第一个问题:安装mysql后,进行了权限语句的执行:mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;然后进行:mysql> FLUSH PRIVILEGES;
但是启动hive时出现:Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
第二个问题:进行数据库的初始化时:[hadoop@spark01 ~]$ schematool -dbType mysql -initSchema
出现如下的问题:
[hadoop@spark01 ~]$ schematool -dbType mysql -initSchema
Metastore connection URL: jdbc:mysql://spark01:3306/hivedb?createDatabaseIfNotExist=trueMetastore Connection Driver : com.mysql.jdbc.Driver
Metastore connection User: root
org.apache.hadoop.hive.metastore.HiveMetaException: Failed to get schema version.
*** schemaTool failed ***
总结:经过分析,发现这是因为我在安装的时候,将hive和mysql装在了同一台主机上,导致了这个问题,我们的解决方案是如果将hive和mysql装在了同一台主句上,我们要将hive-site.xml中的主机名:jdbc:mysql://spark01:3306改为jdbc:mysql://localhost:3306;必须这样设置!!
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value> jdbc:mysql://localhost:3306/hivedb?createDatabaseIfNotExist=true</value><description>JDBC connect string for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
<description>Driver class name for a JDBC metastore</description>
</property>
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>root</value>
<description>username to use against metastore database</description>
</property>
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>root</value>
<description>password to use against metastore database</description>
</property>
<property>
<name>hive.metastore.warehouse.dir</name>
<value>/user/hive/warehouse</value>
<description>hive default warehouse, if nessecory, change it</description>
</property>