I do not know why but unfortunately I have sometimes the following Exception in the logfile. Does anyone know what it the reason (something like a closed connection…) respectively I can fix it? In the browser no error occured…
Thanks in advance,
Thomas
2017-02-14 14:26:56,339 WARN | Atmosphere-Shared-AsyncOp-189 | org.atmosphere.cpr.AtmosphereResourceImpl | Exception during suspend() operation java.lang.NullPointerException
2017-02-14 14:26:56,339 ERROR | Atmosphere-Shared-AsyncOp-189 | com.vaadin.server.communication.PushAtmosphereHandler | Exception in push connection
java.lang.NullPointerException: null
2017-02-14 14:26:56,339 WARN | Atmosphere-Shared-AsyncOp-189 | org.atmosphere.cpr.AtmosphereResourceImpl | Listener error {}
java.lang.NullPointerException: null
2017-02-14 14:26:56,339 ERROR | Atmosphere-Shared-AsyncOp-189 | com.vaadin.server.communication.PushAtmosphereHandler | Exception in push connection
org.apache.catalina.connector.ClientAbortException: java.io.IOException: Eine vorhandene Verbindung wurde vom Remotehost geschlossen
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:340)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:303)
at org.apache.catalina.connector.Response.flushBuffer(Response.java:541)
at org.apache.catalina.connector.ResponseFacade.flushBuffer(ResponseFacade.java:312)
at javax.servlet.ServletResponseWrapper.flushBuffer(ServletResponseWrapper.java:215)
at org.atmosphere.cpr.AtmosphereResponse.flushBuffer(AtmosphereResponse.java:485)
at org.atmosphere.cpr.AtmosphereInterceptorWriter.flush(AtmosphereInterceptorWriter.java:102)
at org.atmosphere.cpr.AtmosphereResponse$2.flush(AtmosphereResponse.java:589)
at org.atmosphere.handler.AbstractReflectorAtmosphereHandler.onStateChange(AbstractReflectorAtmosphereHandler.java:149)
at com.vaadin.server.communication.PushAtmosphereHandler.onStateChange(PushAtmosphereHandler.java:52)
at org.atmosphere.cpr.DefaultBroadcaster.invokeOnStateChange(DefaultBroadcaster.java:1096)
at org.atmosphere.cpr.DefaultBroadcaster.prepareInvokeOnStateChange(DefaultBroadcaster.java:1116)
at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:921)
at org.atmosphere.cpr.DefaultBroadcaster$3.run(DefaultBroadcaster.java:522)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Eine vorhandene Verbindung wurde vom Remotehost geschlossen
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(Unknown Source)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(Unknown Source)
at sun.nio.ch.IOUtil.write(Unknown Source)
at sun.nio.ch.SocketChannelImpl.write(Unknown Source)
at org.apache.tomcat.util.net.SecureNioChannel.flush(SecureNioChannel.java:143)
at org.apache.tomcat.util.net.SecureNioChannel.write(SecureNioChannel.java:646)
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1221)
at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:451)
at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:441)
at org.apache.coyote.http11.Http11OutputBuffer.flushBuffer(Http11OutputBuffer.java:514)
at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:243)
at org.apache.coyote.http11.Http11Processor.flush(Http11Processor.java:1495)
at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:284)
at org.apache.coyote.Response.action(Response.java:167)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:336)
… 18 common frames omitted
If this exception happens due closing of the browser by the user it is harmless. The reason it has been logged is that the server cannot know now whether the application in browser has crashed or it has been just closed. Also it may be possible that the communication pipeline between server and browser has been disconnected for some reason.
I think this Exception is the same cause and can also be ignored? But it would be great to have this error not in the logfile
2017-02-15 14:36:13,540 WARN | Atmosphere-Shared-AsyncOp-43 | org.atmosphere.cpr.AtmosphereResourceImpl | Exception during suspend() operation java.lang.NullPointerException
2017-02-15 14:36:13,540 ERROR | Atmosphere-Shared-AsyncOp-43 | com.vaadin.server.communication.PushAtmosphereHandler | Exception in push connection
java.lang.NullPointerException: null
at org.apache.catalina.connector.Request.getServletContext(Request.java:1627)
at org.apache.catalina.connector.Request.getContextPath(Request.java:1984)
at org.apache.catalina.connector.RequestFacade.getContextPath(RequestFacade.java:784)
at javax.servlet.http.HttpServletRequestWrapper.getContextPath(HttpServletRequestWrapper.java:189)
at org.springframework.web.util.UrlPathHelper.getContextPath(UrlPathHelper.java:325)
at org.springframework.web.util.UrlPathHelper.getPathWithinApplication(UrlPathHelper.java:224)
at org.springframework.web.util.UrlPathHelper.getPathWithinServletMapping(UrlPathHelper.java:177)
at com.vaadin.spring.server.SpringVaadinServletRequest.getPathInfo(SpringVaadinServletRequest.java:68)
at org.atmosphere.cpr.AtmosphereRequest.getPathInfo(AtmosphereRequest.java:160)
at javax.servlet.http.HttpServletRequestWrapper.getPathInfo(HttpServletRequestWrapper.java:171)
at com.vaadin.server.ServletPortletHelper.hasPathPrefix(ServletPortletHelper.java:90)
at com.vaadin.server.ServletPortletHelper.isAppRequest(ServletPortletHelper.java:139)
at com.vaadin.server.VaadinServletService.isOtherRequest(VaadinServletService.java:169)
at com.vaadin.server.VaadinServletService.requestCanCreateSession(VaadinServletService.java:156)
at com.vaadin.server.VaadinService.findOrCreateVaadinSession(VaadinService.java:661)
at com.vaadin.server.VaadinService.findVaadinSession(VaadinService.java:530)
at com.vaadin.server.communication.PushHandler.connectionLost(PushHandler.java:323)
at com.vaadin.server.communication.PushAtmosphereHandler$AtmosphereResourceListener.onDisconnect(PushAtmosphereHandler.java:109)
at org.atmosphere.cpr.AtmosphereResourceImpl.onDisconnect(AtmosphereResourceImpl.java:714)
at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:617)
at org.atmosphere.cpr.AtmosphereResponse.handleException(AtmosphereResponse.java:922)
at org.atmosphere.cpr.AtmosphereResponse.flushBuffer(AtmosphereResponse.java:487)
at org.atmosphere.cpr.AtmosphereInterceptorWriter.flush(AtmosphereInterceptorWriter.java:102)
at org.atmosphere.cpr.AtmosphereResponse$2.flush(AtmosphereResponse.java:589)
at org.atmosphere.handler.AbstractReflectorAtmosphereHandler.onStateChange(AbstractReflectorAtmosphereHandler.java:149)
at com.vaadin.server.communication.PushAtmosphereHandler.onStateChange(PushAtmosphereHandler.java:52)
at org.atmosphere.cpr.DefaultBroadcaster.invokeOnStateChange(DefaultBroadcaster.java:1096)
at org.atmosphere.cpr.DefaultBroadcaster.prepareInvokeOnStateChange(DefaultBroadcaster.java:1116)
at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:921)
at org.atmosphere.cpr.DefaultBroadcaster$3.run(DefaultBroadcaster.java:522)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
