Hi, Thanks for replying.Can you please explain how mapreduce operator works in pig On 5 July 2014 10:35, Darpan R <darpa...@gmail.com> wrote:
> Looks like Classpath problem :java.lang.RuntimeException: > java.lang.ClassNotFoundException: > Class > WordCount$Map not found > > Can you make sure your jar is in the class path ? > > > On 4 July 2014 11:19, Nivetha K <nivethak3...@gmail.com> wrote: > > > Hi, > > > > I am currently working with Pig. I get struck with following script. > > A = load 'sample.txt'; > > B = MAPREDUCE '/home/training/simp.jar' Store A into 'inputDir' Load > > 'outputDir' as (word:chararray, count: int) `WordCount inputDir > outputDir`; > > dump B; > > > > > > Error : > > > > 2014-07-04 11:17:57,811 [main] WARN org.apache.hadoop.mapred.JobClient - > > No job jar file set. User classes may not be found. See JobConf(Class) > or > > JobConf#setJar(String). > > 2014-07-04 11:18:16,313 [main] INFO org.apache.hadoop.mapred.JobClient - > > Task Id : attempt_201407011531_0147_m_000000_2, Status : FAILED > > java.lang.RuntimeException: java.lang.ClassNotFoundException: Class > > WordCount$Map not found > > at > > org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1774) > > at > > > > > org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:191) > > at > org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:631) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:330) > > at org.apache.hadoop.mapred.Child$4.run(Child.java:268) > > at java.security.AccessController.doPrivileged(Native Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at > > > > > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1438) > > at org.apache.hadoop.mapred.Child.main(Child.java:262) > > Caused by: java.lang.ClassNotFoundException: Class WordCount$Map not > found > > at > > > > > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:1680) > > at > > org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1772) > > > > > > > > please help me to solve the problem > > > > > > regards, > > > > Nivetha. > > >
