[英]java.lang.LinkageError: loader constraint violation: loader (instance of org/apache/catalina/loader/WebappClassLoader)
无法启动组件[StandardEngine [Tomcat] .StandardHost [localhost] .StandardContext [/ projectname]]
引起:java.lang.LinkageError:加载器约束违规:加载器(org / apache / catalina / loader / WebappClassLoader的实例)先前为名为“javax / servlet / ServletContext”的其他类型启动加载
org.apache.catalina.LifecycleException:无法启动组件[StandardEngine [Tomcat] .StandardHost [localhost]]
在打印堆栈跟踪中,它没有给出任何ClassNotFoundException :HttpServletRequest
。
我在pom.xml
文件中添加了tomcat maven插件。 我想运行一些集成测试,所以我在集成开始之前添加了插件来运行。 这是我的插件
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8989</port>
<systemProperties>
<archaius.deployment.environment>test</archaius.deployment.environment>
</systemProperties>
<path>/${project.name}</path>
</configuration>
<executions>
<execution>
<id>tomcat-run</id>
<goals>
<goal>run</goal>
</goals>
<phase>pre-integration-test</phase>
<configuration>
<systemProperties>
<!-- We want test configuration for running integration tests. -->
<archaius.deployment.environment>test</archaius.deployment.environment>
<logback-lib.env>filesystem</logback-lib.env>
</systemProperties>
<fork>true</fork>
</configuration>
</execution>
<execution>
<id>tomcat-shutdown</id>
<goals>
<goal>shutdown</goal>
</goals>
<phase>post-integration-test</phase>
</execution>
</executions>
</plugin>
我在pom.xml
文件中添加了这个插件。
我还添加了servlet dependency
,并为提供范围provided
唯一的。
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
当我做mvn clean install
给出以下异常
SEVERE:启动期间子容器失败java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:无法在java.util启动组件[StandardEngine [Tomcat] .StandardHost [localhost] .StandardContext [/ projectpath]]。 concurrent.FutureTask.report(FutureTask.java:122),位于org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)的java.util.concurrent.FutureTask.get(FutureTask.java:192) .apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase $ StartChild.call (ContainerBase.java:1559)位于java.util的java.util.concurrent.FutureTask.run(FutureTask.java:266)的org.apache.catalina.core.ContainerBase $ StartChild.call(ContainerBase.java:1549)。 concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.ru n(Thread.java:745)引起:org.apache.catalina.LifecycleException:无法在org.apache.catalina.util.LifecycleBase启动组件[StandardEngine [Tomcat] .StandardHost [localhost] .StandardContext [/ projectpath]] .start(LifecycleBase.java:154)... 6更多引起:java.lang.LinkageError:加载器约束违规:加载器(org / apache / catalina / loader / WebappClassLoader的实例)先前为具有名称的其他类型启动加载位于java.security.ClassLoader.defineClass(ClassLoader.java:763)的java.lang.ClassLoader.defineClass1(本地方法)中的“javax / servlet / ServletContext”,位于java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)at java.net.URLClassLoader.access java.net.URLClassLoader.access(URLClassLoader.java:477 .URLClassLoader $ 1.run(URLClassLoader.java:362)位于java.net.URLClassLoader.fin的java.security.AccessController.doPrivileged(Native Method) 位于org.apache的org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1191)中的dClass(URLClassLoader.java:361)org.apache上的org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1669) .catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)位于java.lang.Class.Class.devlaredMethods上的java.lang.Class.getDeclaredMethods0(Native Method),java.lang.Class.getDeclaredMethods上的java.lang.Class.privateGetDeclaredMethods(Class.java:2701) (Class.java:1975)位于org.apache的org.apache.catalina.util.Introspection.getDeclaredMethods(Introspection.java:127)org.apache.catalina.startup.WebAnnotationSet.loadMethodsAnnotation(WebAnnotationSet.java:281)。位于org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)的catalina.startup.WebAnnotationSet.loadApplicationFilterAnnotations(WebAnnotationSet.java:113)org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java: 405)在org.apache.catalina.startup.ContextConfig.co nfigureStart(ContextConfig.java:881)位于org.apache的org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)位于org.apache.catalina.util.LifecycleBase.start的Org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)中的.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)(LifecycleBase.java) :150)......还有6个
2016年9月28日下午12:29:26 org.apache.catalina.core.ContainerBase startInternal SEVERE:启动时子容器失败java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:启动组件失败[StandardEngine [Tomcat] .StandardHost [localhost]],位于org.apache.catalina的java.util.concurrent.FutureTask.report(FutureTask.java:122)java.util.concurrent.FutureTask.get(FutureTask.java:192)。 core.ContainerBase.startInternal(ContainerBase.java:1123)org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)org.apache.catalina.core.StandardServer.startInternal (StandardServer.java:732)org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)org.apache.catalina.startup.Tomcat.start(Tomcat.j) ava:341)org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo。 java:592)org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)org.apache.maven.life.internal.MojoExecutor.execute(MojoExecutor.java:207)atg.apache.maven .lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)org.apache.maven.life.internal.MojoExecutor.execute(MojoExecutor.java:145)org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:116)org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java) :51)在org.apache的org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)。 org.apache上的org.apache.maven.maven.DefaultMaven.execute(DefaultMaven.java:106)上的org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)中的maven.DefaultMaven.doExecute(DefaultMaven.java:307) .maven.cli.MavenCli.execute(MavenCli.java:863)org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)org.apache.maven.cli.MavenCli.main(MavenCli.java) :199)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang。反映.Method.invoke(Method.java:498)org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher。 java:229)org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)引起:org .apache.cat alina.LifecycleException:无法在org.apache.catalina.core.ContainerBase $ StartChild的org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)启动组件[StandardEngine [Tomcat] .StandardHost [localhost]] .call(ContainerBase.java:1559)位于java的java.util.concurrent.FutureTask.run(FutureTask.java:266)的org.apache.catalina.core.ContainerBase $ StartChild.call(ContainerBase.java:1549)。 java.lang.ThreadPoolExecutor中的util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)java.lang.Thread.run(Thread.java:745)中的java.man.run(ThreadPoolExecutor.java:617)引起的:org.apache.catalina.LifecycleException:org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)org.apache.catalina.core.StandardHost.startInternal(StandardHost.java)启动时子容器失败:800)org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)... 6更多
我解决了这个问题,实际上javax.servlet
是由其他依赖项http-lib
和commons-util
内部调用的。
我用了
<exclusions>
<exclusion>
<artifactId>servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
</exclusions>
在两个依赖项中。 然后问题解决了
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