Re: Cargo Maven2 plugin: failure to deploy in Tomcat6x

> Hello guys,
>
> I am using the cargo maven2 plugin to deploy a WAR in tomcat6x
> (6.0.18). I am getting the following error (it seems that there is a
> collission with the class loader), but I do not understand well why
> and how to fix it.
>
> java.lang.LinkageError: loader constraint violation: loader (instance
> of org/apache/catalina/loader/WebappClassLoader) previously initiated
> loading for a different type with name "javax/servlet/ServletContext"
>
> I think it might be related to the fact that I have some dependencies
> on Tomact (catalina), however the scope is set as "provided" in my
> pom.xml. Also, from javax.servlet I have the following dependencies:
> jstl (runtime), servlet-api (provided) and jsp-api (provided). Any
> ideas on how can I get this working??

> Note: Cargo+Tomcat6x works fine when I use it to deploy a more
> simple/empty WAR (basic maven project, basic pom). If I use the
> default Jetty container, then I can succesfully see the site but some
> pages won't work well due to the dependencies on Tomcat6.
>
> Configuration in my pom.xml
> =====================
>       <plugin>
>         <groupId>org.codehaus.cargo</groupId>
>         <artifactId>cargo-maven2-plugin</artifactId>
>         <version>1.0</version>
>         <configuration>
>          
>           <container>
>             <containerId>tomcat6x</containerId>
>            
>             <zipUrlInstaller>
>
> <url>http://www.apache.org/dist/tomcat/tomcat-6/v6.0.18/bin/apache-tomcat-6.0.18.zip</url>
>
> <installDir>${project.build.directory}/cargoinstalls</installDir>
>             </zipUrlInstaller>
>             <log>${project.build.directory}/tomcat6x/cargo.log</log>
>           </container>
>          
>           <configuration>
>             <home>${project.build.directory}/tomcat6x/config</home>
>           </configuration>
>           <wait>true</wait>
>         </configuration>
>         <executions>
>           <execution>
>             <id>start-container</id>
>             <phase>pre-integration-test</phase>
>             <goals>
>               <goal>start</goal>
>             </goals>
>           </execution>
>           <execution>
>             <id>stop-container</id>
>             <phase>post-integration-test</phase>
>             <goals>
>               <goal>stop</goal>
>             </goals>
>           </execution>
>         </executions>
>       </plugin>
>
>
> Relevant logs
> ==========
>
> [17:45:34.718][warn][talledLocalContainer] SEVERE: Exception sending
> context initialized event to listener instance of class
> org.springframework.web.context.ContextLoaderListener
> [17:45:34.718][warn][talledLocalContainer] java.lang.LinkageError:
> loader constraint violation: loader (instance of
> org/apache/catalina/loader/WebappClassLoader) previously initiated
> loading for a different type with name "javax/servlet/ServletContext"
> [17:45:34.718][warn][talledLocalContainer]  at
> java.lang.ClassLoader.defineClass1(Native Method)
> [17:45:34.719][warn][talledLocalContainer]  at
> java.lang.ClassLoader.defineClass(ClassLoader.java:621)
> [17:45:34.719][warn][talledLocalContainer]  at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1847)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:890)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1354)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
> [17:45:34.719][warn][talledLocalContainer]  at
> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:181)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardService.start(StandardService.java:516)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
> [17:45:34.719][warn][talledLocalContainer]  at
> org.apache.catalina.startup.Catalina.start(Catalina.java:578)
> [17:45:34.720][warn][talledLocalContainer]  at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> [17:45:34.720][warn][talledLocalContainer]  at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> [17:45:34.720][warn][talledLocalContainer]  at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> [17:45:34.720][warn][talledLocalContainer]  at
> java.lang.reflect.Method.invoke(Method.java:597)
> [17:45:34.720][warn][talledLocalContainer]  at
> org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
> [17:45:34.720][warn][talledLocalContainer]  at
> org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
>
> Thanks,
> Greko
>
>