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From tigertail <tyc...@yahoo.com>
Subject Re: ClassNotFoundException with pseudo/distributed run of KMeans
Date Thu, 30 Jul 2009 20:10:20 GMT

Hi Paul,

Sorry for the naive question, can you show me how to "flatten the JOB with
all classes in the same JAR"? And has this error been fixed in the new SVN
version?


Paul Ingles-4 wrote:
> 
> I've flattened the JOB with all classes in the same JAR and that works  
> successfully.
> 
> Steps:
> 
> 1) svn co http://svn.apache.org/repos/asf/lucene/mahout/trunk mahout- 
> trunk
> 2) cd mahout-trunk
> 3) mvn install
> 4) hadoop jar examples/target/mahout-examples-0.2-SNAPSHOT.job  
> org.apache.mahout.clustering.syntheticcontrol.kmeans.Job -libjars  
> examples/target/dependency/gson-1.3.jar
> 
> As for setting up Hadoop in pseudo-distributed, that was done  
> following the guide on the site but I'll check that again if it's been  
> updated recently.
> 
> Thanks again for all the help,
> Paul
> 
> On 17 Jul 2009, at 13:39, Grant Ingersoll wrote:
> 
>> Have you tried flattening the JOB so all the classes are packed in a  
>> single JAR?  Also, can you give the full list of steps you are  
>> doing, because I am able to run this in pseudo-distro without  
>> getting this error.  Also, have you checked the Hadoop logs ($HADOOP/ 
>> logs, I believe)
>>
>> I also notice that the Hadoop quick start has different  
>> configuration settings now due to 0.20
>>
>> -Grant
>>
>> On Jul 17, 2009, at 5:00 AM, Paul Ingles wrote:
>>
>>> I've tried re-running specifically adding the gson jar as follows:
>>>
>>> $ hadoop jar examples/target/mahout-examples-0.2-SNAPSHOT.job  
>>> org.apache.mahout.clustering.syntheticcontrol.kmeans.Job -libjars  
>>> examples/target/dependency/gson-1.3.jar
>>>
>>> Unfortunately, I get the same errors as before:
>>>
>>> 09/07/17 09:53:50 INFO kmeans.KMeansDriver: Clustering
>>> 09/07/17 09:53:50 INFO kmeans.KMeansDriver: Running Clustering
>>> 09/07/17 09:53:50 INFO kmeans.KMeansDriver: Input: output/data  
>>> Clusters In: output/clusters-4 Out: output/points Distance:  
>>> org.apache.mahout.utils.EuclideanDistanceMeasure
>>> 09/07/17 09:53:50 INFO kmeans.KMeansDriver: convergence: 0.5 Input  
>>> Vectors: org.apache.mahout.matrix.SparseVector
>>> 09/07/17 09:53:50 WARN mapred.JobClient: Use GenericOptionsParser  
>>> for parsing the arguments. Applications should implement Tool for  
>>> the same.
>>> 09/07/17 09:53:50 INFO mapred.FileInputFormat: Total input paths to  
>>> process : 2
>>> 09/07/17 09:53:51 INFO mapred.JobClient: Running job:  
>>> job_200907161209_0018
>>> 09/07/17 09:53:52 INFO mapred.JobClient:  map 0% reduce 0%
>>> 09/07/17 09:54:06 INFO mapred.JobClient: Task Id :  
>>> attempt_200907161209_0018_m_000000_0, Status : FAILED
>>> java.lang.NoClassDefFoundError: com/google/gson/reflect/TypeToken
>>> 	at java.lang.ClassLoader.defineClass1(Native Method)
>>> 	at java.lang.ClassLoader.defineClass(ClassLoader.java:703)
>>> 	at  
>>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java: 
>>> 124)
>>> 	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
>>> 	at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
>>> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>>> 	at java.security.AccessController.doPrivileged(Native Method)
