madhukara phatak created HADOOP-8549:
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Summary: Allow other implementation's of java.util.Map in
MapWritable
Key: HADOOP-8549
URL: https://issues.apache.org/jira/browse/HADOOP-8549
Project: Hadoop Common
Issue Type: Improvement
Components: io
Affects Versions: 2.0.0-alpha
Reporter: madhukara phatak
Assignee: madhukara phatak
Priority: Minor
Current implementation of MapWritable uses HashMap as Map implementation. But
in some of the use cases we need other implementations of Map like
LinkedHashMap,SortedMap.This jira changes visibility of 'instance' in
MapWritable from private to protected which allows us to inject custom Map
implementation through sub classing MapWritable .
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