MySQL错误: could not retrieve transation read-only status server
2016-10-27 20:15
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问题描述: java代码在开始事务后,先做了一个查询,再insert,此时会报: java.sql.SQLException: could not retrieve transation read-only status server
解决过程:
查看mysql的事物隔离级别 SHOW VARIABLES LIKE '%iso%';
返回结果: REPEATABLE-READ
把这个改成:READ-COMMITTED 就好了: SET GLOBAL tx_isolation='READ-COMMITTED';
(记得java重启应用,要永久生效的就改my.ini配置文件)
问题分析:
当数据库隔离级别为REPEATABLE-READ时,查询一个select语句也算是事物的开始,而且在hibernate里会把以select语句开头的事务标记为只读事务,此时在这个事务里再执行insert、update、delete等DML语句就会报错。
http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_tx_read_only
来自为知笔记(Wiz)
解决过程:
查看mysql的事物隔离级别 SHOW VARIABLES LIKE '%iso%';
返回结果: REPEATABLE-READ
把这个改成:READ-COMMITTED 就好了: SET GLOBAL tx_isolation='READ-COMMITTED';
(记得java重启应用,要永久生效的就改my.ini配置文件)
问题分析:
当数据库隔离级别为REPEATABLE-READ时,查询一个select语句也算是事物的开始,而且在hibernate里会把以select语句开头的事务标记为只读事务,此时在这个事务里再执行insert、update、delete等DML语句就会报错。
http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_tx_read_only
来自为知笔记(Wiz)
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