Submit job times under Eclipse error mapred. Jobclient:no job jar file set. User classes May is not found.

Error message:

11/10/14 13:52:07 WARN mapred. Jobclient:use Genericoptionsparser for parsing the arguments. Applications should implement Tool for the same.
11/10/14 13:52:07 WARN mapred.  Jobclient:no job jar file set. User classes May is not found. See jobconf (Class) or Jobconf#setjar (String).
11/10/14 13:52:07 INFO input. Fileinputformat:total input paths to Process:5
11/10/14 13:52:07 INFO mapred. Jobclient:running job:job_201110141041_0014
11/10/14 13:52:08 INFO mapred. Jobclient:map 0% Reduce 0%
11/10/14 13:52:19 INFO mapred. Jobclient:task Id:attempt_201110141041_0014_m_000000_0, status:failed
Java.lang.runtimeexception:java.lang.classnotfoundexception:finger$fingermapper1
At Org.apache.hadoop.conf.Configuration.getClass (configuration.java:809)
At Org.apache.hadoop.mapreduce.JobContext.getMapperClass (jobcontext.java:157)
At Org.apache.hadoop.mapred.MapTask.runNewMapper (maptask.java:569)

At Org.apache.hadoop.mapred.MapTask.run (maptask.java:305)

。。。。

The reason for the error is that the Mapper class and the reduce class are not found.

Single-machine running time is not the problem, but now is submitted to the remote cluster directly run, there will be problems, the reason can refer to this article: http://blog.csdn.net/andyelvis/article/details/7706205

Workaround:

Place the project export jar package under the project root directory and add the following settings before submitting the program

Conf.set ("Mapred.jar", "Loadforecast_utils.jar"); Where Loadforecast_utils.jar is your exported jar file name. Note that the first parameter is not spelled correctly.

Re-run Problem solving!

Submit job times under Eclipse error mapred. Jobclient:no job jar file set. User classes May is not found.