>>> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>>> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
>>> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
>>> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:254)
>>> 	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:402)
>>> 	at  
>>> org 
>>> .apache 
>>> .mahout.matrix.AbstractVector.asFormatString(AbstractVector.java:374)
>>> 	at  
>>> org 
>>> .apache 
>>> .mahout 
>>> .clustering.kmeans.Cluster.outputPointWithClusterInfo(Cluster.java: 
>>> 198)
>>> 	at  
>>> org 
>>> .apache 
>>> .mahout 
>>> .clustering.kmeans.KMeansClusterMapper.map(KMeansClusterMapper.java: 
>>> 39)
>>> 	at  
>>> org 
>>> .apache 
>>> .mahout 
>>> .clustering.kmeans.KMeansClusterMapper.map(KMeansClusterMapper.java: 
>>> 32)
>>> 	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
>>> 	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:356)
>>> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>>> 	at org.apache.hadoop.mapred.Child.main(Child.java:170)
>>> Caused by: java.lang.ClassNotFoundException:  
>>> com.google.gson.reflect.TypeToken
>>> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>>> 	at java.security.AccessController.doPrivileged(Native Method)
>>> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>>> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
>>> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
>>> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:254)
>>> 	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:402)
>>> 	... 20 more
>>>
>>> This is running pseudo-distributed on my laptop.
>>>
>>> On 16 Jul 2009, at 18:57, Adil Aijaz wrote:
>>>
>>>> My basic understanding of the class loader stuff is:
>>>>
>>>> 1. Any jars that need to be available to map/reduce jobs should be  
>>>> specified through -libjars  (e.g hadoop --config ... -libjars  
>>>> gson.jar jar <path to my jar> ...)
>>>> 2. Any jars that need to be available to the main class should be  
>>>> specified through lib/*.jar (that is in the mahout-examples-0.2- 
>>>> SNAPSHOT/lib/*.jar)
>>>>
>>>> unless of course as Jeff is saying one ends up flattening the lib/ 
>>>> *.jar into top level classes.
>>>>
>>>> Adil
>>>>
>>>> Jeff Eastman wrote:
>>>>> Isn't this the same old problem that our Job jar file has a lib  
>>>>> directory with the Mahout code in it and the way Hadoop loads the  
>>>>> jar it sometimes cannot resolve classes in it? IIRC, one needs to  
>>>>> smash the job jar file into a single jar in order for Dirichlet  
>>>>> (at least, and any other examples which contain non-core  
>>>>> classes). I confess I do not understand the class loader stuff  
>>>>> enough to be more specific.
>>>>>
>>>>> I have duplicated the CNF exception by defining and using a user- 
>>>>> defined distance measure in the Job file and running KMeans with  
>>>>> it, so it is not specific to Dirichlet.
>>>>>
>>>>>
>>>>> classes
>>>>> Grant Ingersoll wrote:
>>>>>> Hmm, I'm not seeing the ClassNotFound problem but am getting  
>>>>>> fetch failures.  Will look later.
>>>>>>
>>>>>> -Grant
>>>>>>
>>>>>> On Jul 16, 2009, at 11:32 AM, Paul Ingles wrote:
>>>>>>
>>>>>>> I've just tried setting a brand new machine (Ubuntu 8.04  
>>>>>>> Virtual Machine) with Hadoop 0.20.0 and running the compile 

