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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1993) Word count example doesn't output the words correctly to cassandra. It outputs spurious data past the length of the byte array.
Date Sun, 16 Jan 2011 04:04:46 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-1993:
--------------------------------------

           Component/s:     (was: Hadoop)
                        Contrib
         Fix Version/s: 0.7.1
              Assignee: Jonathan Ellis
    Remaining Estimate: 1h  (was: 0.08h)
     Original Estimate: 1h  (was: 0.08h)

> Word count example doesn't output the words correctly to cassandra.  It outputs spurious
data past the length of the byte array.
> --------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-1993
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1993
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Contrib
>    Affects Versions: 0.7.0
>         Environment: All
>            Reporter: Jesse Shieh
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 0.7.1
>
>         Attachments: 1993-v2.txt, trunk-1993.txt
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> To reproduce:
> # start a local cassandra server e.g. sudo bin/cassandra -f
> cd contrib/word_count
> ant
> bin/word_count_setup
> bin/word_count
> # check the data in cassandra, all looks fine because the words are all of the same length.
> # change the data in cassandra to real words, rerun the mapreduce and you'll see some
words have spurious characters written past their length
> # this is because the word bytes are not terminated at their length

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