[HADOOP-3863] Use a thread-local rather than static ENCODER/DECODER variables in Text for synchronization

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.19.0
• Hadoop Flags: Reviewed
• Assignee: Arun Murthy
• Reporter: Arun Murthy
• Created: 30/Jul/08 17:59
• Updated: 08/Jul/09 16:52
• Resolved: 30/Jul/08 22:59

Description

Text.

{ENCODER|DECODER}

are static variables which need to be synchronized in Text.

{read|write}String; given that lots of RPC code calls Text.{read|write}

String the contention for this lock shows up very significantly on large clusters.