[YARN-7162] Remove XML excludes file format

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.9.0, 3.0.0-beta1
• Fix Version/s: 2.9.0, 3.0.0-beta1
• Component/s: graceful
• Target Version/s: 2.9.0, 3.0.0-beta1
• Hadoop Flags: Reviewed
• Assignee: Robert Kanter
• Reporter: Robert Kanter
• Created: 05/Sep/17 23:28
• Updated: 25/Oct/19 20:25
• Resolved: 15/Sep/17 16:54

Description

YARN-5536 aims to replace the XML format for the excludes file with a JSON format. However, it looks like we won't have time for that for Hadoop 3 Beta 1. The concern is that if we release it as-is, we'll now have to support the XML format as-is for all of Hadoop 3.x, which we're either planning on removing, or rewriting using a pluggable framework.

This comment in YARN-5536 proposed two quick solutions to prevent this compat issue. In this JIRA, we're going to remove the XML format. If we later want to add it back in, YARN-5536 can add it back, rewriting it to be in the pluggable framework.

Issue Links

• relates to: YARN-5536 Multiple format support (JSON, etc.) for exclude node file in NM graceful decommission with timeout