hive-1.2.1与hadoop-2.7.3安装出现的二个问题解决

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=true
Metastore 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>