Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionExcep
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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。。。
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