Trace:
Exception in thread "main" java.lang.ClassNotFoundException:
mapreduce.test.WordCount
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.util.RunJar.main(RunJar.java:148)
Code:
public class WordCount{
public static void main(String[] args) throws Exception {
try {
JobConf conf = new JobConf(WordCount.class);
conf.setJobName("wordcount");
conf.setOutputKeyClass(Text.class);
conf.setOutputValueClass(IntWritable.class);
conf.setMapperClass(Map.class);
conf.setCombinerClass(Reduce.class);
conf.setReducerClass(Reduce.class);
conf.setInputFormat(TextInputFormat.class);
conf.setOutputFormat(TextOutputFormat.class);
FileInputFormat.setInputPaths(conf, new Path("input"));
FileOutputFormat.setOutputPath(conf, new Path("output"));
JobClient.runJob(conf);
}
catch (Exception t) {
// TODO Auto-generated catch block
t.printStackTrace();
System.out.println("Problem");
}
}
}
Thank you!
TimRobertson100 wrote:
>
> Can you post the entire error trace please?
>
> On Fri, May 8, 2009 at 9:40 AM, George Pang <[email protected]> wrote:
>> Dear users,
>> I got "ClassNotFoundException" when run the WordCount example on hadoop
>> using Eclipse. Does anyone know where is the problem?
>>
>> Thank you!
>>
>> George
>>
>
>
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