hbase Coprocessor问题

请教大家个问题，我用CoprocessorProtocol做一个行数统计，报异常如下求帮助
org.apache.hadoop.hbase.ipc.HBaseRPC$UnknownProtocolException: No matching handler for protocol com.snsoft.hbase.createtable.EndPoint$CounterProtocol in region sn_tianqi_yubao,,1386917571498.97fc032278c764301a6d06775d6d9d2b.