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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2011/09/03 20:33:09 UTC

[jira] [Commented] (HADOOP-7328) When a serializer class is missing, return null, not throw an NPE.

    [ https://issues.apache.org/jira/browse/HADOOP-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096739#comment-13096739 ] 

Hadoop QA commented on HADOOP-7328:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12492921/0.22-HADOOP-7328.r7.diff
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 2 new or modified tests.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/132//console

This message is automatically generated.

> 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
>
>         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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