unexpected client logout

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We're getting complaints from users who are frequently logged out in our mendix app. Because this is happening almost every minute I searched the username in our application log and found some stacktraces directly after the logged. What does this mean: An existing connection was forcibly closed by the remote host The customer said he uses IE, but I found this in the log: 2012-05-16 08:52:47.142 INFO - Connector: New login request from [Source-IP: client-ip, User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)] 2012-05-16 12:58:19.864 INFO - Core: Killing old session for user user@company.nl because new session is created. 2012-05-16 12:58:19.864 INFO - Core: Login OK: user 'user@company.nl'. 2012-05-16 12:58:20.286 ERROR Connectororg.eclipse.jetty.io.EofException at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:885) at org.eclipse.jetty.http.AbstractGenerator.flush(AbstractGenerator.java:421) at org.eclipse.jetty.server.HttpOutput.flush(HttpOutput.java:78) at org.eclipse.jetty.server.HttpConnection$Output.flush(HttpConnection.java:1081) at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:157) at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:86) at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1026) at org.apache.commons.io.IOUtils.copy(IOUtils.java:999) at lH.processRequest(SourceFile:30) at fI.a(SourceFile:60) at com.mendix.core.MxRuntime.processRequest(SourceFile:938) at com.mendix.m2ee.server.handler.RuntimeHandler.handle(RuntimeHandler.java:42) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:334) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:559) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:992) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:541) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:203) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:406) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:462) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Unknown Source) Caused by: java.io.IOException: An existing connection was forcibly closed by the remote host at sun.nio.ch.SocketDispatcher.write0(Native Method) at sun.nio.ch.SocketDispatcher.write(Unknown Source) at sun.nio.ch.IOUtil.writeFromNativeBuffer(Unknown Source) at sun.nio.ch.IOUtil.write(Unknown Source) at sun.nio.ch.SocketChannelImpl.write(Unknown Source) at org.eclipse.jetty.io.nio.ChannelEndPoint.flush(ChannelEndPoint.java:165) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.flush(SelectChannelEndPoint.java:239) at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:829) at org.eclipse.jetty.http.AbstractGenerator.flush(AbstractGenerator.java:421) at org.eclipse.jetty.server.HttpOutput.flush(HttpOutput.java:78) at org.eclipse.jetty.server.HttpConnection$Output.flush(HttpConnection.java:1081) at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:157) at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:86) at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1026) at org.apache.commons.io.IOUtils.copy(IOUtils.java:999) at lH.processRequest(SourceFile:30) at fI.a(SourceFile:60) at com.mendix.core.MxRuntime.processRequest(SourceFile:938) at com.mendix.m2ee.server.handler.RuntimeHandler.handle(RuntimeHandler.java:42) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:334) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:559) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:992) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:541) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:203) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:406) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:462) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Unknown Source)
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1 answers
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I vaguely remember this error seeing this error before, I think it only occurs in IE and is fixed in a later version, but don't pin me down on this. Is your user using IE? Is there a proxy between your client and server?

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