我有一个使用[Armeria][1]作为Web服务的Java应用程序。当我在主方法中创建Hibernate SessionFactory时，它运行正常。但是我试图在调用特定Http端点时创建SessionFactory。在处理程序方法中无法创建会话工厂。
`Exception in thread "Thread-1" org.hibernate.internal.util.config.ConfigurationException: 无法在资源hibernate.cfg.xml的行号0和列号0执行解组。消息：null`

关于这个错误，我能找到的所有信息都是JaxB在Java 8之后不再提供，但我正在使用Java 8，如果我只是在应用程序启动时创建它，它就可以正常运行。
  [1]: https://github.com/line/armeria
<details>
<summary>英文:</summary>
I have a Java Application that uses [Armeria][1] for a Web Service. When I create my Hibernate SessionFactory in the main method it works fine. But I am trying to create the SessionFactory when a certain Http Endpoint is called. In the handler method the session factory can not be created
`Exception in thread &quot;Thread-1&quot; org.hibernate.internal.util.config.ConfigurationException: Unable to perform unmarshalling at line number 0 and column 0 in RESOURCE hibernate.cfg.xml. Message: null`

All I could find about this error is that JaxB is not provided for Java > 8 but i am using Java 8 and it works fine if I just create it at Application launch.
  [1]: https://github.com/line/armeria
</details>
# 答案1
**得分**: 3
我认为这是某种类路径冲突。在Java 8中，以下代码会因为`ClassNotFoundException: com/sun/xml/bind/v2/ContextFactory`而失败，正如问题中所报告的：
```lang-java
public class MyService {
    @Get("/start")
    public HttpResponse start() throws Exception {
        final StandardServiceRegistryBuilder registryBuilder =
            new StandardServiceRegistryBuilder().configure();
        ...
    }
}

    @Get("/start")
    public HttpResponse start() throws Exception {
        Thread.currentThread().setContextClassLoader(MyService.class.getClassLoader());
        // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        final StandardServiceRegistryBuilder registryBuilder =
            new StandardServiceRegistryBuilder().configure();
        ...
    }