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Date: Sat, 11 Jun 2011 22:19:58 +0000 (UTC)
From: "Harsh J (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Updated] (HADOOP-7328) Give more information about a
 missing Serializer class
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     [ https://issues.apache.org/jira/browse/HADOOP-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harsh J updated HADOOP-7328:
----------------------------

    Release Note:   (was: Improve SerializationFactory's handling of cases where a serializer isn't found given a class.)
          Status: Patch Available  (was: Open)

Please review patch at https://reviews.apache.org/r/884/

> Give more information about a missing Serializer class
> ------------------------------------------------------
>
>                 Key: HADOOP-7328
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7328
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 0.20.2
>            Reporter: Harsh J
>            Assignee: Harsh J
>              Labels: io, serialization
>             Fix For: 0.23.0
>
>         Attachments: HADOOP-7328.r1.diff
>
>
> When you have a key/value class that's non Writable and you forget to attach io.serializers for the same, an NPE is thrown by the tasks with no information on why or what's missing and what led to it. I think a better exception can be thrown by SerializationFactory instead of an NPE when a class is not found accepted by any of the loaded ones.

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