>>>>>>> jobs against it. I get the same problems as before... still 

>>>>>>> scratching my head :(
>>>>>>>
>>>>>>> On 16 Jul 2009, at 12:15, Paul Ingles wrote:
>>>>>>>
>>>>>>>> Sure,
>>>>>>>>
>>>>>>>> I'm running (currently) on my MacBook Air, running OSX Leopard.
>>>>>>>>
>>>>>>>> JDK: java version "1.6.0_13"
>>>>>>>> Java(TM) SE Runtime Environment (build 1.6.0_13-b03-211)
>>>>>>>> Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02-83, mixed
 
>>>>>>>> mode)
>>>>>>>>
>>>>>>>> Hadoop is: 0.20.0, r763504
>>>>>>>>
>>>>>>>> I'm compiling mahout from trunk (r794023) as follows (in
the  
>>>>>>>> root of the project directory):
>>>>>>>>
>>>>>>>> % mvn install
>>>>>>>> % hadoop jar examples/target/mahout-examples-0.2-SNAPSHOT.job
 
>>>>>>>> org.apache.mahout.clustering.syntheticcontrol.kmeans.Job
>>>>>>>>
>>>>>>>> The only difference (for dirichlet) is the different class
to  
>>>>>>>> run.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Paul
>>>>>>>>
>>>>>>>> On 16 Jul 2009, at 11:33, Grant Ingersoll wrote:
>>>>>>>>
>>>>>>>>> Can you share how you built and how you are running,
as in  
>>>>>>>>> command line options, etc.?  Also, JDK version, Hadoop
 
>>>>>>>>> version, etc.
>>>>>>>>>
>>>>>>>>> On Jul 16, 2009, at 6:21 AM, Paul Ingles wrote:
>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> Thank you for the suggestion. Unfortunately, when
I tried  
>>>>>>>>>> that I received the same error. I've also tried copying
the  
>>>>>>>>>> gson jar directly into $HADOOP_HOME/lib (when I was
running  
>>>>>>>>>> a single node pseudo-distributed) and get the same
error  
>>>>>>>>>> still.
>>>>>>>>>>
>>>>>>>>>> Weirdly enough, if I try and run the Dirichlet example
on  
>>>>>>>>>> the cluster I receive another ClassNotFoundException:
>>>>>>>>>>
>>>>>>>>>> 09/07/16 10:27:54 INFO mapred.JobClient: Task Id
:  
>>>>>>>>>> attempt_200907161026_0002_m_000001_0, Status : FAILED
>>>>>>>>>> java.lang.RuntimeException: Error in configuring
object
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:

>>>>>>>>>> 93)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop 
>>>>>>>>>> .util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>>>>>>>>>  at  
>>>>>>>>>> org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:

>>>>>>>>>> 352)
>>>>>>>>>>  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>>>>>>>>>>  at org.apache.hadoop.mapred.Child.main(Child.java:170)
>>>>>>>>>> Caused by: java.lang.reflect.InvocationTargetException
>>>>>>>>>>  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.ReflectionUtils.setJobConf(ReflectionUtils.java:

>>>>>>>>>> 88)
>>>>>>>>>>  ... 5 more
>>>>>>>>>> Caused by: java.lang.RuntimeException: Error in configuring
 
>>>>>>>>>> object
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:

>>>>>>>>>> 93)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .hadoop 
>>>>>>>>>> .util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>>>>>>>>>>  at  
>>>>>>>>>> org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:

>>>>>>>>>> 34)
>>>>>>>>>>  ... 10 more
>>>>>>>>>> Caused by: java.lang.reflect.InvocationTargetException
>>>>>>>>>>  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.ReflectionUtils.setJobConf(ReflectionUtils.java:

>>>>>>>>>> 88)
>>>>>>>>>>  ... 13 more
>>>>>>>>>> Caused by: java.lang.RuntimeException:  
>>>>>>>>>> java.lang.ClassNotFoundException:  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .syntheticcontrol.dirichlet.NormalScModelDistribution
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .dirichlet 
>>>>>>>>>> .DirichletMapper.getDirichletState(DirichletMapper.java:95)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .dirichlet.DirichletMapper.configure(DirichletMapper.java:60)
>>>>>>>>>>  ... 18 more
>>>>>>>>>> Caused by: java.lang.ClassNotFoundException:  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .syntheticcontrol.dirichlet.NormalScModelDistribution
>>>>>>>>>>  at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>>>>>>>>>>  at java.security.AccessController.doPrivileged(Native
Method)
>>>>>>>>>>  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>>>>>>>>>>  at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
>>>>>>>>>>  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:

