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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7328) When a serializer class is missing, return null, not throw an NPE.
Date Sat, 03 Sep 2011 18:31:10 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

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

    Attachment: 0.22-HADOOP-7328.r7.diff
                0.23-HADOOP-7328.r7.diff
                HADOOP-7328.r7.diff

Patches with Todd's comments fixed. Patches for 0.22, 0.23, Trunk.

Please review and let me know if further additions are required!

Will also be updating the dependent JIRA patches for trunk, meanwhile, for this new behavior.

> 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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