Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionExcep linux下mysql修改连接超时wait_timeout修改后就ok了

Linux下mysql修改连接超时wait_timeout

1,首先：

show variables like '%timeout%'；

显示结果：

+-----------------------------+----------+

| Variable_name               | Value    |

+-----------------------------+----------+

| connect_timeout             | 10       |

| delayed_insert_timeout      | 300      |

| innodb_flush_log_at_timeout | 1        |

| innodb_lock_wait_timeout    | 50       |

| innodb_rollback_on_timeout  | OFF      |

| interactive_timeout         | 28800    |

| lock_wait_timeout           | 31536000 |

| net_read_timeout            | 30       |

| net_write_timeout           | 60       |

| rpl_stop_slave_timeout      | 31536000 |

| slave_net_timeout           | 3600     |

| wait_timeout                | 28800    |

+-----------------------------+----------+

12 rows in set (0.00 sec)

其中有用的是： interactive_timeout  和wait_timeout  为28800，默认为8小时设置；

一般线上的环境中mysql中连接时间设置为7天即可；

2,其次：

执行命令：       set  interactive_timeout=604800；

set  wait_timeout=604800；

最后：执行​show variables like '%timeout%'；看看执行成功没有，显示结果为：

​

+-----------------------------+----------+

| Variable_name               | Value    |

+-----------------------------+----------+

| connect_timeout             | 10       |

| delayed_insert_timeout      | 300      |

| innodb_flush_log_at_timeout | 1        |

| innodb_lock_wait_timeout    | 50       |

| innodb_rollback_on_timeout  | OFF      |

| interactive_timeout         | 604800   |

| lock_wait_timeout           | 31536000 |

| net_read_timeout            | 30       |

| net_write_timeout           | 60       |

| rpl_stop_slave_timeout      | 31536000 |

| slave_net_timeout           | 3600     |

| wait_timeout                | 604800   |

+-----------------------------+----------+

12 rows in set (0.00 sec)

表明执行成功了。。。