mysql 错误总结

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1. ERROR 2049 (HY000): Connection using old (pre-4.1.1) authentication protocol refused

Reason:

This is not a bug if you have user accounts with passwords that used the ancient old hashing algorithm. If you read the bug report mentioned in the link you posted:

http://bugs.mysql.com/bug.php?id=69027


Resolve Method: 

Modify the my.ini

[client]secure-auth=off


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