If you use "yarn-cluster" for the Spark action's master, the Spark jobs don't show up in the Spark History Server or properly link to it from the Spark AM.
The user needs to set this in their Spark action in the workflow.xml:
It would be nice if Oozie did this automatically via some oozie-site.xml config(s). We could do something similar how the hadoop configs are setup where it will load a Spark .conf file from a directory based on the RM specified in the <job-tracker>.
While we're at it, it might be good to document how to use Spark on YARN:
- Include the spark-assembly jar with your workflow (this is unfortunately not published in maven)
- Specify "yarn-cluster" as the master
Also, the Spark example should delete the output dir in <prepare>