启动hive的metastore或者启动hive后执行命令报错如下：
Failed: HiveException java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.me
原因分析：
是由于没有初始化数据库导致，执行名称初始化数据库即可。
解决办法：
执行命令：schematool -dbType MysqL -initSchema
[oldlu@bigdata-training hadoop-2.6.0-cdh5.7.6]$ schematool -dbType MysqL -initSchema
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/modules/hive-3.1.1/lib/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/cdh-5.7.6/hadoop-2.6.0-cdh5.7.6/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
metastore connection URL: jdbc:MysqL://bigdata-training.fuyun.com/hive3metastore?createDatabaseIfNotExist=true&characterEncoding=UTF-8
metastore Connection Driver : com.MysqL.jdbc.Driver
metastore connection User: root
Starting metastore schema initialization to 3.1.0
Initialization script hive-schema-3.1.0.MysqL.sql
Initialization script completed
schemaTool completed
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