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:
<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!
