Sorry. I did not read the mail correctly. I think the error is in how the jar has been created. The classes start with root as wordcount_classes, instead of org.
Thanks Hemanth On Tuesday, February 19, 2013, Hemanth Yamijala wrote: > Have you used the Api setJarByClass in your main program? > > > http://hadoop.apache.org/docs/r1.0.4/api/org/apache/hadoop/mapreduce/Job.html#setJarByClass(java.lang.Class) > > On Tuesday, February 19, 2013, Fatih Haltas wrote: > >> Hi everyone, >> >> I know this is the common mistake to not specify the class adress while >> trying to run a jar, however, >> although I specified, I am still getting the ClassNotFound exception. >> >> What may be the reason for it? I have been struggling for this problem >> more than a 2 days. >> I just wrote different MapReduce application for some anlaysis. I got >> this problem. >> >> To check, is there something wrong with my system, i tried to run >> WordCount example. >> When I just run hadoop-examples wordcount, it is working fine. >> >> But when I add just "package org.myorg;" command at the beginning, it >> doesnot work. >> >> Here is what I have done so far >> ************************************************************************* >> 1. I just copied wordcount code from the apaches own examples source code >> and I just changed package decleration as "package org.myorg;" >> ************************************************************************** >> 2. Then I tried to run that command: >> ************************************************************************* >> "hadoop jar wordcount_19_02.jar org.myorg.WordCount >> /home/hadoop/project/hadoop-data/NetFlow 19_02_wordcount.output" >> ************************************************************************* >> 3. I got following error: >> ************************************************************************** >> [hadoop@ADUAE042-LAP-V project]$ hadoop jar wordcount_19_02.jar >> org.myorg.WordCount /home/hadoop/project/hadoop-data/NetFlow >> 19_02_wordcount.output >> Warning: $HADOOP_HOME is deprecated. >> >> Exception in thread "main" java.lang.ClassNotFoundException: >> org.myorg.WordCount >> at java.net.URLClassLoader$1.run(URLClassLoader.java:217) >> at java.security.AccessController.doPrivileged(Native Method) >> at java.net.URLClassLoader.findClass(URLClassLoader.java:205) >> at java.lang.ClassLoader.loadClass(ClassLoader.java:321) >> at java.lang.ClassLoader.loadClass(ClassLoader.java:266) >> at java.lang.Class.forName0(Native Method) >> at java.lang.Class.forName(Class.java:266) >> at org.apache.hadoop.util.RunJar.main(RunJar.java:149) >> >> ************************************************************************** >> 4. This is the content of my .jar file: >> **************************************************** >> [hadoop@ADUAE042-LAP-V project]$ jar tf wordcount_19_02.jar >> META-INF/ >> META-INF/MANIFEST.MF >> wordcount_classes/ >> wordcount_classes/org/ >> wordcount_classes/org/myorg/ >> wordcount_classes/org/myorg/WordCount.class >> wordcount_classes/org/myorg/WordCount$TokenizerMapper.class >> wordcount_classes/org/myorg/WordCount$IntSumReducer.class >> ********************************************************** >> 5. This is the 'ls' output of my working directory: >> ********************************************************** >> [hadoop@ADUAE042-LAP-V project]$ ls >> flowclasses_18_02 flowclasses_18_02.jar hadoop-1.0.4 >> hadoop-1.0.4.tar.gz hadoop-data MapReduce.java sample >> wordcount_19_02.jar wordcount_classes WordCountClasses WordCount.java >> ************************************************************* >> So as you see, package decleration is fine but I am really helpless, I >> googled but they are all saying samething you should specify the package >> hierarchy of your main class. I did know it already I am specifying but >> doesn't work. >> >> I would be much obliged to anyone helped me >> >> Regards, >> >> >>
