当在hive中show table 时如果报以下错时
FAILED: Error in metadata: javax.jdo.JDODataStoreException: Error(s) were found while auto-creating/validating the datastore for classes. The errors are printed in the log, and are attached to this exception.
NestedThrowables:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask
（略去 很多java 提示）
是到mysql中的hive数据库里执行 alter database hive character set latin1;改变hive元数据库的字符集，问题就可以解决！
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