Hi
I have one windows machine and one linux machine
my eclipse is on winowds machine
and hadoop running on single linux machine
I am trying to run wordcount program from eclipse(on windows machine) to
Hadoop(on linux machine)
I getting following error

 3/01/31 11:48:14 WARN mapred.JobClient: Use GenericOptionsParser for
parsing the arguments. Applications should implement Tool for the same.
13/01/31 11:48:15 WARN mapred.JobClient: No job jar file set.  User classes
may not be found. See JobConf(Class) or JobConf#setJar(String).
13/01/31 11:48:16 INFO input.FileInputFormat: Total input paths to process
: 1
13/01/31 11:48:16 WARN util.NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
13/01/31 11:48:16 WARN snappy.LoadSnappy: Snappy native library not loaded
13/01/31 11:48:26 INFO mapred.JobClient: Running job: job_201301300613_0029
13/01/31 11:48:27 INFO mapred.JobClient:  map 0% reduce 0%
13/01/31 11:48:40 INFO mapred.JobClient: Task Id :
attempt_201301300613_0029_m_000000_0, Status : FAILED
java.lang.RuntimeException: java.lang.ClassNotFoundException:
WordCount$MapClass
 at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:867)
 at
org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:199)
 at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:719)
 at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
 at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
 at java.security.AccessController.doPrivileged(Native Method)
 at javax.security.auth.Subject.doAs(Subject.java:396)
 at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
 at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.ClassNotFoundException: WordCount$MapClass
 at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java:247)
 at
org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:820)
 at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:865)
 ... 8 more
Also I want to know how to debug Hadoop Program using eclipse.
Thank You.

Hello vikas,
Exception nowhere it says failed to connect remote machine or hdfs, and you
can run from windows or linux that s not an issue..please check your code
once again or post your code!.
If you still doubt connecting remote machine..Make a jar out of your
wordcount and give a chance in linux!
Regards,
Ramesh Byndoor
On Jan 31, 2013 11:57 AM, "Vikas Jadhav" <[EMAIL PROTECTED]> wrote:

> Hi
> I have one windows machine and one linux machine
> my eclipse is on winowds machine
> and hadoop running on single linux machine
> I am trying to run wordcount program from eclipse(on windows machine) to
> Hadoop(on linux machine)
>  I getting following error
>
>  3/01/31 11:48:14 WARN mapred.JobClient: Use GenericOptionsParser for
> parsing the arguments. Applications should implement Tool for the same.
> 13/01/31 11:48:15 WARN mapred.JobClient: No job jar file set.  User
> classes may not be found. See JobConf(Class) or JobConf#setJar(String).
> 13/01/31 11:48:16 INFO input.FileInputFormat: Total input paths to process
> : 1
> 13/01/31 11:48:16 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> 13/01/31 11:48:16 WARN snappy.LoadSnappy: Snappy native library not loaded
> 13/01/31 11:48:26 INFO mapred.JobClient: Running job: job_201301300613_0029
> 13/01/31 11:48:27 INFO mapred.JobClient:  map 0% reduce 0%
> 13/01/31 11:48:40 INFO mapred.JobClient: Task Id :
> attempt_201301300613_0029_m_000000_0, Status : FAILED
> java.lang.RuntimeException: java.lang.ClassNotFoundException:
> WordCount$MapClass
>  at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:867)
>  at
> org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:199)
>  at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:719)
>  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
>  at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at javax.security.auth.Subject.doAs(Subject.java:396)
>  at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
>  at org.apache.hadoop.mapred.Child.main(Child.java:249)
> Caused by: java.lang.ClassNotFoundException: WordCount$MapClass
>  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
>  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
>  at java.lang.Class.forName0(Native Method)
>  at java.lang.Class.forName(Class.java:247)
>  at
> org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:820)
>  at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:865)
>  ... 8 more
>
>
>
>
> Also I want to know how to debug Hadoop Program using eclipse.
>
>
>
>
> Thank You.
>
>