[YARN-3273] Improve web UI to facilitate scheduling analysis and debugging

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Rohith Sharma K S
• Reporter: Jian He
• Created: 27/Feb/15 02:03
• Updated: 11/Sep/15 18:29
• Resolved: 18/Mar/15 04:33

Description

Job may be stuck for reasons such as:

• hitting queue capacity
• hitting user-limit,
• hitting AM-resource-percentage

The first queueCapacity is already shown on the UI.
We may surface things like:

• what is user's current usage and user-limit;
• what is the AM resource usage and limit;
• what is the application's current HeadRoom;

Issue Links

• is depended upon by: YARN-3430 RMAppAttempt headroom data is missing in RM Web UI
• relates to: YARN-3284 Expose more ApplicationMetrics and ApplicationAttemptMetrics through YARN command