Getting ClassNotFound Exception: While dumping Configuration in Hadoop - hadoop

Question

I'm trying a simple program from the "hadoop in Action" book to merge a series of files from the local file system into one file in the hdfs. The code snippet is the same as the one provided in the book.
import java.lang.*;
import java.util.*;
import java.io.*;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
public class PutMerge {
public static void main(String[] args) throws IOException{
Configuration conf = new Configuration();
FileSystem hdfs = FileSystem.get(conf);
FileSystem local = FileSystem.getLocal(conf);
Path inputDir = new Path(args[0]); // First argument has the input directory
Path hdfsFile = new Path(args[1]); // Concatenated hdfs file name
try {
FileStatus[] inputFiles = local.listStatus(inputDir); // list of Local Files
FSDataOutputStream out = hdfs.create(hdfsFile); // target file creation
for (int i = 0; i<inputFiles.size; i++ {
FSDataInputStream in = local.open(inputFiles[i].getPath());
int bytesRead = 0;
byte[] buff = new byte[256];
while (bytesRead = (in.read(buff))>0) {
out.write(buff,0,bytesRead);
}
in.close();
}
out.close();
}
catch(Exception e) {
e.printStackTrace();
}
}
}
The program successfully compiled and while trying to run I'm getting the following exception
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/commons/configuration/Configuration
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.(DefaultMetricsSystem.java:37)
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.(DefaultMetricsSystem.java:34)
at org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:217)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237)
at org.apache.hadoop.security.KerberosName.(KerberosName.java:79)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:210)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:185)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:237)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:482)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:468)
at org.apache.hadoop.fs.FileSystem$Cache$Key.(FileSystem.java:1519)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1420)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:123)
at PutMerge.main(PutMerge.java:16) Caused by: java.lang.ClassNotFoundException:
org.apache.commons.configuration.Configuration
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 17 more
Based on inputs from some of the posts, I added the commons package. My classpath definition is
/usr/java/jdk1.7.0_21:/data/commons-logging-1.1.2/commons-logging-1.1.2.jar:/data/hadoop-1.1.2/hadoop-core-1.1.2.jar:/data/commons-logging-1.1.2/commons-logging-adapters-1.1.2.jar:/data/commons-logging-1.1.2/commons-logging-api-1.1.2.jar:.
Any clue on why this is not working?

Answer 1

You didnt include apache configuration in your classpath.
Really though you shouldn't need to include much besides hadoop itself. Make sure you are running your jar with hadoop itself.
> hadoop -jar myJar.jar