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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3093) ma/reduce throws the following exception if "io.serializations" is not set:
Date Fri, 28 Mar 2008 10:10:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582968#action_12582968
] 

Tom White commented on HADOOP-3093:
-----------------------------------

+1

> ma/reduce throws the following exception if "io.serializations" is not set:
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-3093
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3093
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Runping Qi
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.17.0
>
>         Attachments: patch-3093.txt
>
>
> map/reduce throws the following exception if "io.serializations" is not set:
> java.lang.NullPointerException
>         at org.apache.hadoop.io.serializer.SerializationFactory.<init>(SerializationFactory.java:52)
>         at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:325)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:177)
>         at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2073)
> Map/reduce should use org.apache.hadoop.io.serializer.WritableSerialization as the default
class as it had in the past.

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