Tomcat deploying the same application twice in netbeans

Question

I\'m using NetBeans and Tomcat seems to be deploying in .war application twice, a double launch of the web app.

I\'ve tried both Tomcat 6 and 7 and the same result.<

Answer 1

First of all, thanks Steven! Here is a more portable version of the fix:

/**
 * tomcat workaround bug, in development mode, if tomcat is stopped and application is not un-deployed,
 * the old application will start up again on startup, and then the new code will be deployed, leading
 * to a the app starting two times and introducing subtle bugs, when this app is stopped and in dev mode
 * remove the deployment descriptor from catalina base
 */
private static void preventTomcatNetbeansRedeployBug(final ServletContextEvent sce) {
    final String contextPath = sce.getServletContext().getContextPath();
    final String catalinaBase = System.getProperty("catalina.base");

    if (StringUtil.checkValidity(contextPath, catalinaBase)
            && FrameworkContext.getInstance().isDevEnvironment()) {
        final File catalinaBaseContext = new File(catalinaBase, "conf/Catalina/localhost");
        if (catalinaBaseContext.exists() && catalinaBaseContext.canRead()) {
            final File[] contexts = catalinaBaseContext.listFiles(new FilenameFilter() {
                @Override
                public boolean accept(File dir, String name) {
                    return name.equals(contextPath.substring(1) + ".xml");
                }
            });

            if (contexts != null && contexts.length > 0) {
                LOG.info("Deleting core context[" + contexts[0].getAbsolutePath() + "] since we are in dev");
                contexts[0].delete();
            }
        }
    }
}

PS: substitute unknown references for your own version of it :)

Call this custom method from the contextDestroyed method of your ServletContextListener implementation.