Apache Beam: Cannot find DataflowRunner

Question

I am trying to run a pipeline, which I was able to run successfully with DirectRunner, on Google Cloud Dataflow. When I execute this Maven command:

mvn compile exec:java \
    -Dexec.mainClass=com.example.Pipeline \
    -Dexec.args="--project=project-name \
    --stagingLocation=gs://bucket-name/staging/ \
    ... custom arguments ...
    --runner=DataflowRunner"

I get the following error:

No Runner was specified and the DirectRunner was not found on the classpath.
[ERROR] Specify a runner by either:
[ERROR]     Explicitly specifying a runner by providing the 'runner' property
[ERROR]     Adding the DirectRunner to the classpath
[ERROR]     Calling 'PipelineOptions.setRunner(PipelineRunner)' directly

I intentionally removed DirectRunner from my pom.xml and added this:

<dependency>
    <groupId>org.apache.beam</groupId>
    <artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
    <version>2.0.0</version>
    <scope>runtime</scope>
</dependency>

I went ahead and removed the <scope> tag, then called options.setRunner(DataflowRunner.class), but it didn't help. Extending my own PipelineOptions interface from DataflowPipelineOptions did not solve the problem as well.

Looks like it ignores runner option in a way I am not able to debug.

Update: Here is the full pom.xml, in case that helps:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>dataflow</artifactId>
    <version>0.1</version>

    <dependencies>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-sdks-java-core</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
            <version>2.0.0</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-sdks-java-io-jdbc</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.beam</groupId>
            <artifactId>beam-sdks-java-io-google-cloud-platform</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>42.1.4.jre7</version>
        </dependency>
    </dependencies>
</project>

Answer 1

Forgetting to pass my PipelineOptions instance as a parameter to Pipeline.create() method was the cause of my problem.

PipelineOptionsFactory.register(MyOptions.class);
MyOptions options = PipelineOptionsFactory.fromArgs(args).withValidation().as(MyOptions.class);
Pipeline pipeline = Pipeline.create(options); // Don't forget the options argument.
...
pipeline.run();