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    <p>You should not catch and suppress it, but just let it go.</p> <p>I.e. do not do:</p> <pre><code>@Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { doSomethingWhichMayThrowException(); } catch (IllegalArgumentException e) { e.printStackTrace(); // Or something else which totally suppresses the exception. } } </code></pre> <p>But rather just let it go:</p> <pre><code>@Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doSomethingWhichMayThrowException(); } </code></pre> <p>Or, if you actually intented to catch it for logging or so (I'd rather use a filter for that, but ala), then rethrow it:</p> <pre><code>@Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { doSomethingWhichMayThrowException(); } catch (IllegalArgumentException e) { e.printStackTrace(); throw e; } } </code></pre> <p>Or, if it's not an runtime exception, then rethrow it wrapped in <code>ServletException</code>, it will be automatically unwrapped by the container:</p> <pre><code>@Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { doSomethingWhichMayThrowException(); } catch (NotARuntimeException e) { throw new ServletException(e); } } </code></pre> <h3>See also:</h3> <ul> <li><a href="https://stackoverflow.com/questions/5299169/how-does-tomcat-prioritize-which-type-of-error-page-to-use/">How does server prioritize which type of web.xml error page to use?</a></li> <li><a href="https://stackoverflow.com/questions/9739472/what-to-do-with-exceptions-why-and-when-does-doget-method-throw-servletexcept/9746657#9746657">https://stackoverflow.com/questions/9739472/what-to-do-with-exceptions-why-and-when-does-doget-method-throw-servletexcept/9746657#9746657</a></li> </ul>
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    1. COAfter I mapped a servlet for exception handling in web.xml and I want to prevent to print the socket excpetion stackTrace on Jboss console. wrote in do post of mapped servlet like ` Object attribute = req.getAttribute("javax.servlet.error.exception"); if(attribute instanceof SocketException){` ,Still the stackTrace printing on the jboss and then this servlet triggering.Please help me.
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