Hi ,
I am trying to run a job which does not require reducer, I commented out the
reducer configuration from the job, but now its throwing following error
java.lang.ClassCastException: class java.nio.ByteBuffer
at java.lang.Class.asSubclass(Unknown Source)
at
org.apache.hadoop.mapred.JobConf.getOutputKeyComparator(JobConf.java:599)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.<init>(MapTask.java:791)
at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:524)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:613)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
11/03/11 11:19:12 INFO mapred.JobClient: map 0% reduce 0%
Is it possible to run a job only with mapper??
Regards
Sagar
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