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POTomcat6 linkageError for javax.el.ExpressionFactory
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  1. POTomcat6 linkageError for javax.el.ExpressionFactory
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    copied!<p>I am porting an application from tomcat7, where it works fine, to tomcat6 since tomcat 7 is not yet supported by CloudBees which is a PAAS I am considering. </p> <p>I am porting to tomcat 6.035. I think the el-api.jar being in both my java-ee dependency and on tomcat is my problem, but I can't see how to solve it. The error, and a fragment of my pom.xml are below:</p> <p>POM: (these are the only 2 dependencies related to el-api, I think. I removed another, and have made the java-ee dependency scoped as "provided".</p> <pre><code> &lt;dependency&gt; &lt;groupId&gt;org.glassfish&lt;/groupId&gt; &lt;artifactId&gt;javax.faces&lt;/artifactId&gt; &lt;version&gt;2.1.11&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;javax&lt;/groupId&gt; &lt;artifactId&gt;javaee-api&lt;/artifactId&gt; &lt;version&gt;6.0&lt;/version&gt; &lt;scope&gt;provided&lt;/scope&gt; &lt;/dependency&gt; </code></pre> <p>SEVERE: Critical error during deployment: java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, com/sun/faces/config/ConfigureListener, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature at com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:695) at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:246) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:943) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:778) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:504) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065) at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) at org.apache.catalina.core.StandardService.start(StandardService.java:525) at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) at org.apache.catalina.startup.Catalina.start(Catalina.java:595) 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)</p>
 

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