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From Jeff Eastman <j...@windwardsolutions.com>
Subject Re: Error Running Frequent Itemset Mining Example
Date Wed, 19 May 2010 00:15:30 GMT
Welll, I just brought up a 2 node cluster at 
http://ec2-174-129-148-227.compute-1.amazonaws.com:50030/jobtracker.jsp 
and it ran fine.


On 5/18/10 4:56 PM, Mike Roberts wrote:
> Single instance.  Thx.
>
> On Tue, May 18, 2010 at 4:49 PM, Jeff Eastman<jdog@windwardsolutions.com>wrote:
>
>    
>> Hi Mike,
>>
>> Shouldn't happen. You running this on a single instance or on a hadoop
>> cluster? I will see if I can duplicate.
>>
>> Jeff
>>
>>
>> On 5/18/10 4:27 PM, Mike Roberts wrote:
>>
>>      
>>> Hey Guys,
>>>
>>> Just trying to get the example mentioned here working:
>>> https://cwiki.apache.org/MAHOUT/parallelfrequentpatternmining.html.
>>>
>>> I downloaded the accidents.dat file and placed it in
>>> /home/ubuntu/mahout-in/fpm-input.
>>> I created a directory for the output as /home/ubuntu/mahout-in/fpm-out.
>>> Then, I ran the following command:
>>> ./bin/mahout fpg --input /home/ubuntu/mahout-in/fpm-input --output
>>> /home/ubuntu/mahout-in/fpm-out --method mapreduce
>>>
>>> It runs for a bit and after the first step I get the following error:
>>>
>>> java.io.IOException: java.lang.ClassNotFoundException:
>>> org.apache.mahout.common.Pair
>>>          at
>>>
>>> org.apache.hadoop.io.serializer.JavaSerialization$JavaSerializationDeserializer.deserialize(JavaSerialization.java:55)
>>>          at
>>>
>>> org.apache.hadoop.io.serializer.JavaSerialization$JavaSerializationDeserializer.deserialize(JavaSerialization.java:36)
>>>          at
>>>
>>> org.apache.hadoop.io.DefaultStringifier.fromString(DefaultStringifier.java:75)
>>>          at
>>>
>>> org.apache.mahout.fpm.pfpgrowth.PFPGrowth.deserializeList(PFPGrowth.java:84)
>>>          at
>>>
>>> org.apache.mahout.fpm.pfpgrowth.TransactionSortingMapper.setup(TransactionSortingMapper.java:77)
>>>          at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
>>>          at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
>>>          at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>>>          at
>>> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
>>>
>>>
>>> The step that it was running:
>>> 10/05/18 23:10:18 INFO pfpgrowth.PFPGrowth: No of Features: 30
>>> 10/05/18 23:10:18 INFO jvm.JvmMetrics: Cannot initialize JVM Metrics with
>>> processName=JobTracker, sessionId= - already initialized
>>> 10/05/18 23:10:18 WARN mapred.JobClient: Use GenericOptionsParser for
>>> parsing the arguments. Applications should implement Tool for the same.
>>> 10/05/18 23:10:19 INFO input.FileInputFormat: Total input paths to process
>>> :
>>> 1
>>> 10/05/18 23:10:19 INFO mapred.JobClient: Running job: job_local_0002
>>> 10/05/18 23:10:19 INFO input.FileInputFormat: Total input paths to process
>>> :
>>> 1
>>> 10/05/18 23:10:19 INFO mapred.MapTask: io.sort.mb = 100
>>> 10/05/18 23:10:19 INFO mapred.MapTask: data buffer = 79691776/99614720
>>> 10/05/18 23:10:19 INFO mapred.MapTask: record buffer = 262144/327680
>>> 10/05/18 23:10:19 WARN mapred.LocalJobRunner: job_local_0002
>>>
>>> Anyone know what's going on here, or have a solution?  I verified that the
>>> class file (Pair.Java) exists in
>>> /trunk/core/src/main/java/org/apache/mahout/common.  I did an mvn install
>>> in
>>> core just to be sure.  I'm running Hadoop 20.2 on Ubuntu 10.4 on EC2.
>>>   BTW,
>>> if it's not obvious, I'm a total Mahout n00b.
>>>
>>> Thanks,
>>>
>>> Mike
>>>
>>>
>>>
>>>        
>>
>>      
>    


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