Question

我将Hive配置为使用mysql Metastore。它工作正常。

但是当我试图放弃一张桌子时，我会收到如下错误。

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

我做了一些研究，谷歌和official faq告诉我，更改mysql字符集设置将解决这个问题。

我的mysql设置如下

mysql> show variables like '%char%';
+--------------------------+----------------------------------------+
| Variable_name            | Value                                  |
+--------------------------+----------------------------------------+
| character_set_client     | utf8                                   |
| character_set_connection | utf8                                   |
| character_set_database   | utf8                                   |
| character_set_filesystem | binary                                 |
| character_set_results    | utf8                                   |
| character_set_server     | utf8                                   |
| character_set_system     | utf8                                   |
| character_sets_dir       | /usr/local/mysql/share/mysql/charsets/ |
+--------------------------+----------------------------------------+
8 rows in set (0.02 sec)

我将所有字符集设置从utf8更改为latin1，character_set_filesystem，character_set_system，character_sets_dir除外。

即使这样做，我在尝试删除表时仍会遇到相同的错误。更糟糕的是，每当我创建一个新表时，mysql字符集设置将重置为utf-8。

有人可以帮忙吗？

Answer 1

问题是在hive-site.xml中它在下面的创建'hive'中使用了另一个数据库

 <property>
 <name>javax.jdo.option.ConnectionURL</name>
 <value>jdbc:mysql://localhost:3306/hive?createDatabaseIfNotExist=true</value>
 </property>

将数据库名称更改为您已经在mysql中创建的'Metastore'，如此

<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://localhost:3306/metastore?createDatabaseIfNotExist=true</value>
</property>

希望这可以解决我遇到同样问题的问题，我就这样解决了。友情马图克

创建Hive表会自动更改mysql Metastore的charset设置

1 个答案: