Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration

Question

I am using Hadoop 1.0.3 and HBase 0.94.22. I am trying to run a mapper program to read values from a Hbase table and output them to a file. I am getting the following error:

Answer 1

I tried editing the hadoop-env.sh file, but the changes mentioned here didn't work for me.

What worked is this:

export HADOOP_CLASSPATH="$HADOOP_CLASSPATH:$HBASE_HOME/lib/*"

I just added that at the end of my hadoop-env.sh. Do not forget to set your HBASE_HOME variable. You can also replace the $HBASE_HOME with the actual path of your hbase installation.