UCAExc 3.0.7 无效事务状态：只读 SQL-事务 有时保存到 .accdb 时
UCAExc 3.0.7 invalid transaction state: read-only SQL-transaction Sometimes when saving to .accdb
我正在开发一个 spring 引导应用程序，它使用 ucanaccess 3.0.7 连接到 Microsoft Access 2010 数据库。我从数据库中读取没有问题，但是我在尝试保存到数据库时偶尔会看到这个 'invalid transaction state: read-only SQL-transaction' 错误。
我可以通过在关闭 .accdb 文件的情况下导航到我的网页来重现此错误；然后当我尝试保存到数据库时，我将收到错误。如果我打开 .accdb 文件并再次尝试保存，它将起作用。
接下来，如果我在打开 .accdb 文件的情况下重新加载网页并尝试保存到数据库；我将再次收到只读错误。如果我关闭 .accdb 文件并再次尝试保存，它将起作用。
不确定这里可能是什么问题，希望有人能帮助我。
错误：
WARN 8360 --- [io-8080-exec-10] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: -3706, SQLState: 25006
ERROR 8360 --- [io-8080-exec-10] o.h.engine.jdbc.spi.SqlExceptionHelper : UCAExc:::3.0.7 invalid transaction state: read-only SQL-transaction
ERROR 8360 --- [io-8080-exec-10] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not prepare statement; nested exception is org.hibernate.exception.GenericJDBCException: could not prepare statement] with root cause
org.hsqldb.HsqlException: invalid transaction state: read-only SQL-transaction
at org.hsqldb.error.Error.error(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.error.Error.error(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.checkReadWrite(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementDMQL.checkAccessRights(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementDML.<init>(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserDML.compileUpdateStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserCommand.compilePart(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserCommand.compileStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.compileStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementManager.compile(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.execute(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at net.ucanaccess.jdbc.UcanaccessConnection.prepareStatement(UcanaccessConnection.java:524) ~[ucanaccess-3.0.7.jar:3.0.7]
at sun.reflect.GeneratedMethodAccessor73.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-8.5.6.jar:na]
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-8.5.6.jar:na]
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-8.5.6.jar:na]
at com.sun.proxy.$Proxy84.prepareStatement(Unknown Source) ~[na:na]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.doPrepare(StatementPreparerImpl.java:87) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareStatement(StatementPreparerImpl.java:78) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.buildBatchStatement(AbstractBatchImpl.java:136) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.getBatchStatement(AbstractBatchImpl.java:125) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3025) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2961) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3341) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:145) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access0(JdbcResourceLocalTransactionCoordinatorImpl.java:38) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:61) ~[hibernate-entitymanager-5.0.11.Final.jar:5.0.11.Final]
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:504) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:292) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133) ~[spring-data-jpa-1.10.5.RELEASE.jar:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy112.save(Unknown Source) ~[na:na]
编辑
经过进一步测试，Hibernate 似乎在第一次 read 事务完成后锁定了我的数据库。
我的控制器
@RequestMapping("/")
public String index(Model model) {
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
return "index";
}
修改控制器以测试保存到数据库（收到只读错误）
在 findAll() 之后保存实体
@RequestMapping("/")
public String index(Model model) {
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
return "index";
}
修改控制器测试保存到数据库（第一次保存成功，之后失败）
在 findAll() 之前保存实体
@RequestMapping("/")
public String index(Model model) {
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
return "index";
}
修改控制器测试保存到数据库（每次都保存成功）
只是节省;不调用 findAll()
@RequestMapping("/")
public String index(Model model) {
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
return "index";
}
非常感谢 Gord Thompson 帮助我解决了这个问题。他最终将我指向 this SO answer，这解决了我的问题。
解决方案
当我执行第一次读取时，Hibernate 正在锁定我的数据库，因此解决方案是将 @Transactional(isolation = Isolation.READ_UNCOMMITTED) 添加到我的存储库，现在一切正常。
我正在开发一个 spring 引导应用程序，它使用 ucanaccess 3.0.7 连接到 Microsoft Access 2010 数据库。我从数据库中读取没有问题，但是我在尝试保存到数据库时偶尔会看到这个 'invalid transaction state: read-only SQL-transaction' 错误。
我可以通过在关闭 .accdb 文件的情况下导航到我的网页来重现此错误；然后当我尝试保存到数据库时，我将收到错误。如果我打开 .accdb 文件并再次尝试保存，它将起作用。
接下来，如果我在打开 .accdb 文件的情况下重新加载网页并尝试保存到数据库；我将再次收到只读错误。如果我关闭 .accdb 文件并再次尝试保存，它将起作用。
不确定这里可能是什么问题，希望有人能帮助我。
错误：
