Hi
I am using mahout 0.7 with hadoop 0.20.205 and getting ClassCastException
when running mahout cvb command for lucene vectors.
It seems like LongWritable is tried to cast to IntWritable.
Is there something I am missing?
Regards, Markus
/opt/mahout/bin/mahout lucene.vector --dir
/home/markus/workspace/lucene-index --output
../mahout-files/vectors/content --field content --dictOut
../mahout-files/dictionaries/content --norm 2 --idField personId
--maxDFPercent 20 --minDF 2 -w TFIDF
/opt/mahout/bin/mahout cvb -D mapred.child.java.opts=-Xmx2048M --input
../mahout-files/vectors/content --output ../mahout-files/lda-workdir
--num_terms 30957 --overwrite --num_topics 20 --doc_topic_output
../mahout-files/lda-training --maxIter 10 --tempDir ../mahout-files/lda-temp
MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
Running on hadoop, using /usr/bin/hadoop and HADOOP_CONF_DIR=/etc/hadoop
MAHOUT-JOB: /opt/mahout/mahout-examples-0.7-job.jar
Picked up JAVA_TOOL_OPTIONS: -XX:+UseBiasedLocking
Picked up JAVA_TOOL_OPTIONS: -XX:+UseBiasedLocking
12/08/10 08:18:02 INFO common.AbstractJob: Command line arguments:
{--convergenceDelta=[0], --doc_topic_output=[../mahout-files/lda-training],
--doc_t
opic_smoothing=[0.0001], --endPhase=[2147483647],
--input=[../mahout-files/vectors/content], --iteration_block_size=[10],
--maxIter=[10], --max_doc_to
pic_iters=[10], --num_reduce_tasks=[10], --num_terms=[30957],
--num_topics=[20], --num_train_threads=[4], --num_update_threads=[1],
--output=[../mahou
t-files/lda-workdir], --overwrite=null, --startPhase=[0],
--tempDir=[../mahout-files/lda-temp], --term_topic_smoothing=[0.0001],
--test_set_fraction=[
0]}
12/08/10 08:18:02 INFO cvb.CVB0Driver: Will run Collapsed Variational Bayes
(0th-derivative approximation) learning for LDA on ../mahout-files/vectors
/content (numTerms: 30957), finding 20-topics, with document/topic prior
1.0E-4, topic/term prior 1.0E-4. Maximum iterations to run will be 10,
unles
s the change in perplexity is less than 0.0. Topic model output
(p(term|topic) for each topic) will be stored ../mahout-files/lda-workdir.
Random in
itialization seed is 2871, holding out 0.0 of the data for perplexity check
12/08/10 08:18:02 INFO cvb.CVB0Driver: p(topic|docId) will be stored
../mahout-files/lda-training
12/08/10 08:18:02 INFO cvb.CVB0Driver: Current iteration number: 0
12/08/10 08:18:02 INFO cvb.CVB0Driver: About to run iteration 1 of 10
12/08/10 08:18:02 INFO cvb.CVB0Driver: About to run: Iteration 1 of 10,
input path: ../mahout-files/lda-temp/topicModelState/model-0
12/08/10 08:18:02 INFO util.NativeCodeLoader: Loaded the native-hadoop
library
12/08/10 08:18:02 INFO input.FileInputFormat: Total input paths to process
: 1
12/08/10 08:18:03 INFO mapred.JobClient: Running job: job_local_0001
12/08/10 08:18:03 INFO util.ProcessTree: setsid exited with exit code 0
12/08/10 08:18:03 INFO mapred.Task: Using ResourceCalculatorPlugin :
org.apache.hadoop.util.LinuxResourceCalculatorPlugin@1a1399
12/08/10 08:18:03 INFO mapred.MapTask: io.sort.mb = 10
12/08/10 08:18:03 INFO mapred.MapTask: data buffer = 7969177/9961472
12/08/10 08:18:03 INFO mapred.MapTask: record buffer = 26214/32768
12/08/10 08:18:03 INFO zlib.ZlibFactory: Successfully loaded & initialized
native-zlib library
12/08/10 08:18:03 INFO compress.CodecPool: Got brand-new decompressor
12/08/10 08:18:03 INFO cvb.CachingCVB0Mapper: Retrieving configuration
12/08/10 08:18:03 INFO cvb.CachingCVB0Mapper: Initializing read model
12/08/10 08:18:03 INFO cvb.CachingCVB0Mapper: No model files found
12/08/10 08:18:03 INFO cvb.CachingCVB0Mapper: Initializing write model
12/08/10 08:18:03 INFO cvb.CachingCVB0Mapper: Initializing model trainer
12/08/10 08:18:03 INFO cvb.ModelTrainer: Starting training threadpool with
4 threads
12/08/10 08:18:03 WARN mapred.LocalJobRunner: job_local_0001
java.lang.ClassCastException: org.apache.hadoop.io.LongWritable cannot be
cast to org.apache.hadoop.io.IntWritable
at
org.apache.mahout.clustering.lda.cvb.CachingCVB0Mapper.map(CachingCVB0Mapper.java:55)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
12/08/10 08:18:04 INFO mapred.JobClient: map 0% reduce 0%
12/08/10 08:18:04 INFO mapred.JobClient: Job complete: job_local_0001
12/08/10 08:18:04 INFO mapred.JobClient: Counters: 0
Exception in thread "main" java.lang.InterruptedException: Failed to
complete iteration 1 stage 1
at
org.apache.mahout.clustering.lda.cvb.CVB0Driver.runIteration(CVB0Driver.java:518)
at
org.apache.mahout.clustering.lda.cvb.CVB0Driver.run(CVB0Driver.java:304)
at
org.apache.mahout.clustering.lda.cvb.CVB0Driver.run(CVB0Driver.java:187)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at
org.apache.mahout.clustering.lda.cvb.CVB0Driver.main(CVB0Driver.java:550)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195)
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:156)
