ClassNotFound exception when attempting to use DataflowRunner

Question

I'm trying to launch a Dataflow job on GCP using Apache Beam 0.6.0. I am compiling an uber jar using the shade plugin because I cannot launch the job using "mvn:execjava". I'm including this dependency:

<dependency>
  <groupId>org.apache.beam</groupId>
  <artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
  <version>0.6.0-SNAPSHOT</version>
</dependency>

I am getting the following exception:

Exception in thread "main" java.lang.IllegalArgumentException: Unknown 'runner' specified 'DataflowRunner', supported pipeline runners [DirectRunner]
    at org.apache.beam.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1609)
    at org.apache.beam.sdk.options.PipelineOptionsFactory.access$400(PipelineOptionsFactory.java:104)
    at org.apache.beam.sdk.options.PipelineOptionsFactory$Builder.as(PipelineOptionsFactory.java:289)
    at com.disney.dtss.desa.tools.SpannerSinkTest.main(SpannerSinkTest.java:116)
Caused by: java.lang.ClassNotFoundException: DataflowRunner
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:264)
    at org.apache.beam.sdk.options.PipelineOptionsFactory.parseObjects(PipelineOptionsFactory.java:1595)

Am I missing something else?

Answer 1

try

mvn compile exec:java -Dexec.mainClass=Yourmain Class -Pdataflow-runner

*add -Pdataflow-runner at the last

Answer 2

Following @Andrew Nguonly's comment I copied the dependency for DataflowRunner to outer scope (to the <dependencies> tag) in the pom.xml file.

Basically added this:

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

Before the closing </dependencies> at pom.xml from the beam wordCount example.