Hi Rohit,
I really learned alot from this link:
http://www.infosci.cornell.edu/hadoop/windows.html
Maha
Quoting Rohit Mishra <[email protected]>:
I need clarification on how to run a Hadoop program. I am getting a
ClassNotFoundException error when I try to run the test example given in the
book [Ch 2].
Do we need to first compile the Java files into class files or will the
hadoop command do so automatically? How can we setup the HADOOP_CLASSPATH
variable. The book says "build/classes" Will the build directory be inside
the hadoop directory or under src?
I have placed the source .java files in /hadoop/me/rohitmishra/ch2
I have placed the input files for hadoop MaxTemperature
input/ncdc/sample.txt output directories inside /hadoop/input
When I run the command I get the following error:
ro...@renaissance1:~/hadoop-0.20.2$ hadoop MaxTemperature
input/ncdc/sample.txt output
Exception in thread "main" java.lang.NoClassDefFoundError: MaxTemperature
Caused by: java.lang.ClassNotFoundException: MaxTemperature
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: MaxTemperature. Program will exit.
Regards,
Rohit Mishra
VIT University
Blog: http://www.rohitmishra.me/blog
Twitter: http://twitter.com/movingahead
Facebook: http://www.facebook.com/rohitmishra
Thank you,
Maha Alabduljalil
[email protected]
