Got to ask this again. 

I installed and started Hadoop-0.20.0 on a cluster with two boxes properly.
Then I just follow the steps Paul gave to install mahout on the master node.
After that i can run canopy with no problem. But I cannot run kmeans. There
is always the error java.lang.NoClassDefFoundError:
com/google/gson/reflect/TypeToken.

Can Paul, or Grant, help me out this please, thanks!


tigertail wrote:
> 
> 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 <[email protected] 
>>>>>>>>>>> > 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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