Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient
解决办法： 把metastore的相关配置设置为空就ｏｋ了．
我修改后的配置：
<property> <name>hive.metastore.metadb.dir</name> <value></value> <description>The location of filestore metadata base dir</description> </property> <property> <name>hive.metastore.uris</name> <value></value> <description>Comma separated list of URIs of metastore servers. The first server that can be connected to will be used.</description> </property> <property> <name>hive.metastore.warehouse.dir</name> <value></value> <description>location of default database for the warehouse</description> </property>