I can confirm the way you are running this doesn't work and I think it is both b/c the constructor isn't public, but also because the DisplayClustering classes (DisplayCanopy, DisplayKMeans) are intended to be run by invoking the main() method, whereas the bin/mahout program is invoking the MahoutDriver class which tries to invoke ProgramDriver which tries to construct something it doesn't have access to.
Can you open a JIRA issue for this? In the meantime, the workaround is to invoke the DisplayCanopy.main() class as you would w/ a normal Java program. On Feb 22, 2011, at 12:18 AM, Sengupta, Sohini IN BLR SISL wrote: > Hi everyone, > I am very new to Mahout. I managed to set it up and run it on hadoop. > However, I am facing problems when I try to execute DisplayCanopy program on > hadoop. I get following error: > > Running on hadoop, using HADOOP_HOME=/usr/local/hadoop > No HADOOP_CONF_DIR set, using /usr/local/hadoop/conf > 11/02/21 04:00:11 WARN driver.MahoutDriver: No > org.apache.mahout.clustering.display.DisplayCanopy.props found on classpath, > will use command-line arguments only > Exception in thread "main" java.lang.IllegalAccessException: Class > org.apache.hadoop.util.ProgramDriver$ProgramDescription can not access a > member of class org.apache.mahout.clustering.display.DisplayCanopy with > modifiers "public static" > at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65) > at java.lang.reflect.Method.invoke(Method.java:588) > at > org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68) > at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139) > at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:184) > 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) > > At command prompt, I give the following command: > > /usr/local/mahout-distribution-0.4/bin/mahout > org.apache.mahout.clustering.display.DisplayCanopy > > I have set all relevant environment variables. > Any pointers are welcome. > > Thanks a lot in advance for your help. > Regards, > Sohini > > ________________________________ > Important notice: This e-mail and any attachment there to contains corporate > proprietary information. If you have received it by mistake, please notify us > immediately by reply e-mail and delete this e-mail and its attachments from > your system. > Thank You. -------------------------- Grant Ingersoll http://www.lucidimagination.com/ Search the Lucene ecosystem docs using Solr/Lucene: http://www.lucidimagination.com/search
