Connection error when joining
There are problems with joining that participants cannot join. Reproducible with many participants and listen to ping times.
Log:
Sep 25 14:17:16 kaesdingeling.de java[7254]: java.lang.NullPointerException: DataCommunicator can not refresh null object
Sep 25 14:17:16 kaesdingeling.de java[7254]: java.lang.RuntimeException: java.lang.NullPointerException: DataCommunicator can not refresh null object
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:207)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:177)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:137)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.handleNode(PublishedServerEventHandlerRpcHandler.java:125)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.AbstractRpcInvocationHandler.handle(AbstractRpcInvocationHandler.java:64)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.ServerRpcHandler.handleInvocationData(ServerRpcHandler.java:409)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.ServerRpcHandler.lambda$handleInvocations$1(ServerRpcHandler.java:390)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:390)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:317)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:89)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1545)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:247)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.spring.SpringServlet.service(SpringServlet.java:108)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at javax.servlet.http.HttpServlet.service(HttpServlet.java:584)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:251)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.dispatchToServlet(ServletInitialHandler.java:196)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImpl(RequestDispatcherImpl.java:225)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.spec.RequestDispatcherImpl.forwardImplSetup(RequestDispatcherImpl.java:149)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.spec.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.mvc.ServletForwardingController.handleRequestInternal(ServletForwardingController.java:141)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:177)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at javax.servlet.http.HttpServlet.service(HttpServlet.java:517)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at javax.servlet.http.HttpServlet.service(HttpServlet.java:584)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.websockets.jsr.JsrWebSocketFilter.doFilter(JsrWebSocketFilter.java:173)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.Connectors.executeRootHandler(Connectors.java:370)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:836)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2019)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1558)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1449)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at java.base/java.lang.Thread.run(Thread.java:834)
Sep 25 14:17:16 kaesdingeling.de java[7254]: Caused by: java.lang.NullPointerException: DataCommunicator can not refresh null object
Sep 25 14:17:16 kaesdingeling.de java[7254]: at java.base/java.util.Objects.requireNonNull(Objects.java:246)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.data.provider.DataCommunicator.refresh(DataCommunicator.java:186)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.component.grid.Grid$AbstractGridExtension.refresh(Grid.java:942)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.component.grid.Grid$DetailsManager.setDetailsVisibleFromClient(Grid.java:1082)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.component.grid.Grid$DetailsManager.access$600(Grid.java:977)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.component.grid.Grid.setDetailsVisible(Grid.java:2956)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at jdk.internal.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at java.base/java.lang.reflect.Method.invoke(Method.java:566)
Sep 25 14:17:16 kaesdingeling.de java[7254]: at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:200)
Sep 25 14:17:16 kaesdingeling.de java[7254]: ... 85 more