[YARN-8969] AbstractYarnScheduler#getNodeTracker should return generic type to avoid type casting

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.9.1, 3.1.1
• Fix Version/s: 3.0.4, 3.1.2, 3.3.0, 3.2.1, 2.9.3
• Target Version/s: 3.2.0, 3.2.1, 2.9.3
• Assignee: Wanqiang Ji
• Reporter: Wanqiang Ji
• Created: 05/Nov/18 11:48
• Updated: 07/Nov/18 11:20
• Resolved: 06/Nov/18 05:17

Description

Some warning problems like:

Unchecked assignment: 'java.util.List' to 'java.util.List<org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSSchedulerNode>'. Reason: 'scheduler.getNodeTracker()' has raw type, so result of getNodesByResourceName is erased

Issue Links

• is caused by: YARN-4719 Add a helper library to maintain node state and allows common queries