Hello
I'm studying Hadoop these days. When I finished install hadoop under Fedora 19,
I try to run wordcount but I can't.
The error in userlogs as follow:(/logs/userlogs/attemp.../syslog)
2015-12-10 19:42:52,276 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
Initializing JVM Metrics with processName=MAP, sessionId=
2015-12-10 19:42:52,427 WARN org.apache.hadoop.mapred.TaskTracker: Error
running child
java.lang.ClassCastException: org.apache.hadoop.mapreduce.lib.input.FileSplit
cannot be cast to org.apache.hadoop.mapred.InputSplit
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:323)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
2015-12-10 19:42:52,432 INFO org.apache.hadoop.mapred.TaskRunner: Runnning
cleanup for the task
I think the problem is the mapred and mapreduce cannot be matched.(Is it right?)
I tried to find out the solution on the Internet. But all I find are telling
about the difference between the mapred and mapreduce, but I still don't know
how to fix the program.
Hope I can get the answer.
Thank you very very much.
Yours,
Zhou
Sorry,I forgot to say my hadoop version is hadoop-0.20.2 . Should I try to
install version hadoop-1.x or higher?
