Not running Beam job written on Java on Portable Flink runner - apache-beam

Question

When I try to run the simplest PortableRunner pipeline on Java, I get the error:
Exception in thread "main" java.lang.RuntimeException: The Runner experienced the following error during execution:
java.io.IOException: error=2, No such file or directory
at org.apache.beam.runners.portability.JobServicePipelineResult.propagateErrors(JobServicePipelineResult.java:176)
at org.apache.beam.runners.portability.JobServicePipelineResult.waitUntilFinish(JobServicePipelineResult.java:117)
at org.apache.beam.examples.PythonExternal.runWordCount(PythonExternal.java:74)
at org.apache.beam.examples.PythonExternal.main(PythonExternal.java:81)
However, I do not read any files anywhere in the pipeline or I do not sink to anywhere. My arguments are
--runner=PortableRunner --jobEndpoint=localhost:8099
and code
package org.apache.beam.examples;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.coders.StringUtf8Coder;
import org.apache.beam.sdk.options.*;
import org.apache.beam.sdk.schemas.Schema;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.values.Row;
import java.util.Arrays;
import java.util.List;
public class Simplest {
public static final Schema SCHEMA =
Schema.of(
Schema.Field.of("sentence", Schema.FieldType.STRING),
Schema.Field.of("count", Schema.FieldType.INT32));
public interface WordCountOptions extends PipelineOptions {
/** Set this option to specify Python expansion service URL. */
#Description("URL of Python expansion service")
String getExpansionService();
void setExpansionService(String value);
}
static void runWordCount(WordCountOptions options){
final List<String> LINES = Arrays.asList(
"To be, or not to be: that is the question: ",
"Whether 'tis nobler in the mind to suffer ",
"The slings and arrows of outrageous fortune, ",
"Or to take arms against a sea of troubles, ");
Pipeline p = Pipeline.create(options);
p.apply("ReadLines", Create.of(LINES)).setCoder(StringUtf8Coder.of())
.apply(ParDo
.of(new DoFn<String, Row>() {
#ProcessElement
public void processElement(#Element String element, OutputReceiver<Row> out, ProcessContext c) {
// In our DoFn, access the side input.
out.output(Row.withSchema(SCHEMA)
.withFieldValue("sentence", element)
.withFieldValue("count", 1)
.build());
}
}))
.setRowSchema(SCHEMA);
p.run().waitUntilFinish();
}
public static void main(String[] args) {
WordCountOptions options =
PipelineOptionsFactory.fromArgs(args).withValidation().as(WordCountOptions.class);
runWordCount(options);
}
}
Although the manual suggests adding --environment_type=LOOPBACK, I also get error as
Class interface org.apache.beam.examples.PythonExternal$WordCountOptions missing a property named 'environment_type'.
Beam Version: 2.40.0
I started the JobService endpoint docker run --net=host apache/beam_flink1.14_job_server:latest as suggested.
Any suggestions?