hive元数据报错？试了很多方法都没辙？也许你漏了这一步

进入hiveCLI后，输入show databases;
显示
FAILED: SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient

解决办法

cd /export/servers/hive-1.1.0-cdh5.14.0/bin
./hive --service metastore &