WARN 8360 --- [io-8080-exec-10] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: -3706, SQLState: 25006
ERROR 8360 --- [io-8080-exec-10] o.h.engine.jdbc.spi.SqlExceptionHelper : UCAExc:::3.0.7 invalid transaction state: read-only SQL-transaction
ERROR 8360 --- [io-8080-exec-10] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not prepare statement; nested exception is org.hibernate.exception.GenericJDBCException: could not prepare statement] with root cause
org.hsqldb.HsqlException: invalid transaction state: read-only SQL-transaction
at org.hsqldb.error.Error.error(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.error.Error.error(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.checkReadWrite(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementDMQL.checkAccessRights(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementDML.<init>(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserDML.compileUpdateStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserCommand.compilePart(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.ParserCommand.compileStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.compileStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.StatementManager.compile(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.Session.execute(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source) ~[hsqldb-2.3.3.jar:2.3.3]
at net.ucanaccess.jdbc.UcanaccessConnection.prepareStatement(UcanaccessConnection.java:524) ~[ucanaccess-3.0.7.jar:3.0.7]
at sun.reflect.GeneratedMethodAccessor73.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-8.5.6.jar:na]
at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-8.5.6.jar:na]
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-8.5.6.jar:na]
at com.sun.proxy.$Proxy84.prepareStatement(Unknown Source) ~[na:na]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.doPrepare(StatementPreparerImpl.java:87) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareStatement(StatementPreparerImpl.java:78) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.buildBatchStatement(AbstractBatchImpl.java:136) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.getBatchStatement(AbstractBatchImpl.java:125) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3025) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2961) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:3341) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:145) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1282) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:465) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:2963) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2339) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:485) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:147) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access0(JdbcResourceLocalTransactionCoordinatorImpl.java:38) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:231) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:65) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
at org.hibernate.jpa.internal.TransactionImpl.commit(TransactionImpl.java:61) ~[hibernate-entitymanager-5.0.11.Final.jar:5.0.11.Final]
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:504) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:292) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133) ~[spring-data-jpa-1.10.5.RELEASE.jar:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.sun.proxy.$Proxy112.save(Unknown Source) ~[na:na]
编辑
经过进一步测试，Hibernate 似乎在第一次 read 事务完成后锁定了我的数据库。
我的控制器
@RequestMapping("/")
public String index(Model model) {
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
return "index";
}
修改控制器以测试保存到数据库（收到只读错误）
在 findAll() 之后保存实体
@RequestMapping("/")
public String index(Model model) {
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
return "index";
}
修改控制器测试保存到数据库（第一次保存成功，之后失败）
在 findAll() 之前保存实体
@RequestMapping("/")
public String index(Model model) {
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
List<SystemLuEntity> systems = systemLuRepository.findAll();
List<ControlLuEntity> entities = controlLuRepository.findAll();
model.addAttribute("items", entities);
model.addAttribute("systems", systems);
return "index";
}
修改控制器测试保存到数据库（每次都保存成功）
只是节省;不调用 findAll()
@RequestMapping("/")
public String index(Model model) {
ControlStatusEntity entity = new ControlStatusEntity();
Random random = new Random();
entity.setId(25);
entity.setComment(String.valueOf(random.nextInt()));
controlStatusRepository.save(entity);
return "index";
}
非常感谢 Gord Thompson 帮助我解决了这个问题。他最终将我指向 this SO answer，这解决了我的问题。
解决方案
当我执行第一次读取时，Hibernate 正在锁定我的数据库，因此解决方案是将 @Transactional(isolation = Isolation.READ_UNCOMMITTED) 添加到我的存储库，现在一切正常。