logback的shutdownHook是否取消注册jmxConfigurator

Question

我在logback中使用<jmxConfigurator/>元素; jmxConfigurator声明如下：

Thus, unless your application is a standalone Java application, you **MUST** unregister the JMXConfigurator instance from the JVM's Mbeans server.

logback文档还提到了<shutdownHook/>配置元素，根据文档执行以下操作：

Installing a JVM shutdown hook is a convenient way for shutting down logback and releasing associated resources.

包含<shutdownHook/>元素是否需要取消注册<jmxConfigurator/>？

Answer 1

是的，确实如此。以下是调试器的证明：

但是，有一些限制：

1. <shutdownHook/>仅适用于版本1.1.3
2. 虽然普通<shutdownHook/> the documentation says已足够，但您必须指定class属性： <shutdownHook class="ch.qos.logback.core.hook.DelayingShutdownHook"/> 否则后退抱怨：

   ERROR in ch.qos.logback.core.joran.action.ShutdownHookAction - Missing class name for shutdown hook. Near [shutdownHook] line 16
   

要确保JMXConfigurator停止，请在logback配置上启用调试模式：

<configuration debug="true">
   ...
</configuration>

然后在日志结束时，您会看到：

INFO in ch.qos.logback.core.hook.DelayingShutdownHook@1a246fc6 - Logback context being closed via shutdown hook
INFO in ch.qos.logback.classic.jmx.JMXConfigurator(default) - onReset() method called JMXActivator [ch.qos.logback.classic:Name=default,Type=ch.qos.logback.classic.jmx.JMXConfigurator]