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Posted to common-dev@hadoop.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2010/04/28 04:40:33 UTC

[jira] Created: (HADOOP-6729) serializer.JavaSerialization should be added to io.serializations by default

serializer.JavaSerialization should be added to io.serializations by default
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                 Key: HADOOP-6729
                 URL: https://issues.apache.org/jira/browse/HADOOP-6729
             Project: Hadoop Common
          Issue Type: Improvement
          Components: conf
    Affects Versions: 0.20.2
            Reporter: Ted Yu


org.apache.hadoop.io.serializer.JavaSerialization isn't included in io.serializations by default.

When a class which implements the Serializable interface is used, user would see the following without serializer.JavaSerialization:

java.lang.NullPointerException
   at
org.apache.hadoop.io.serializer.SerializationFactory.getSerializer(SerializationFactory.java:73)
   at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:759)
   at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:487)
   at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:575)
   at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
   at org.apache.hadoop.mapred.Child.main(Child.java:170)

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