Martin,
thank you. But I don't have servlet.jar in the lib folder. There's no
lib folder, since I am using maven archetype.
If I have to exclude it from POM.XML then how ?
tomcat plugin depends on it !

can you please kindly give me more details ?

On Sun, Jul 18, 2010 at 11:16 AM, Martin Grigorov
<martin.grigo...@gmail.com> wrote:
> Remove servlet.jar from yourApplication.war#WEB-INF/lib/ folder
>
>
> 2010/7/18 Mansour Al Akeel <mansour.alak...@gmail.com>
>
>> Hello all:
>> I am trying to run tomcat from maven and including openEJB. The
>> command I am using to run tomcat:
>>
>> mvn tomcat:run
>>
>> The error I am getting :
>>
>> Jul 18, 2010 6:53:29 AM org.apache.catalina.startup.Embedded start
>> INFO: Starting tomcat server
>> Jul 18, 2010 6:53:29 AM org.apache.catalina.core.StandardEngine start
>> INFO: Starting Servlet Engine: Apache Tomcat/6.0.26
>> Jul 18, 2010 6:53:30 AM org.apache.catalina.core.StandardContext
>> filterStart
>> SEVERE: Exception starting filter wicket.site
>> java.lang.ClassCastException:
>> org.apache.wicket.protocol.http.WicketFilter cannot be cast to
>> javax.servlet.Filter
>>        at
>> org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275)
>>        at
>> org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
>>        at
>> org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
>>        at
>> org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)
>>        at
>> org.apache.catalina.core.StandardContext.start(StandardContext.java:4488)
>>        at
>> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
>>        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.startup.Embedded.start(Embedded.java:825)
>>        at
>> org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:533)
>>        at
>> org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:239)
>>        at
>> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
>>        at
>> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
>>        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
>>        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
>>        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
>>        at
>> org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
>>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>        at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>>        at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>        at java.lang.reflect.Method.invoke(Method.java:616)
>>        at
>> org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
>>        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
>>        at
>> org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
>>        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
>> Jul 18, 2010 6:53:30 AM org.apache.catalina.core.StandardContext start
>> SEVERE: Error filterStart
>>
>> So I created a webapp project from maven archetype, and added openEjb
>> dependency:
>>
>>                <dependency>
>>                        <groupId>org.apache.openejb</groupId>
>>                        <artifactId>openejb-core</artifactId>
>>                        <version>3.1.2</version>
>>                </dependency>
>>
>> The error I am getting now is:
>>
>> Jul 18, 2010 7:02:37 AM org.apache.catalina.core.StandardWrapperValve
>> invoke
>> SEVERE: Servlet.service() for servlet jsp threw exception
>> java.lang.LinkageError: loader constraint violation: loader (instance
>> of org/apache/jasper/servlet/JasperLoader) previously initiated
>> loading for a different type with name
>> "javax/servlet/http/HttpServletRequest"
>>        at java.lang.Class.getDeclaredMethods0(Native Method)
>>        at java.lang.Class.privateGetDeclaredMethods(Class.java:2444)
>>        at java.lang.Class.getDeclaredMethods(Class.java:1808)
>>        at
>> org.apache.catalina.util.DefaultAnnotationProcessor.processAnnotations(DefaultAnnotationProcessor.java:226)
>>        at
>> org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:148)
>>        at
>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
>>        at
>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
>>        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
>>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>>        at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>>        at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>        at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>>        at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>>        at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>>        at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>>        at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>        at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>>        at
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
>>        at
>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
>>        at
>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>>        at java.lang.Thread.run(Thread.java:636)
>>
>> Any advice ?
>> Thank you.
>>
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