>>>>>>>>>> 288)
>>>>>>>>>>  at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .dirichlet.DirichletDriver.createState(DirichletDriver.java:

>>>>>>>>>> 121)
>>>>>>>>>>  at  
>>>>>>>>>> org 
>>>>>>>>>> .apache 
>>>>>>>>>> .mahout 
>>>>>>>>>> .clustering 
>>>>>>>>>> .dirichlet 
>>>>>>>>>> .DirichletMapper.getDirichletState(DirichletMapper.java:71)
>>>>>>>>>>  ... 19 more
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hoping this sparks some other suggestions :)
>>>>>>>>>>
>>>>>>>>>> Thanks,
>>>>>>>>>> Paul
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Wed Jul 15 22:08:09 UTC 2009, Adil Aijaz <adil@yahoo-inc.com

>>>>>>>>>> > wrote:
>>>>>>>>>>> try hadoop --config <hod-cluster-dir> jar
-libjars <path to  
>>>>>>>>>>> gson.jar>
>>>>>>>>>>> <your job/jar file> <your class>
<arguments>
>>>>>>>>>>>
>>>>>>>>>>> Adil
>>>>>>>>>>>
>>>>>>>>>>> Paul Ingles wrote:
>>>>>>>>>>>> Hi,
>>>>>>>>>>>>
>>>>>>>>>>>> Apologies for the cross-posting (I also sent
this to the  
>>>>>>>>>>>> Hadoop user
>>>>>>>>>>>> list) but I'm still getting errors if I try
and run the  
>>>>>>>>>>>> KMeans
>>>>>>>>>>>> examples on a cluster, whether that be my
single-node Mac  
>>>>>>>>>>>> Pro, or our
>>>>>>>>>>>> cluster. I've attached the stack trace at
the bottom of  
>>>>>>>>>>>> the email.
>>>>>>>>>>>>
>>>>>>>>>>>> The gson jar is definitely included in the
packaged .job,  
>>>>>>>>>>>> and is also
>>>>>>>>>>>> in the temporary directory when the task
tracker picks up  
>>>>>>>>>>>> the work.
>>>>>>>>>>>> The gson jar also includes TypeToken.class
in the expected  
>>>>>>>>>>>> path.
>>>>>>>>>>>>
>>>>>>>>>>>> Again, really appreciate people's help in
getting this  
>>>>>>>>>>>> going!
>>>>>>>>>>>>
>>>>>>>>>>>> ----snip----
>>>>>>>>>>>> 09/07/15 17:06:38 INFO mapred.JobClient:
Task Id :
>>>>>>>>>>>> attempt_200907151617_0010_m_000000_0, Status
: FAILED
>>>>>>>>>>>> java.lang.NoClassDefFoundError: com/google/gson/reflect/

>>>>>>>>>>>> TypeToken
>>>>>>>>>>>> at java.lang.ClassLoader.defineClass1(Native
Method)
>>>>>>>>>>>> at java.lang.ClassLoader.defineClass(ClassLoader.java:703)
>>>>>>>>>>>> at
>>>>>>>>>>>> java 
>>>>>>>>>>>> .security 
>>>>>>>>>>>> .SecureClassLoader.defineClass(SecureClassLoader.java:124)
>>>>>>>>>>>> at java.net.URLClassLoader.defineClass(URLClassLoader.java:

>>>>>>>>>>>> 260)
>>>>>>>>>>>> at java.net.URLClassLoader.access$000(URLClassLoader.java:

>>>>>>>>>>>> 56)
>>>>>>>>>>>> at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>>>>>>>>>>>> at java.security.AccessController.doPrivileged(Native
 
>>>>>>>>>>>> Method)
>>>>>>>>>>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:

