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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2015/11/15 14:26:11 UTC

[jira] [Commented] (HADOOP-8549) Allow other implementation's of java.util.Map in MapWritable

    [ https://issues.apache.org/jira/browse/HADOOP-8549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005889#comment-15005889 ] 

Steve Loughran commented on HADOOP-8549:
----------------------------------------

Is this still an issue, or can we close it as wontfix/cannot reproduce?

> 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
>         Attachments: HADOOP-8549.patch
>
>
> 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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