错误信息如下：
hive> show databases; FAILED: HiveException java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHivemetaStoreClient
解决方法：
执行命令：./hive --service metastore &
[sonkwo@sonkwo-bj-data001 bin]$ ./hive --service metastore &
重新启动hive问题解决：
[sonkwo@sonkwo-bj-data001 bin]$ ./hive which: no hbase in (/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/opt/module/jdk1.8.0_212/bin:/opt/module/ha/hadoop-3.1.3/bin:/opt/module/ha/hadoop-3.1.3/sbin:/opt/module/zookeeper-3.5.7/bin:/opt/module/hive-3.1.2/bin:/home/sonkwo/.local/bin:/home/sonkwo/bin) Hive Session ID = e30c7d1f-c2b7-403d-9f38-caaf1466244e Logging initialized using configuration in jar:file:/opt/module/hive-3.1.2/lib/hive-common-3.1.2.jar!/hive-log4j2.properties Async: true Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary. Hive-on-MR is deprecated in Hive 2 and may not be available in the future versions. Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases. Hive Session ID = 0844fb27-583d-4d85-81a8-29042a6682c2 hive> show databases; OK default Time taken: 0.784 seconds, Fetched: 1 row(s) hive>
