We have a GWT application deployed on AWS ELB. We're using an Atmosphere.js and websocket set up to get number of live users every second to the UI. I keep seeing this error on the UI:
Websocket closed, reason: Connection was closed abnormally (that is, with no close frame being sent). - wasClean: false
and on the server side I see
02-Feb-2017 09:27:08.486 SEVERE [http-nio-8080-exec-5] org.atmosphere.container.JSR356Endpoint.onError java.io.EOFException at org.apache.coyote.http11.upgrade.NioServletInputStream.doRead(NioServletInputStream.java:97) at org.apache.coyote.http11.upgrade.AbstractServletInputStream.read(AbstractServletInputStream.java:124) at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:60) at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler$WsReadListener.onDataAvailable(WsHttpUpgradeHandler.java:185) at org.apache.coyote.http11.upgrade.AbstractServletInputStream.onDataAvailable(AbstractServletInputStream.java:198) at org.apache.coyote.http11.upgrade.AbstractProcessor.upgradeDispatch(AbstractProcessor.java:96) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:647) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)
EDIT :
Listener configuration:
At times when there is a lot of activity on this page, the server eventually crashes.
What could be the cause for the exception I see on the server side?