[YARN-1554] add an env variable for the YARN AM classpath

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 2.2.0
• Component/s: nodemanager
• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 02/Jan/14 11:03
• Updated: 21/Aug/14 20:18
• Resolved: 10/Apr/14 10:25

Description

Currently YARN apps set up their classpath via the default value YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH or an overridden property yarn.application.classpath.

If you don't have the classpath right, the AM won't start up. This means the client needs to be explicitly configured with the CP.

If the node manager exported the classpath property via an env variable YARN_APPLICATION_CLASSPATH, then the classpath could be set up in the AM simply by referencing that property, rather than hoping its setting is in sync.

Issue Links

• duplicates: YARN-973 yarn.application.classpath requires client to know service internals