1：錯誤日志大量錯誤
150602 14:40:02 [Warning] Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. INSERT... SELECT... ON DUPLICATE KEY UPDATE is unsafe because the order in which rows are retrieved by the SELECT determines which (if any) rows are updated. This order cannot be predicted and may differ on master and the slave. Statement:INSERT INTO tab_name
2：原因：
查了下原因，tab_name 這個表上有2個唯一鍵。則使用INSERT … ON DUPLICATE KEY UPDATE ，且當前數據庫binlog_format是statement格式，這種sql語句就會報unsafe。
官方手冊：
INSERT … ON DUPLICATE KEY UPDATE statements on tables with multiple primary or unique keys.When executed against a table that contains more than one primary or unique key, this statement is considered unsafe, being sensitive to the order in which the storage engine checks the keys, which is not deterministic, and on which the choice of rows updated by the MySQL Server depends.
解決方法：
把binlog_format設置為ROW或者STATEMENT或者修改SQL