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From "Christian Kunz (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-521) classloader problem for clients
Date Mon, 11 Sep 2006 21:08:22 GMT
classloader problem for clients
-------------------------------

                 Key: HADOOP-521
                 URL: http://issues.apache.org/jira/browse/HADOOP-521
             Project: Hadoop
          Issue Type: Bug
          Components: io
    Affects Versions: 0.6.0
            Reporter: Christian Kunz


HADOOP-419 bit again, after updating with hadoop-0.6.0. Although resolved, there was one instance
left in io.ObjectWritable.java still using Thread.currentThread().getContextClassLoader()
instead of conf.getClassByName()
I got exceptions like:

java.lang.RuntimeException: readObject can't find class
        at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:223)
        at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:59)
        at org.apache.hadoop.ipc.Client$Connection.run(Client.java:256)
Caused by: java.lang.ClassNotFoundException: org/apache/hadoop/io/ObjectWritable$NullInstance
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:242)
        at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:219)
        ... 2 more


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