超過了鎖定等待超時； 嘗試在spring_Hibernate_Mysql中重新啟動事務

Question

我在spring應用程序中有一個要求，其中一種方法會接收並發請求，以將10000-50000行之間的任何內容批量插入表A（以及另一個具有對A的外鍵的表B）中。相同。在處理時，出現“超出鎖定等待超時”異常。進行了很多搜索，但不知道如何解決。底層數據庫是MySQL。我在下面附加了相同的代碼。請幫助。

 SessionFactory sessionFactory = hibernateTemplate.getSessionFactory();
        Session session = sessionFactory.openSession();
        Transaction transaction = null;
        try {
            transaction = session.beginTransaction();
            for (i = 0; i < 50000 , i++) {
                a = new A();
                session.save(a);
                recordCounter++;
                if ((recordCounter % 20) == 0) {
                    session.flush();
                    session.clear();
                }
                if (list != null && !list.isEmpty()) {
                    for (Object object : list) {
                        b = new B();
  //Setters
                        b.setA(a);
                        session.save(b);
                        dataCounter++;
                        if ((dataCounter % 20) == 0) {
                            session.flush();
                            session.clear();
                        }
                    }
                }
            }
            transaction.commit();
        } catch (Exception he) {
            LOGGER.error("Exception - ", he);
            transaction.rollback();
            throw he;

        } finally {
            if (session != null && session.isOpen()) {
                session.close();
            }
        }

日志：-

2013-07-02 12:41:46,932 [addVersionToFullData] ERROR   QueueHelper - Exception -
        org.hibernate.exception.GenericJDBCException: could not insert: [A]
        at    org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
        at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
        at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
        at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
        at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
        at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
        at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
        at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
        at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
        at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
        at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
        at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
        at com.manager.QueueHelper.populateSPInput(QueueHelper.java:1341)
        at com.manager.QueueHelper.addVersionToFullData(QueueHelper.java:1202)
        at com.manager.SyncServiceImpl.sendFullData(SyncServiceImpl.java:424)
        at com.controller.SynchronizationController.getFullData(SynchronizationController.java:434)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:471)
        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleRequestInternal(MultiActionController.java:408)
        at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
        Caused by: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3593)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2111)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2407)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2325)
        at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2310)
        at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:477)
        at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
        at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
        ... 49 more

Answer 1

問題：您擁有鎖定這些行的大型事務。 當出現另一個請求時，它必須等待它們被解鎖。 由於事務如此之大，因此最終要等待很長時間並超時。

解決方案：如果您確實需要整個事務都是原子性的，那么您需要增加超時之前等待的時間。 如果您願意，最好將其拆分為較小的交易。