[HADOOP-13123] Permit the default hadoop delegation token file format to be configurable

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Matthew Paduano
• Reporter: Matthew Paduano
• Created: 10/May/16 00:18
• Updated: 21/Nov/17 21:06

Description

If one environment updates to using the new dtutil code and accompanying Credentials code, there is a backward compatibility issue with the default file format being JAVA. Older clients need to be updated to ask for a file in the legacy format (FORMAT_JAVA).

As an aid to users in this trap, we can add a configuration property to set the default file format. When set to FORMAT_JAVA, the new server code will serve up legacy files without being asked. The default value for this property will remain FORMAT_PB. But affected users can add this config option to the services using the newer code.

Issue Links

• is related to: HADOOP-15059 3.0 deployment cannot work with old version MR tar ball which breaks rolling upgrade
• relates to: HADOOP-12563 Updated utility to create/modify token files