Dror Mizrachi created MAHOUT-1071:
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Summary: Mahout-0.7 is not running on Hadoop 0.23 CDH4-MR1
Key: MAHOUT-1071
URL: https://issues.apache.org/jira/browse/MAHOUT-1071
Project: Mahout
Issue Type: Bug
Environment: Hadoop-0.23 CDH4-MR1
Reporter: Dror Mizrachi
Priority: Critical
Hi
I'm using Mahout-0.7-job.jar on Hadoop-0.23(CDH4-MR1). I got the below
exception.
Note: org.apache.hadoop.mapreduce.JobContext is an Interface on 0.23 while it
was class on 0.20.x
It seems that Mahout-0.7 is still incompatible with Hadoop-0.23 related to this
class/interface and maybe for other classes that have been changed in 0.23 vs.
0.20.x
Please advice / fix is ASAP.
Thanks in advance :-)
Dror
-------------------
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
interface org.apache.hadoop.mapreduce.JobContext, but class was expected
at
org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:166)
at org.apache.mahout.common.AbstractJob.prepareJob(AbstractJob.java:579)
at
org.apache.mahout.cf.taste.hadoop.preparation.PreparePreferenceMatrixJob.run(PreparePreferenceMatrixJob.java:75)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.run(RecommenderJob.java:154)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
com.intel.cooccurence.BuildCoOccurenceMatrixJob.runRecommendationJob(BuildCoOccurenceMatrixJob.java:54)
at
com.intel.cooccurence.BuildCoOccurenceMatrixJob.run(BuildCoOccurenceMatrixJob.java:31)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
com.intel.algoritms.RecommendationAlgorithms.runAlgorithm(RecommendationAlgorithms.java:44)
at
com.intel.engines.RecommendationEngine.run(RecommendationEngine.java:39)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
com.intel.engines.RecommendationEngine.main(RecommendationEngine.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:208)
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