Communications link failure during commit(). Transaction resolution unknown

@Controller
@Transactional(rollbackFor = { Exception.class })
@RequestMapping("/hx")
public class HXController {

 

 

 

项目类上@Transactional(rollbackFor = { Exception.class })注解

项目中打断点 时间过长在运行  会报错Communications link failure during commit(). Transaction resolution unknown

 

 

 

登录mysql ：

重启mysql服务器  service mysql restart

 

删掉进程 show processlist;
找到锁进程，kill id ;

 

重启web项目