QueryWrapper<TaskInfo> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("TASK_ID", taskInfo.getTaskId());
queryWrapper.eq("RECEIVER_CODE", taskInfo.getReceiverCode());
return update(taskInfo, queryWrapper);
并没有什么并发操作，而且也不会同时去操作一条数据。 TASK_ID 是数据据库自增的id
报错信息如下
Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
The error may exist in com/hzwq/micro/tasknotice/dao/WorkOrderMapper.java (best guess)
The error may involve com.hzwq.micro.tasknotice.dao.WorkOrderMapper.update-Inline
The error occurred while setting parameters
SQL: UPDATE wf_task_info SET task_id=?, task_source_code=?, task_source_name=?, org_no=?, task_time=?, task_type=?, process_name=?, task_no=?, responsible_code=?, receiver_code=?, task_desc=?, end_time=?, warning_date=?, overdure_date=?, task_detail=?, task_status=?, insert_time=?, down_time=?, finish_time=? WHERE (TASK_ID = ? AND RECEIVER_CODE = ?)
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
]
[ DEBUG] [2021-01-28 14:33:22] org.springframework.jdbc.datasource.DataSourceTransactionManager -Initiating transaction rollback
[ DEBUG] [2021-01-28 14:33:22] org.springframework.jdbc.datasource.DataSourceTransactionManager -Rolling back JDBC transaction on Connection [com.mysql.jdbc.JDBC4Connection@4eb86e22]
[ DEBUG] [2021-01-28 14:33:22] org.springframework.jdbc.datasource.DataSourceTransactionManager -Releasing JDBC Connection [com.mysql.jdbc.JDBC4Connection@4eb86e22] after transaction
[ DEBUG] [2021-01-28 14:33:22] org.springframework.jdbc.datasource.DataSourceUtils -Returning JDBC Connection to DataSource
[ DEBUG] [2021-01-28 14:33:22] org.springframework.beans.factory.support.DefaultListableBeanFactory -Returning cached instance of singleton bean 'exceptionHandle'
[ DEBUG] [2021-01-28 14:33:22] org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver -Invoking @ExceptionHandler method: public com.hzwq.micro.tasknotice.responeresult.exception.ErrorResult com.hzwq.micro.tasknotice.responeresult.exception.ExceptionHandle.handle(java.lang.Exception)
[ ERROR] [2021-01-28 14:33:22] com.hzwq.micro.tasknotice.responeresult.exception.ExceptionHandle -【系统异常】{}
org.springframework.dao.DeadlockLoserDataAccessException:
Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
The error may exist in com/hzwq/micro/tasknotice/dao/WorkOrderMapper.java (best guess)
The error may involve com.hzwq.micro.tasknotice.dao.WorkOrderMapper.update-Inline
The error occurred while setting parameters
SQL: UPDATE wf_task_info SET task_id=?, task_source_code=?, task_source_name=?, org_no=?, task_time=?, task_type=?, process_name=?, task_no=?, responsible_code=?, receiver_code=?, task_desc=?, end_time=?, warning_date=?, overdure_date=?, task_detail=?, task_status=?, insert_time=?, down_time=?, finish_time=? WHERE (TASK_ID = ? AND RECEIVER_CODE = ?)
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
; SQL []; Deadlock found when trying to get lock; try restarting transaction; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:262)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:88)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
at com.sun.proxy.$Proxy113.update(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:287)
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:65)
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:96)
at com.sun.proxy.$Proxy119.update(Unknown Source)
at com.baomidou.mybatisplus.extension.service.IService.update(IService.java:163)
at com.hzwq.micro.tasknotice.service.impl.WorkOrderServiceImpl.changeOrderStautsByStauts(WorkOrderServiceImpl.java:457)
at com.hzwq.micro.tasknotice.service.impl.WorkOrderServiceImpl.repairCloseLoopOrder(WorkOrderServiceImpl.java:413)
at com.hzwq.micro.tasknotice.service.impl.WorkOrderServiceImpl$$FastClassBySpringCGLIB$$85372edb.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:736)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:671)
at com.hzwq.micro.tasknotice.service.impl.WorkOrderServiceImpl$$EnhancerBySpringCGLIB$$de4cccf0.repairCloseLoopOrder(<generated>)
at com.hzwq.micro.tasknotice.controller.WorkOrderController.standardOrderUpdate(WorkOrderController.java:271)
at sun.reflect.GeneratedMethodAccessor442.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:849)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:760)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
at sun.reflect.GeneratedConstructorAccessor469.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.Util.getInstance(Util.java:408)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:952)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2484)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1197)
at com.alibaba.druid.pool.DruidPooledPreparedStatement.execute(DruidPooledPreparedStatement.java:497)
at sun.reflect.GeneratedMethodAccessor257.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59)
at com.sun.proxy.$Proxy196.execute(Unknown Source)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)
at sun.reflect.GeneratedMethodAccessor376.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
at com.sun.proxy.$Proxy194.update(Unknown Source)
at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doUpdate(MybatisSimpleExecutor.java:54)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)
at sun.reflect.GeneratedMethodAccessor419.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
... 84 common frames omitted[ DEBUG] [2021-01-28 14:33:22] org.springframework.beans.factory.support.DefaultListableBeanFactory -Returning cached instance of singleton bean 'responseResultHandler'
[ DEBUG] [2021-01-28 14:33:22] org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor -Written [{RT_D=业务代码执行异常，请联系管理员, RT_F=2}] as "application/json" using [com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter@25325236]
[ WARN ] [2021-01-28 14:33:22] org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver -Resolved [org.springframework.dao.DeadlockLoserDataAccessException:
Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
The error may exist in com/hzwq/micro/tasknotice/dao/WorkOrderMapper.java (best guess)
The error may involve com.hzwq.micro.tasknotice.dao.WorkOrderMapper.update-Inline
The error occurred while setting parameters
SQL: UPDATE wf_task_info SET task_id=?, task_source_code=?, task_source_name=?, org_no=?, task_time=?, task_type=?, process_name=?, task_no=?, responsible_code=?, receiver_code=?, task_desc=?, end_time=?, warning_date=?, overdure_date=?, task_detail=?, task_status=?, insert_time=?, down_time=?, finish_time=? WHERE (TASK_ID = ? AND RECEIVER_CODE = ?)
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
表机构：
因为innodb支持的事务采用行锁，粒度更细了，但是会出现死锁（表锁是不会出现死锁的），就是你上面log中出现的deadlock。想必你应该不太了解死锁，简单解释一下：
死锁：例如说两个事务，事务A锁住了1~5行，同时事务B锁住了6~10行，此时事务A请求锁住6~10行，就会阻塞直到事务B施放6~10行的锁，而随后事务B又请求锁住1~5行，事务B也阻塞直到事务A释放1~5行的锁。死锁发生时，会产生Deadlock错误。
其实说白了就是自己锁住的那部分没放开，又还想去锁对方的那部分东西，僵持不下导致了一个死循环。
如果理解了再去研究一下你的业务逻辑
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