you can check this wiki http://wiki.apache.org/hama/GettingStarted
> On Thu, Oct 23, 2008 at 1:42 PM, zhuguanyin <[EMAIL PROTECTED]> wrote: > > hi, I'm a newbie for hama, I set up a hadoop/hbase cluster, and the hama > > environment, but I couldn't run the examples successfull. > > > > 1) I don't know how to set the hama-site.xml, if there is a > > hama-default.xml, it would be very helpful. > > here is my hama-site.xml: > > A good suggestion. Now in hama, a quick way is dealing with conf/hama-env.sh. let $HADOOP_CONF_DIR point to your hadoop cluster's configuration. let $HBASE_CONF_DIR point to your hadoop cluster's configuration. can you try it again and let us know. > > > <configuration> > > > > <property> > > <name>mapred.jar</name> > > <value>/home/zhugy/hama/hama-trunk/hama-0.1.0-dev.jar</value> > > </property> > > > > <property> > > <name>hbase.rootdir</name> > > <value>hdfs://jx-hadoop-data08.jx:52310/hbase-v1</value> > > <description>The directory shared by region servers. > > Should be fully-qualified to include the filesystem to use. > > E.g: hdfs://NAMENODE_SERVER:PORT/HBASE_ROOTDIR > > </description> > > </property> > > > > <property> > > <name>hbase.master</name> > > <value>jx-hadoop-data08.jx:62310</value> > > <description>The host and port that the HBase master runs at. > > A value of 'local' runs the master and a regionserver in > > a single process. > > </description> > > </property> > > </configuration> > > > > > > 2) When I test the matrix addition examples: > > hama/hama-trunk/bin/hama examples addition -m 2 -r 1 2 2 > > > > > > I get the follow stderr on map-reduce's stderr on task: > > > > java.lang.NullPointerException > > at org.apache.hama.HamaAdminImpl.initialJob(HamaAdminImpl.java:51) > > at org.apache.hama.HamaAdminImpl.<init>(HamaAdminImpl.java:46) > > at > org.apache.hama.AbstractMatrix.setConfiguration(AbstractMatrix.java:62) > > at org.apache.hama.DenseMatrix.<init>(DenseMatrix.java:66) > > at > org.apache.hama.algebra.Add1DLayoutMap.configure(Add1DLayoutMap.java:43) > > at > org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) > > at > org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82) > > at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:33) > > at > org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) > > at > org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:223) > > at > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207) > > java.lang.NullPointerException > > at > org.apache.hama.HamaAdminImpl.matrixExists(HamaAdminImpl.java:79) > > at org.apache.hama.DenseMatrix.<init>(DenseMatrix.java:68) > > at > org.apache.hama.algebra.Add1DLayoutMap.configure(Add1DLayoutMap.java:43) > > at > org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) > > at > org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82) > > at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:33) > > at > org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) > > at > org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:82) > > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:223) > > at > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2207) > > > > > > > > thanks! > > > > > > <http://blog.udanax.org> >
