hi all,
I'm using mahout bayes model to predict some new data.
After I got the model by 'trainclassifier', I found this model would cause
out-of-memory when I was using 'testclassifer'.
I have tried to enlarge my java heap size to 4g, but it still did not work.
I felt it was very strange of trainclassifer's working well while
testclassifer's not working.
Do you know how to deal with this issue?
'java.lang.OutOfMemoryError: Java heap space
at
org.apache.mahout.math.map.OpenObjectIntHashMap.rehash(OpenObjectIntHashMap.java:435)
at
org.apache.mahout.math.map.OpenObjectIntHashMap.put(OpenObjectIntHashMap.java:387)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.getFeatureID(InMemoryBayesDatastore.java:131)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.setSumFeatureWeight(InMemoryBayesDatastore.java:153)
at
org.apache.mahout.classifier.bayes.SequenceFileModelReader.loadFeatureWeights(SequenceFileModelReader.java:82)
at
org.apache.mahout.classifier.bayes.SequenceFileModelReader.loadModel(SequenceFileModelReader.java:46)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.initialize(InMemoryBayesDatastore.java:72)
at
org.apache.mahout.classifier.bayes.ClassifierContext.initialize(ClassifierContext.java:44)
at
org.apache.mahout.classifier.bayes.mapreduce.bayes.BayesClassifierMapper.configure(BayesClassifierMapper.java:130)
... 22 more'
thanks,
mahout testclassifier -m /user/mahoutTest//bayes-model -d
/user/enyun/mahoutTest//bayes-test-input -type bayes -ng 1 -source hdfs -method
mapreduce
MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
Running on hadoop, using
HADOOP_HOME=/home/work/Programs/hadoop/hadoop-0.20.203.0/
HADOOP_CONF_DIR=/home/work/Programs/hadoop/hadoop-0.20.203.0//conf
MAHOUT-JOB:
/home/work/code/hadoop/mahout/mahout-trunk/trunk/examples/target/mahout-examples-0.6-SNAPSHOT-job.jar
11/12/30 16:22:59 WARN driver.MahoutDriver: No testclassifier.props found on
classpath, will use command-line arguments only
11/12/30 16:23:00 INFO common.HadoopUtil: Deleting
/user/mahoutTest/bayes-test-input-output
11/12/30 16:23:01 WARN mapred.JobClient: Use GenericOptionsParser for parsing
the arguments. Applications should implement Tool for the same.
11/12/30 16:23:01 INFO mapred.FileInputFormat: Total input paths to process : 2
11/12/30 16:23:02 INFO mapred.JobClient: Running job: job_201112231028_0058
11/12/30 16:23:03 INFO mapred.JobClient: map 0% reduce 0%
11/12/30 16:23:28 INFO mapred.JobClient: Task Id :
attempt_201112231028_0058_m_000000_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:431)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:371)
at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
at org.apache.hadoop.mapred.Child.main(Child.java:253)
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)
... 9 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)
... 14 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)
... 17 more
Caused by: java.lang.OutOfMemoryError: Java heap space
at
org.apache.mahout.math.map.OpenObjectIntHashMap.rehash(OpenObjectIntHashMap.java:435)
at
org.apache.mahout.math.map.OpenObjectIntHashMap.put(OpenObjectIntHashMap.java:387)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.getFeatureID(InMemoryBayesDatastore.java:131)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.setSumFeatureWeight(InMemoryBayesDatastore.java:153)
at
org.apache.mahout.classifier.bayes.SequenceFileModelReader.loadFeatureWeights(SequenceFileModelReader.java:82)
at
org.apache.mahout.classifier.bayes.SequenceFileModelReader.loadModel(SequenceFileModelReader.java:46)
at
org.apache.mahout.classifier.bayes.InMemoryBayesDatastore.initialize(InMemoryBayesDatastore.java:72)
at
org.apache.mahout.classifier.bayes.ClassifierContext.initialize(ClassifierContext.java:44)
at
org.apache.mahout.classifier.bayes.mapreduce.bayes.BayesClassifierMapper.configure(BayesClassifierMapper.java:130)
... 22 more
11/12/30 16:23:28 INFO mapred.JobClient: Task Id :
attempt_201112231028_0058_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:431)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:371)
at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