>>>>>>>>>>>> 188)
>>>>>>>>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
>>>>>>>>>>>> at sun.misc.Launcher 
>>>>>>>>>>>> $AppClassLoader.loadClass(Launcher.java:330)
>>>>>>>>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:254)
>>>>>>>>>>>> at  
>>>>>>>>>>>> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:

>>>>>>>>>>>> 402)
>>>>>>>>>>>> at
>>>>>>>>>>>> org 
>>>>>>>>>>>> .apache 
>>>>>>>>>>>> .mahout 
>>>>>>>>>>>> .matrix.AbstractVector.asFormatString(AbstractVector.java:

>>>>>>>>>>>> 374)
>>>>>>>>>>>>
>>>>>>>>>>>> at
>>>>>>>>>>>> org 
>>>>>>>>>>>> .apache 
>>>>>>>>>>>> .mahout 
>>>>>>>>>>>> .clustering 
>>>>>>>>>>>> .kmeans.Cluster.outputPointWithClusterInfo(Cluster.java:198)
>>>>>>>>>>>>
>>>>>>>>>>>> at
>>>>>>>>>>>> org 
>>>>>>>>>>>> .apache 
>>>>>>>>>>>> .mahout 
>>>>>>>>>>>> .clustering 
>>>>>>>>>>>> .kmeans.KMeansClusterMapper.map(KMeansClusterMapper.java:39)
>>>>>>>>>>>>
>>>>>>>>>>>> at
>>>>>>>>>>>> org 
>>>>>>>>>>>> .apache 
>>>>>>>>>>>> .mahout 
>>>>>>>>>>>> .clustering 
>>>>>>>>>>>> .kmeans.KMeansClusterMapper.map(KMeansClusterMapper.java:32)
>>>>>>>>>>>>
>>>>>>>>>>>> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
>>>>>>>>>>>> at  
>>>>>>>>>>>> org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:

>>>>>>>>>>>> 356)
>>>>>>>>>>>> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
>>>>>>>>>>>> at org.apache.hadoop.mapred.Child.main(Child.java:170)
>>>>>>>>>>>> Caused by: java.lang.ClassNotFoundException:
>>>>>>>>>>>> com.google.gson.reflect.TypeToken
>>>>>>>>>>>> at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>>>>>>>>>>>> at java.security.AccessController.doPrivileged(Native
 
>>>>>>>>>>>> Method)
>>>>>>>>>>>> at java.net.URLClassLoader.findClass(URLClassLoader.java:

>>>>>>>>>>>> 188)
>>>>>>>>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
>>>>>>>>>>>> at sun.misc.Launcher 
>>>>>>>>>>>> $AppClassLoader.loadClass(Launcher.java:330)
>>>>>>>>>>>> at java.lang.ClassLoader.loadClass(ClassLoader.java:254)
>>>>>>>>>>>> at  
>>>>>>>>>>>> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:

>>>>>>>>>>>> 402)
>>>>>>>>>>>> ... 20 more
>>>>>>>>>>>> ----snip----
>>>>>>>>>>>>
>>>>>>>>>>>> Incidentally, as part of this work I've also
implemented a  
>>>>>>>>>>>> Pearson
>>>>>>>>>>>> distance measure, if people think it would
be useful to be  
>>>>>>>>>>>> folded in
>>>>>>>>>>>> I'd be happy to get the SVN patch with tests
and  
>>>>>>>>>>>> implementation together.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks,
>>>>>>>>>>>> Paul
>>>>>>>>>
>>>>>>>>> --------------------------
>>>>>>>>> Grant Ingersoll
>>>>>>>>> http://www.lucidimagination.com/
>>>>>>>>>
>>>>>>>>> Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/

>>>>>>>>> Droids) using Solr/Lucene:
>>>>>>>>> http://www.lucidimagination.com/search
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>> --------------------------
>> Grant Ingersoll
>> http://www.lucidimagination.com/
>>
>> Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids)  
>> using Solr/Lucene:
>> http://www.lucidimagination.com/search
>>
> 
> 
> 

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