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Date: Fri, 9 Sep 2011 21:28:08 +0000 (UTC)
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Subject: [jira] [Commented] (HADOOP-7328) When a serializer class is
 missing, return null, not throw an NPE.
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    [ https://issues.apache.org/jira/browse/HADOOP-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13101583#comment-13101583 ] 

Hudson commented on HADOOP-7328:
--------------------------------

Integrated in Hadoop-Hdfs-trunk-Commit #939 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/939/])
    HADOOP-7328. When a serializer class is missing, return null, not throw an NPE. Contributed by Harsh J Chouraria.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1167363
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/serializer/SerializationFactory.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/serializer/TestSerializationFactory.java


> When a serializer class is missing, return null, not throw an NPE.
> ------------------------------------------------------------------
>
>                 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, 0.24.0
>
>         Attachments: 0.22-HADOOP-7328.r7.diff, 0.23-HADOOP-7328.r7.diff, HADOOP-7328.r1.diff, HADOOP-7328.r2.diff, HADOOP-7328.r3.diff, HADOOP-7328.r4.diff, HADOOP-7328.r4.diff, HADOOP-7328.r5.diff, HADOOP-7328.r6.diff, HADOOP-7328.r7.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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