与Eclipse Jetty的Maven插件一样奇怪的NoClassDef-s

Question

我通过Eclipse Jetty Maven插件（9.1.0.M0）使用嵌入式Jetty。

我的pom.xml中有以下插件配置：

                <plugin>
                    <groupId>org.eclipse.jetty</groupId>
                    <artifactId>jetty-maven-plugin</artifactId>
                    <version>${version.jetty}</version>

                    <configuration>
                        <scanIntervalSeconds>10</scanIntervalSeconds>
                        <daemon>true</daemon>

                        <webApp>
                            <contextPath>/</contextPath>
                            <descriptor>${basedir}/src/test/webapp/WEB-INF/web.xml</descriptor>
                        </webApp>

                        <httpConnector>
                            <port>48080</port>
                        </httpConnector>

                        <stopPort>19081</stopPort>
                        <stopKey>53AS9DS1FD8E3WEFEW9GR1ER8G2ER0WE31</stopKey>
                    </configuration>

                    <executions>
                        <execution>
                            <id>jetty-start</id>

                            <phase>test-compile</phase>
                            <goals>
                                <goal>run</goal>
                            </goals>
                        </execution>
                        <execution>
                            <id>jetty-stop</id>

                            <phase>test</phase>
                            <goals>
                                <goal>stop</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>

当Jetty关闭时，我一直收到以下异常：

2013-09-27 04:51:08.309:WARN:oejuc.AbstractLifeCycle:Thread-68: FAILED WebSocketClient@873794597{FAILED,8<=8<=200,i=8,q=0}: java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
    at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:121)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:129)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:148)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:263)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:133)
Caused by: 
java.lang.ClassNotFoundException: org.eclipse.jetty.util.thread.QueuedThreadPool$1
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:121)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:129)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:148)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:263)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:133)
2013-09-27 04:51:08.310:WARN:oejuc.AbstractLifeCycle:Thread-68: FAILED org.eclipse.jetty.websocket.client.WebSocketClient@34150c25: java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
    at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:121)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:129)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:148)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:263)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:133)
Caused by: 
java.lang.ClassNotFoundException: org.eclipse.jetty.util.thread.QueuedThreadPool$1
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:121)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:129)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:148)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:263)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:133)
Exception in thread "Thread-68" java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/QueuedThreadPool$1
    at org.eclipse.jetty.util.thread.QueuedThreadPool.doStop(QueuedThreadPool.java:121)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.stop(ContainerLifeCycle.java:129)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop(ContainerLifeCycle.java:148)
    at org.eclipse.jetty.websocket.client.WebSocketClient.doStop(WebSocketClient.java:263)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:90)
    at org.eclipse.jetty.util.thread.ShutdownThread.run(ShutdownThread.java:133)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.util.thread.QueuedThreadPool$1
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
    ... 7 more

我尝试添加jetty-util作为插件的依赖项（并且，也是 - 项目）。这没有帮助，这让我很生气。虽然构建确实正在通过，但是当Jetty在我的Maven构建结束时关闭时，我真的无法忍受看到这些错误。

请指教！非常感谢提前！

Answer 1

我建议您使用发布版本，例如9.0.5.v20130815，而不是里程碑（现在仍在开发中），因为您现在正在使用9.1.0.M0

Answer 2

尝试将<stopWait>10</stopWait>添加到插件配置中。

完整配置：

<plugin>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>9.1.4.v20140401</version>

    <configuration>
        <stopPort>8005</stopPort>
        <stopKey>STOP</stopKey>
        <stopWait>10</stopWait>
    </configuration>

    <executions>
        <execution>
            <id>start-jetty</id>
            <phase>pre-integration-test</phase>
            <goals>
                <goal>run</goal>
            </goals>
            <configuration>
                <scanIntervalSeconds>0</scanIntervalSeconds>
                <daemon>true</daemon>
            </configuration>
        </execution>

        <execution>
            <id>stop-jetty</id>
            <phase>post-integration-test</phase>
            <goals>
                <goal>stop</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Answer 3

你不应该使用＆＃34; run＆＃34;目标与执行绑定。相反，你应该使用＆＃34; start＆＃34;目标。请参阅此处的文档：http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html#jetty-start-goal

区别在于＆＃34;运行＆＃34;目标将进行新的构建，直到＆＃34; test-compile＆＃34;相。 ＆＃34;开始＆＃34;目标不会调用并行构建，只是在它绑定的任何阶段运行。

扬

Answer 4

在“验证”阶段运行集成测试时，我遇到了与maven-jetty-plugin版本8.1.14.v20131031相同的问题。

需要两个依赖项（请注意maven-jetty-plugin中的确切版本）：

    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-jsp</artifactId>
        <version>8.1.14.v20131031</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-util</artifactId>
        <version>8.1.14.v20131031</version>
    </dependency>

最后我使用了这个maven-jetty-plugin配置：

<plugin>
<!-- jetty-maven-plugin must be outside pluginManagement, otherwise it does not run properly during 'verify' -->
    <groupId>org.mortbay.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>8.1.14.v20131031</version>
    <configuration>
        <stopPort>9966</stopPort>
        <stopKey>PARENT</stopKey>
    </configuration>
    <executions>
        <execution>
            <id>start-jetty</id>
            <phase>pre-integration-test</phase>
            <goals>
                <goal>run</goal>
            </goals>
            <configuration>
                <scanIntervalSeconds>0</scanIntervalSeconds>
                <daemon>true</daemon>
            </configuration>
        </execution>
        <execution>
            <id>stop-jetty</id>
            <phase>post-integration-test</phase>
            <goals>
                <goal>stop</goal>
            </goals>
        </execution>
    </executions>
</plugin>

在实际的“jetty-maven-plugin：8.1.14.v20131031：stop（stop-jetty）”阶段，插件本身报告了一些错误（即关于缺少stopPort＆amp; stopKey的投诉），这些错误导致

  

java.lang.ClassNotFoundException：org.eclipse.jetty.util.thread.QueuedThreadPool $ 1

Answer 5

在找到这个答案之前，我不得不为此付出很多努力：https://stackoverflow.com/a/22856563/529286。基本上，它的工作方式就像Risto Oikarinen所说的那样，增加了： - 最近的Jetty版本（9.1.x），你不需要任何进一步的Jetty依赖 - 使用＆＃39; stop＆＃39; “整合后测试”附带的目标＆＃39;阶段，你需要调用＆＃39;验证＆＃39;或者＆＃39;安装＆＃39; （或后来的目标），以便让Jetty正确停止。

Answer 6

我解决了它在文档中添加配置： http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html#jetty-stop-goal

       <plugin>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>9.1.4.v20140401</version>
            <configuration>
                <contextPath>/</contextPath>
                <scanIntervalSeconds>0</scanIntervalSeconds>
                <stopPort>9966</stopPort>
                <stopKey>foo</stopKey>
                <stopWait>10</stopWait>
            </configuration>
            <executions>
                <execution>
                    <id>start-jetty</id>
                    <phase>pre-integration-test</phase>
                    <goals>
                        <goal>run</goal>
                    </goals>
                    <configuration>
                        <daemon>true</daemon>
                    </configuration>
                </execution>
                <execution>
                    <id>stop-jetty</id>
                    <phase>post-integration-test</phase>
                    <goals>
                        <goal>stop</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>