I don't think that it is a kmeans driver error.
SequenceFileTokenizerMapper is not used in KmeansDriver. I think you are
getting error while transforming data.
On 15-09-2012 12:59, jung hoon sohn wrote:
Hello, I am trying to cluster the input data using KmeansDriver.
The input vector is transformed from the lucene vector using the
"bin/mahout lucene.vector ..." commands and when I run the
KmeansDriver using the run method, I get
12/09/15 15:18:13 INFO mapred.JobClient: Task Id :
attempt_201209121951_0067_m_000000_1, Status : FAILED
java.lang.ClassCastException: org.apache.hadoop.io.LongWritable cannot be
cast to org.apache.hadoop.io.Text
at
org.apache.mahout.vectorizer.document.SequenceFileTokenizerMapper.map(SequenceFileTokenizerMapper.java:37)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
for several attempts but the process goes on and generates the output data.
I can even run the clusterdump using the output cluster data however I am
concerned about the effect of above errors.
Please help me to get through the problem.
Thanks.
Jung Hoon
