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From "Cameron Pope (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-120) Reading an ArrayWriter does not work because valueClass does not get initialized
Date Fri, 07 Sep 2007 19:43:31 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cameron Pope updated HADOOP-120:
--------------------------------

    Attachment: hadoop-120-workaround.patch

Patch to document ArrayWritable and throw a specific exception when readFields is undefine.

> Reading an ArrayWriter does not work because valueClass does not get initialized
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-120
>                 URL: https://issues.apache.org/jira/browse/HADOOP-120
>             Project: Hadoop
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.15.0
>         Environment: Red Hat  
>            Reporter: Dick King
>            Assignee: Owen O'Malley
>         Attachments: hadoop-120-fix.patch, hadoop-120-workaround.patch
>
>
> If you have a Reducer whose value type is an ArrayWriter it gets enstreamed alright but
at reconstruction type when ArrayWriter::readFields(DataInput in) runs on a DataInput that
has a nonempty ArrayWriter , newInstance fails trying to instantiate the null class.

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