[YARN-8878] Remove StringBuffer from ManagedParentQueue.java

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 3.2.0
• Fix Version/s: 3.3.0
• Component/s: resourcemanager
• Hadoop Flags: Reviewed
• Flags: Patch
• Assignee: David Mollitor
• Reporter: David Mollitor
• Created: 15/Oct/18 21:25
• Updated: 28/Dec/18 11:49
• Resolved: 28/Dec/18 08:30

Description

Remove all StringBuffer references from the class ManagedParentQueue. StringBuffer are synchronized and should be instead replaced with the non-synchronized StringBuilder. However, in this case, just use SLF4J parameter logging.