Apache HBase 0.90.x does not ship with hadoop-0.20.205.x, etc. To make it run, you need to replace the hadoop
jars that Apache HBase shipped with in its lib directory with those of the Hadoop you want to
run HBase on. If even after replacing Hadoop jars you get the below exception:
sv4r6s38: Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/configuration/Configuration sv4r6s38: at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<init>(DefaultMetricsSystem.java:37) sv4r6s38: at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<clinit>(DefaultMetricsSystem.java:34) sv4r6s38: at org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51) sv4r6s38: at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:209) sv4r6s38: at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:177) sv4r6s38: at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:229) sv4r6s38: at org.apache.hadoop.security.KerberosName.<clinit>(KerberosName.java:83) sv4r6s38: at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:202) sv4r6s38: at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:177)
you need to copy under hbase/lib, the
commons-configuration-X.jar you find in your Hadoop's
lib directory. That should fix the above complaint.
If you see something like the following in your logs ... 2012-09-24
10:20:52,168 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting
shutdown. org.apache.hadoop.ipc.RemoteException: Server IPC version 7 cannot communicate
with client version 4 ... ...are you trying to talk to an Hadoop 2.0.x
from an HBase that has an Hadoop 1.0.x client? Use the HBase built against Hadoop 2.0 or
rebuild your HBase passing the -Dhadoop.profile=2.0 attribute to Maven
(See Section 18.4.1.3, “Building against various hadoop versions.” for more).