/beam/issues/23189
### What happened? As mentioned in #22931 - I am testing xlang support for the Go Runtime. I first was doing it wrong, using the Go direct runner, but then I moved on to test with the Dataflow runner. I noticed that on Dataflow Runner, I could call a custom [Java Ptransform](https://github.com/ronoaldo/micro-beam/blob/main/05_xlang/java/src/main/java/com/ronoaldo/SplitWordsFromJava.java) from [Python](https://github.com/ronoaldo/micro-beam/blob/main/05_xlang/pipeline.py):  However,I could not call the same PTransform [from Go](https://github.com/ronoaldo/micro-beam/blob/main/05_xlang/go/pipeline.go). To submit the job, I started the Java expansion service as I did for the Python run, and called my Go pipeline. I see that the expansions service is called from Go, that the Go runtime stages the .jar files into Cloud Storage, but then the pipeline fails:  The only error message available is: ``` S03:e5/ProcessElementAndRestrictionWithSizing+External/FlatMapElements/FlatMap/ParMultiDo(Anonymous)+External/Filter/ParDo(Anonymous)/ParMultiDo(Anonymous)+stats.Count/stats.keyedCountFn+stats.Count/stats.SumPerKey/CombinePerKey/CoGBK+stats.Count/stats.SumPerKey/CombinePerKey/stats.sumIntFn/Partial+stats.Count/stats.SumPerKey/CombinePerKey/CoGBK/Write failed., The job failed because a work item has failed 4 times. Look in previous log entries for the cause of each one of the 4 failures. For more information, see https://cloud.google.com/dataflow/docs/guides/common-errors. The work item was attempted on these workers: go-job-1-1662153285384063-09021416-tqko-harness-x8dv Root cause: The worker lost contact with the service., go-job-1-1662153285384063-09021416-tqko-harness-x8dv Root cause: The worker lost contact with the service., go-job-1-1662153285384063-09021416-tqko-harness-x8dv Root cause: The worker lost contact with the service., go-job-1-1662153285384063-09021416-tqko-harness-x8dv Root cause: The worker lost contact with the service. ``` Here is a full [pipeline log](https://docs.google.com/spreadsheets/d/1OFKBdDiHsz2ZAu5K_DjP4g15Wr2tr3rroyLN3qmts8o/edit?usp=sharing) and [worker logs](https://docs.google.com/spreadsheets/d/1aN8ycCBvs3tJljZ2gN2J0rv8GypQxebIcfM7tygGEeU/edit?usp=sharing) downloaded from Logs explorer. Is this an actual bug or a unsupported workflow? I am trying to follow the Multi language pipelines section of the [Beam Programming Model docs](https://beam.apache.org/documentation/programming-guide/#multi-language-pipelines), regarding expose the Java PTransform (which I assume is correct since calling from Python works) and consuming it from Go, which I'm not sure if I missed any important steps. ### Issue Priority Priority: 2 ### Issue Component Component: sdk-go -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
