java.lang.illegalstateexception: closed

java.lang.illegalstateexception: closed 是Java中的一个异常，表示尝试访问已关闭的对象或资源。这通常发生在尝试使用已关闭的流或数据库连接时。要解决此问题，您需要确保在使用对象或资源之前，它们已正确打开并且在使用后已正确关闭。如果您正在使用try-with-resources语句，则可以确保资源在使用后自动关闭。

相关问题

java.lang.IllegalStateException: closed

java.lang.IllegalStateException: closed是一个常见的异常，通常在使用流或者网络请求时出现。它的原因是流已经关闭，所以无法再进行操作。在使用OkHttp3进行网络请求时，如果多次调用response.body().string()方法，就会出现这个异常。解决方法是将response.body().string()的结果保存到一个变量中，然后对这个变量进行操作。另外，在使用Spring框架时，如果ApplicationContext没有初始化或者已经关闭，也会出现这个异常。解决方法是在访问ApplicationContext之前调用refresh()方法。

java.lang.IllegalStateException: transport client is closed

This exception is thrown when an operation is attempted on a closed transport client. In other words, the transport client has already been shut down and is no longer available for use.

To resolve this issue, you need to ensure that the transport client is opened before performing any operations on it. Additionally, you should make sure that the transport client is properly closed when it is no longer needed.

Here are some steps you can take to resolve this issue:

1. Check that the transport client is properly initialized before use. You can do this by calling the `isOpen()` method on the transport client.

2. If the transport client is not open, call the `open()` method to initialize it.

3. Make sure that the transport client is properly closed when it is no longer needed. You can do this by calling the `close()` method on the transport client.

4. If you are using multiple threads, ensure that the transport client is synchronized properly to prevent concurrent access.

By following these steps, you should be able to resolve the "transport client is closed" exception and use the transport client without any issues.