Use a thread-local rather than static ENCODER/DECODER variables in Text for
synchronization
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Key: HADOOP-3863
URL: https://issues.apache.org/jira/browse/HADOOP-3863
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.18.0
Reporter: Arun C Murthy
Assignee: Arun C Murthy
Priority: Critical
Fix For: 0.19.0
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.
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