播放2.5-@Transactional readOnly是否被忽略？

我有一个Java Play 2.5应用程序，并且有一个标记为只读的事务（在控制器级别）：

```js

@Transactional(readOnly = true) public Result list() { ...

（这是play.db.jpa.Transactional批注）。

因此，如果我为休眠事务打开日志记录：
```js
<logger name="org.hibernate.engine.transaction" level="TRACE"/>

然后，我看到事务正在完成并被提交。

019-12-03 23:42:23,754 [debug] from org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformInitiator in main - No JtaPlatform was specified, checking resolver
2019-12-03 23:42:23,755 [debug] from org.hibernate.engine.transaction.jta.platform.internal.JtaPlatformResolverInitiator in main - No JtaPlatformResolver was specified, using default [org.hibernate.engine.transaction.jta.platform.internal.StandardJtaPlatformResolver]
2019-12-03 23:42:23,766 [debug] from org.hibernate.engine.transaction.jta.platform.internal.StandardJtaPlatformResolver in main - Could not resolve JtaPlatform, using default [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2019-12-03 23:58:46,769 [debug] from org.hibernate.engine.transaction.internal.TransactionImpl in application-akka.actor.default-dispatcher-5 - begin
2019-12-03 23:58:46,878 [error] from application in application-akka.actor.default-dispatcher-5 - Transaction: org.hibernate.engine.transaction.internal.TransactionImpl@3d505ddd[transactionCoordinator=org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl@89a1241,exceptionConverter=org.hibernate.internal.ExceptionConverterImpl@76f0443c,transactionDriverControl=org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl@49f1518a]
2019-12-03 23:59:27,638 [debug] from org.hibernate.engine.transaction.internal.TransactionImpl in application-akka.actor.default-dispatcher-5 - committing

但是，我有一个问题-它不是只读的！我添加了一些修改对象的代码（obj.setField（“ changed value”）），并在事务结束时将其保存到数据库中！

我期待有一个异常告诉我该事务是只读的，并且无法提交！

为什么交易不是只读的？ 我能否以某种方式在日志中看到Hibernate是否以只读方式创建事务？ 其他信息：Java Play 2.5.10，Hibernate 5（5.2.6）和PostgreSQL作为数据库。