java - GarbageCollectionNotificationInfo 使用 Wildfly 8 导致 NoClassDefFoundError

Question

我正在尝试使用 GarbageCollectionNotificationInfo 订阅 GC 通知。通知有效，但当我尝试在 Wildfly 8.2 中使用此机制时，我收到 java.lang.NoClassDefFoundError:

java.lang.NoClassDefFoundError: com/sun/management/GarbageCollectionNotificationInfo
2017-02-06 08:40:09,156 ERROR [stderr] (Service Thread)     at com.vonage.metrics.GCNotificationListener.handleNotification(GCNotificationListener.java:28)
2017-02-06 08:40:09,156 ERROR [stderr] (Service Thread)     at  sun.management.NotificationEmitterSupport.sendNotification(NotificationEmitterSupport.java:156)
2017-02-06 08:40:09,157 ERROR [stderr] (Service Thread)     at sun.management.GarbageCollectorImpl.createGCNotification(GarbageCollectorImpl.java:147)

我发现在某些情况下你需要在 Jboss/Wildfly 中包含依赖项:https://docs.jboss.org/author/display/WFLY8/Class+Loading+in+WildFly

我需要以某种方式包含 com.sun.* 包吗？

Answer 1

我最近遇到了同样的问题，只是使用 WildFly 10.1.0.Final。

解决方案是在 jboss-deployment-struction.xml 中使用类似的内容显式包含 com.sun.management 类:

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
    <deployment>
        <dependencies>
            <system>
                <paths>
                    <path name="com/sun/management"/>
                </paths>
            </system>
        </dependencies>
    </deployment>
</jboss-deployment-structure>