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POeclipse/tomcat: deploy doesn't work any more (ClassNotFoundException)
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copied!<p>I'm running Eclipse Helios Service Release 1, with Tomcat 7.0.12 in Linux Ubuntu Natty Narwhal.</p> <p>I've been happily hot re-deploying my webapp until it stopped working for apparently no reason. The following exception is displayed:</p> <pre><code>SEVERE: Allocate exception for servlet Index java.lang.ClassNotFoundException: obliquid.servlet.Index at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521) </code></pre> <ul> <li>In <em>Servers</em> tab I've "Tomcat v7.0 Server at localhost [Started,Synchronized]</li> <li>My project appears as a child of Tomcat v7.0 Server</li> <li>In Properties, Java Build Path, Source I've <em>Project/src</em> Source folder</li> <li>In Properties, Web Deployment Assembly, I've the following mappings: <em>/WebContent</em> -> <em>/</em>, <em>/src</em> -> <em>/WEB-INF/classes</em>, <em>/test</em> -> <em>/build/classes</em></li> <li>My <em>src</em> directory contains a Servlet in <em>obliquid/servlet/Index.java</em></li> <li>I tried already to click on <em>Clean Module Work Directory...</em> and <em>Publish</em></li> <li>I tried to stop and start the Server from within Eclipse Servers tab</li> </ul> <p>What else should I check? Thank you.</p> <p><strong>UPDATE</strong> Despite now I'm working with the new project, I came back to check the old one, and mysteriously now it's working. I think I won't be able to find what has happened. </p> <p>However today with the new project, I had 404 errors with no apparent reason and I found out that right clicking on the Tomcat server and selecting "Clean..." can be useful. Maybe it could have helped.</p> <p>Selecting "Clean..." says: "Clean will discard all publish state and republish from scratch. Are you sure you want to clean all published resources?". Selecting yes, I solved the problem</p> <p><strong>UPDATE 2</strong> It happened again on the new project. 404 errors, this time they don't go away.</p> <pre><code>Stop -> Clean... -> Start (404) Stop -> Clean Tomcat Work Directory... -> Start (404) Stop -> Clean Tomcat Work Directory... -> Clean... -> Start (404) Stop -> Remove on the application -> Clean... -> Run As -> Run on Server -> (404) Exit Eclipse, Start Eclipse Start the server -> (404) </code></pre> <p><strong>UPDATE 3</strong> It turned out that this time I just didn't notice an exception caused by a listener-class during startup. After solving the problem, it worked. Guess I should stop working at 3 AM.</p>

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