Async servlet: HttpServletResponse.sendError() throws UT000048 if error page set -------------------------------------------------------------------------------- Key: WFLY-3460 URL: https://issues.jboss.org/browse/WFLY-3460 Project: WildFly Issue Type: Bug Security Level: Public(Everyone can see) Components: Web (Undertow) Affects Versions: 8.1.0.Final Environment: Windows 7 Professional, Java 7u55 Reporter: Darren Jones Assignee: Stuart Douglas Attachments: AsyncTest.war, AsyncTestSrc.zip If an async servlet calls sendError(...) when an <error-page> is added to the web.xml, the exception below occurs. If the <error-page> is removed (not possible for me), the servlet works just fine. Exception in thread "default task-29" java.lang.IllegalStateException: UT000048: No request is currently active at io.undertow.servlet.handlers.ServletRequestContext.requireCurrent(ServletRequestContext.java:63) at io.undertow.servlet.spec.SecurityActions.requireCurrentServletRequestContext(SecurityActions.java:86) at io.undertow.servlet.spec.RequestDispatcherImpl.error(RequestDispatcherImpl.java:324) at io.undertow.servlet.spec.RequestDispatcherImpl.error(RequestDispatcherImpl.java:311) at io.undertow.servlet.spec.HttpServletResponseImpl.sendError(HttpServletResponseImpl.java:128) at TestAsyncServlet$1.run(TestAsyncServlet.java:25) at io.undertow.servlet.spec.AsyncContextImpl$4.run(AsyncContextImpl.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)