hive连接mysql配置

obeckham

1、进入hive/conf目录下，修改hive-default.xml:
<property>
  <name>hive.metastore.local</name>
  <value>true</value>
</property>
<property>
  <name>javax.jdo.option.ConnectionURL</name>
  <value>jdbc:mysql://192.168.0.121:3307/hive?createDatabaseIfNotExist=true</value>
</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>/home/hadoop/hive/warehouse</value>
  <description>location of default database for the warehouse</description>
</property>


然后启动 bin/hive，执行show tables命令 这时报FAILED: Error in metadata: javax.jdo.JDOFatalDataStoreException: Access denied for user 'root'@'fuyanqing.feinno.com' (using password: YES)。这是因为mysql不允许远程访问的问题，执行 grant all on *.*  to 'root'@'%' identified by 'root';
然后再执行show tables命令，这时报：FAILED: Error in metadata: javax.jdo.JDODataStoreException: An exception was thrown while adding/validating class(es) : Specified key was too long; max key length is 767 bytes。
这个问题是因为hive对mysql的UTF-8编码方式有限制，修改一下mysql的编码方式即可：alter database name character set latin1;