Roman Shaposhnik created MAHOUT-1016:
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Summary: running clusterControlDataWithMeanShift against Hadoop
2.0.0 RC resulted in ClassCastException
Key: MAHOUT-1016
URL: https://issues.apache.org/jira/browse/MAHOUT-1016
Project: Mahout
Issue Type: Bug
Components: Examples
Affects Versions: 0.7
Reporter: Roman Shaposhnik
{noformat}
$ mahout org.apache.mahout.clustering.syntheticcontrol.meanshift.Job
.....
12/05/17 13:07:06 INFO mapreduce.Job: Task Id :
attempt_1337269859451_0048_m_000000_0, Status : FAILED
Error: java.lang.ClassCastException:
org.apache.mahout.clustering.meanshift.MeanShiftCanopy cannot be cast to
org.apache.mahout.clustering.iterator.ClusterWritable
at
org.apache.mahout.clustering.meanshift.MeanShiftCanopyMapper.map(MeanShiftCanopyMapper.java:31)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:725)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:332)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:152)
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:1232)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:147)
{noformat}
Here's a failed Bigtop test report for more details (make sure to scroll to
where the shell trace is given):
http://bigtop01.cloudera.org:8080/view/Test/job/SmokeCluster/lastCompletedBuild/testReport/org.apache.bigtop.itest.mahout.smoke/TestMahoutExamples/clusterControlDataWithMeanShift/
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