Hello This is strange, because the error is caused by org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer, and not by your listener...
Also Pax Web has integration tests that use websockets with Jetty and this scenario was verified. Please create a GitHub issue - it'd be great checking some reproducer. kind regards Grzegorz Grzybek czw., 29 sty 2026 o 15:54 'Richard Hierlmeier' via OPS4J < [email protected]> napisał(a): > > Is it possible to defined a ServletContextListener with HTTP whiteboard? > > I defined this service: > > @Component(service = ServletContextListener.class) > @HttpWhiteboardListener > @HttpWhiteboardContextSelect("osgi.http.whiteboard.context.path=/app)") > public class MyServletContextListener implements ServletContextListener > { > } > > Jetty (pax-web 8.0.33) logs this exception: > > 2026-01-29T15:41:50,090 | ERROR | paxweb-config-1-thread-1 | > JettyServerWrapper | 77 - org.ops4j.pax.web.pax-web-jetty - > 8.0.33 | Section 4.4.3 of the Servlets specification allows > ServletContextListeners to be added only by ServletContainerInitializers, > declared in web.xml or web-fragment.xml or by discovery of @WebListener > annotated classes > java.lang.UnsupportedOperationException: Section 4.4.3 of the Servlets > specification allows ServletContextListeners to be added only by > ServletContainerInitializers, declared in web.xml or web-fragment.xml or by > discovery of @WebListener annotated classes > at > org.ops4j.pax.web.service.spi.servlet.DynamicRegistrations.register(DynamicRegistrations.java:322) > ~[?:?] > at > org.ops4j.pax.web.service.spi.servlet.DynamicRegistrations.addListener(DynamicRegistrations.java:293) > ~[?:?] > at > org.ops4j.pax.web.service.spi.servlet.OsgiDynamicServletContext.addListener(OsgiDynamicServletContext.java:139) > ~[?:?] > at > org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer.onStartup(WebSocketServerContainerInitializer.java:278) > ~[?:?] > at > org.ops4j.pax.web.service.spi.servlet.SCIWrapper.onStartup(SCIWrapper.java:43) > ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.PaxWebServletContextHandler.lambda$startContext$1(PaxWebServletContextHandler.java:258) > ~[?:?] > at java.lang.Iterable.forEach(Iterable.java:75) ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.PaxWebServletContextHandler.startContext(PaxWebServletContextHandler.java:252) > ~[?:?] > at > org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:916) > ~[?:?] > at > org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288) > ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.PaxWebServletContextHandler.doStart(PaxWebServletContextHandler.java:308) > ~[?:?] > at > org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73) > ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.JettyServerWrapper.ensureServletContextStarted(JettyServerWrapper.java:2436) > ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.JettyServerWrapper.lambda$visitWebSocketModelChange$20(JettyServerWrapper.java:1929) > ~[?:?] > at java.util.ArrayList.forEach(ArrayList.java:1596) ~[?:?] > at > java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1116) > ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.JettyServerWrapper.visitWebSocketModelChange(JettyServerWrapper.java:1914) > ~[?:?] > at > org.ops4j.pax.web.service.spi.task.WebSocketModelChange.accept(WebSocketModelChange.java:90) > ~[?:?] > at org.ops4j.pax.web.service.spi.task.Batch.accept(Batch.java:430) ~[?:?] > at > org.ops4j.pax.web.service.jetty.internal.JettyServerController.sendBatch(JettyServerController.java:169) > ~[?:?] > at > org.ops4j.pax.web.service.internal.HttpServiceEnabled.lambda$doRegisterWebSocket$20(HttpServiceEnabled.java:1968) > ~[?:?] > at > org.ops4j.pax.web.service.spi.model.ServerModel.lambda$run$2(ServerModel.java:541) > ~[?:?] > at > java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) > ~[?:?] > at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) > ~[?:?] > at java.util.concurrent.FutureTask.run(FutureTask.java:317) ~[?:?] > at > java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) > ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) > ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) > ~[?:?] > at java.lang.Thread.run(Thread.java:1583) [?:?] > > -- > -- > ------------------ > OPS4J - 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