java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration

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> > org/apache/hadoop/hbase/client/HTableInterface
java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:587)
at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:605)
at org.apache.hadoop.mapred.JobConf.getReducerClass(JobConf.java:788)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:250)

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