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我想爲Jira寫一個新的監聽器，我遇到了一個問題，我真的很感謝一些幫助和指導。Classloader問題在Tomcat中加載庫6
背景 我們在Apache Tomcat下運行Jira 4.2.2 Enterprise WAR。這包括在的webapps/JIRA/WEB-INF/lib目錄下的jar文件：
* slf4j-api-1.5.8.jar
* slf4j-log4j12-1.5.8.jar
我們有運行作爲一個插件一個簡單的類。它接收事件並根據事件的類型做一些工作。該類使用slf4j進行日誌記錄，並按預期工作。該類打包成一個jar包並部署在webapps/jira/WEB-INF/lib下並從那裏使用。我們可以將其添加爲偵聽器，配置它並在日誌中查看init消息。所有的日誌記錄都是通過slf4j進行的並且可行
當我們試圖從第三方庫，以我們的插件添加的功能，我們收到以下異常： com.atlassian.util.concurrent.LazyReference $ InitializationException：java.lang.NoClassDefFoundError：組織/ SLF4J /的LoggerFactory
由於slf4j可用於我們稱之爲第三方庫的類，因此我不明白我做錯了什麼，或者在調用時如何使它可用。
工作情況
在我們的代碼，我們創建一個記錄如下：
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.3rdparty.login;
public class JiraSampleListener extends AbstractIssueEventListener implements IssueEventListener {
private final static Logger logger = LoggerFactory.getLogger(JiraSampleListener.class);
.
.
.
然後我們就可以通過調用
logger.warn("MESSAGE")
出現預期的消息使用我們的日誌。
錯誤的情況下
只要我們下面的代碼添加到這個類，我們收到的連接異常：
newThing = new 3rdPartyClass("name of thing");
異常
com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
任何意見上解決這個或指針，我在這裏做錯了將不勝感激d！
異常的更全面的觀點如下...
2011-01-19 05:30:51,016 main ERROR [com.atlassian.jira.ComponentManager] Error occurred
while starting component 'com.atlassian.jira.event.DefaultListenerManager'.
com.atlassian.util.concurrent.LazyReference$InitializationException: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:148)
at com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:111)
at com.atlassian.util.concurrent.ResettableLazyReference.get(ResettableLazyReference.java:89)
at com.atlassian.jira.event.DefaultListenerManager$Listeners.start(DefaultListenerManager.java:93)
at com.atlassian.jira.event.DefaultListenerManager.start(DefaultListenerManager.java:38)
at com.atlassian.jira.ComponentManager.quickStart(ComponentManager.java:256)
at com.atlassian.jira.ComponentManager.start(ComponentManager.java:212)
at com.atlassian.jira.upgrade.ConsistencyLauncher.launchConsistencyChecker(ConsistencyLauncher.java:63)
at com.atlassian.jira.upgrade.ConsistencyLauncher.contextInitialized(ConsistencyLauncher.java:42)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at 3rd.party.3rdPartyClassDefaultImpl.(3rdPartyClassDefaultImpl.java:101)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at 3rd.party.3rdParty.(3rdParty.java:107)
at 3rd.party.3rdParty.(3rdParty.java:83)
at 3rd.party.3rdParty.(3rdParty.java:67)
at my.organisationlisteners.JiraSampleListener.init(JiraSampleListener.java:36)
at com.atlassian.jira.event.ListenerFactory.getListener(ListenerFactory.java:33)
at com.atlassian.jira.event.DefaultListenerManager$Listeners.loadListeners(DefaultListenerManager.java:126)
at com.atlassian.jira.event.DefaultListenerManager$Listeners.create(DefaultListenerManager.java:71)
at com.atlassian.jira.event.DefaultListenerManager$Listeners.create(DefaultListenerManager.java:66)
at com.atlassian.util.concurrent.ResettableLazyReference$InternalReference.create(ResettableLazyReference.java:143)
at com.atlassian.util.concurrent.LazyReference$Sync.run(LazyReference.java:316)
at com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:142)
... 32 more
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 46 more
的第三方庫是在classpath，在$ {定義} CATALINA_HOME /bin/setenv.sh 如果我添加SLF4J到classpath中，那麼其他應用程序沒有的東西更長的工作。 – Anonymouslemming 2011-01-23 17:39:49