Hi, You want to upgrade your hadoop to version 2.4.
Peng Zhang On Oct 10, 2014, at 11:01 AM, slee <sle...@gmail.com> wrote: > Hi all: > > When I try to run the 20news-group > example(http://mahout.apache.org/users/classification/twenty-newsgroups.html),I > get the error below: > > > mahout seqdirectory -i $WORK_DIR/20news-all -o $WORK_DIR/20news-seq > MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath. > Error: Could not find or load main class classpath > Running on hadoop, using /home/hadoop/hadoop-0.20.2/bin/hadoop and > HADOOP_CONF_DIR=/home/hadoop/hadoop-0.20.2/conf > MAHOUT-JOB: /home/hadoop/mahout-distribution-0.9/mahout-examples-0.9-job.jar > 14/10/09 19:48:07 INFO common.AbstractJob: Command line arguments: > {--charset=[UTF-8], --chunkSize=[64], > --endPhase=[2147.text.PrefixAdditionFilter], > --input=[/tmp/mahout-work-hadoop/20news-all], --keyPrefix=[], > --method=[mapreduce], --outputtPhase=[0], --tempDir=[temp]} > Exception in thread "main" java.lang.NoClassDefFoundError: > org/apache/hadoop/mapreduce/lib/input/CombineFileInputFormat > at java.lang.ClassLoader.defineClass1(Native Method) > > > > Before I ran the 20news example,I have ran kmeans example, that's ok. > I wonder that if my hadoop version is not compatable with mahout-0.9. > I use hadoop-0.20.2 and mahout-0.9. > > >
