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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3093) ma/reduce throws the following exception if "io.serializations" is not set:
Date Wed, 26 Mar 2008 14:49:30 GMT
ma/reduce throws the following exception if "io.serializations" is not set:
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                 Key: HADOOP-3093
                 URL: https://issues.apache.org/jira/browse/HADOOP-3093
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
            Reporter: Runping Qi




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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