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Posted to common-issues@hadoop.apache.org by "Akira AJISAKA (JIRA)" <ji...@apache.org> on 2015/05/06 19:15:00 UTC
[jira] [Assigned] (HADOOP-6842) "hadoop fs -text" does not give a
useful text representation of MapWritable objects
[ https://issues.apache.org/jira/browse/HADOOP-6842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Akira AJISAKA reassigned HADOOP-6842:
-------------------------------------
Assignee: Akira AJISAKA
> "hadoop fs -text" does not give a useful text representation of MapWritable objects
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-6842
> URL: https://issues.apache.org/jira/browse/HADOOP-6842
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 0.20.0
> Reporter: Steven Wong
> Assignee: Akira AJISAKA
> Labels: BB2015-05-TBR
> Attachments: HADOOP-6842.patch
>
>
> If a sequence file contains MapWritable objects, running "hadoop fs -text" on the file prints the following for each MapWritable:
> org.apache.hadoop.io.MapWritable@4f8235ed
> To be more useful, it should print out the contents of the map instead. This can be done by adding a toString method to MapWritable, i.e. something like:
> public String toString() {
> return (new TreeMap<Writable, Writable>(instance)).toString();
> }
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