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PODeployed Tomcat 7 WAR application throws NoClassDefFoundError error
 

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    <p>I am working on a hello-world type of web application. I am using Eclipse Helios as my IDE, Maven 2 to handle dependencies, and a locally run Tomcat 7 server to deploy and test. The application is Spring MVC based and uses Hibernate for data management.</p> <p>I can successfully package the project into a WAR file. When I deploy the WAR in Tomcat, the following error is reported in the logs:</p> <blockquote> <p>SEVERE: Context initialization failed</p> <p>org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateSessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.hibernate.cfg.AnnotationConfiguration at</p> <p>org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409) Etc...</p> </blockquote> <p>I checked to be sure that the correct dependency is included in my POM, and it is:</p> <pre><code>&lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-annotations&lt;/artifactId&gt; &lt;version&gt;3.4.0.GA&lt;/version&gt; &lt;type&gt;jar&lt;/type&gt; &lt;optional&gt;false&lt;/optional&gt; &lt;/dependency&gt; </code></pre> <p>I checked to see that the packaged WAR file has the required JAR file which has the class mentioned (org.hibernate.cfg.AnnotationConfiguration) in the error and it does:</p> <blockquote> <p>./Tomcat 7/webapps/helloworld/WEB-INF/lib/hibernate-annotations-3.4.0.GA.jar</p> </blockquote> <p>Based on this information, I figure that this might be a classpath configuration issue. From the documentation I've read on Tomcat 7, Tomcat should be able to utilize the JAR files in "/WEB-INF/lib" folder. Any one know if I may have skipped a step in configuration of Tomcat in order for it to recognize the JAR files in the lib folder of a webapp?</p>
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    1. COThe method I use to package up the webapp is: "mvn clean package". I also tried going to the "Server" view of Eclipse and added my Tomcat 7 server. I am able to bypass the NoClassDefFoundError by doing so. I would still like to know why Tomcat 7 won't utilize the JAR files in "Tomcat 7.0/webapps/<webapp-name>/WEB-INF/lib" when I package it using "mvn clean package".
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