遇到异常com.mysql.jdbc.exceptions.jd

异常内容：

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:javax.jdo.JDODataStoreException: An exception was thrown while adding/validating class(es) : Specified key was too long; max key length is 767 bytes.

    com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

    at com.mysql.jdbc.Util.getInstance(Util.java:381)

解决办法：

　　经过百度查找及自己的实际操作，得到了解决方法如下：

        第一步，删除Hive连接MySQL数据库中存放metastore元数据的数据库：drop database metastore

        第二步，新建存放元数据库的数据：create database metastore

        第三步，修改数据的编码为latin1 ：alter database metastorecharacter set latin1