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    <p>I've had the same issue, and as Jeff says, the "don't worry about it approach" was not the way to go.</p> <p>I did a ServletContextListener that stops the hung thread when the context is being closed, and then registered such ContextListener on the web.xml file.</p> <p>I already know that stopping a thread is not an elegant way to deal with them, but otherwise the server keeps on crashing after two or three deploys (it is not always possible to restart the app server).</p> <p>The class I created is:</p> <pre><code>public class ContextFinalizer implements ServletContextListener { private static final Logger LOGGER = LoggerFactory.getLogger(ContextFinalizer.class); @Override public void contextInitialized(ServletContextEvent sce) { } @Override public void contextDestroyed(ServletContextEvent sce) { Enumeration&lt;Driver&gt; drivers = DriverManager.getDrivers(); Driver d = null; while(drivers.hasMoreElements()) { try { d = drivers.nextElement(); DriverManager.deregisterDriver(d); LOGGER.warn(String.format("Driver %s deregistered", d)); } catch (SQLException ex) { LOGGER.warn(String.format("Error deregistering driver %s", d), ex); } } Set&lt;Thread&gt; threadSet = Thread.getAllStackTraces().keySet(); Thread[] threadArray = threadSet.toArray(new Thread[threadSet.size()]); for(Thread t:threadArray) { if(t.getName().contains("Abandoned connection cleanup thread")) { synchronized(t) { t.stop(); //don't complain, it works } } } } } </code></pre> <p>After creating the class, then register it on the web.xml file:</p> <pre><code>&lt;web-app... &lt;listener&gt; &lt;listener-class&gt;path.to.ContextFinalizer&lt;/listener-class&gt; &lt;/listener&gt; &lt;/web-app&gt; </code></pre>
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