Hi,today i run the example of "org.apache.mahout.cf.taste.hadoop.SlopeOnePrefsToDiffsJob" in TasteCommandLine.html
r...@master:/home/zhoufeng/newdisk/hadoop-0.19.2# bin/hadoop jar /home/zhoufeng/newdisk/result/trunk/core/target/mahout-core-0.3-SNAPSHOT.job org.apache.mahout.cf.taste.hadoop.SlopeOnePrefsToDiffsJob -i r.txt -o output java.lang.NoSuchMethodError: org.apache.hadoop.mapred.JobConf.setBooleanIfUnset(Ljava/lang/String;Z)V at org.apache.hadoop.mapreduce.Job.setUseNewAPI(Job.java:388) at org.apache.hadoop.mapreduce.Job.submit(Job.java:431) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:447) at org.apache.mahout.cf.taste.hadoop.SlopeOnePrefsToDiffsJob.main(SlopeOnePrefsToDiffsJob.java:86) 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:165) at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68) then i browsed the javadoc of hadoop0.18.3,hadoop0.19.2,hadoop0.20.1,but i can not find out org.apache.hadoop.mapred.JobConf.setBooleanIfUnset. How could i solve this problem? thanks
