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From "Chad Whipkey (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3454) Text.find incorrectly searches beyond the end of the buffer
Date Fri, 30 May 2008 17:08:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chad Whipkey updated HADOOP-3454:
---------------------------------

    Attachment:     (was: patch_haddop_3454.patch)

> Text.find incorrectly searches beyond the end of the buffer
> -----------------------------------------------------------
>
>                 Key: HADOOP-3454
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3454
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.17.0
>            Reporter: Chad Whipkey
>         Attachments: HADOOP-3454.patch
>
>
> Text.find() does not pay attention to the length field.  So, this code:
> {code}
>     public void testTextFind()
>     {
>         Text t = new Text("FIND AN I");
>         t.set(new byte[] { (byte) 'F' });
>         assert t.getLength() == 1 : "Length should be 1";
>         assert t.find( "F") == 0 : "Found F at " + t.find("F");
>         assert t.find( "I") == -1 : "Found I at " + t.find("I");
>     }
> {code}
> incorrectly throws an assertion because it finds the I at position 1, even though the
Text is only one byte long.
> I think to fix this it is enough to change this line in Text.find:
> ByteBuffer src = ByteBuffer.wrap(this.bytes);
> to 
> ByteBuffer src = ByteBuffer.wrap(this.bytes,0,this.length);

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