[YARN-3010] Fix recent findbug issue in AbstractYarnScheduler

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Yi Liu
• Reporter: Yi Liu
• Created: 06/Jan/15 07:43
• Updated: 10/Apr/15 20:10
• Resolved: 07/Jan/15 22:13

Description

A new findbug issues reported recently in latest trunk:

IS Inconsistent synchronization of org.apache.hadoop.yarn.server.resourcemanager.scheduler.AbstractYarnScheduler.rmContext; locked 91% of time

https://issues.apache.org/jira/browse/YARN-2996?focusedCommentId=14265760&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14265760

https://builds.apache.org/job/PreCommit-YARN-Build/6249//artifact/patchprocess/newPatchFindbugsWarningshadoop-yarn-server-resourcemanager.html