[OOZIE-1063] Provide documentation on configuring Oozie to use new Hadoop API

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: docs
• Assignee: Unassigned
• Reporter: Michael Katzenellenbogen
• Created: 13/Nov/12 21:34
• Updated: 11/Aug/16 16:19

Description

To use the newer mapreduce.* Hadoop API, the Oozie workflow XML configuration should have the mapred.mapper|reducer.new-api property set to true. This is currently undocumented (on the Oozie side), and throws mysterious RuntimeExceptions when using the newer API.

Example RuntimeExceptions:

java.lang.RuntimeException: class com.foo.bar.SomeMapper not org.apache.hadoop.mapred.Mapper

java.lang.RuntimeException: class com.foo.bar.SomeOutputFormat not org.apache.hadoop.mapred.OutputFormat

Issue Links

• is duplicated by: OOZIE-1390 documentation: how to run mapreduce (workflow or proxy submission) using mapreduce API