Using ICEfaces 1.7.1's Auction Monitor and Componet-Showcase applications combined in one EAR deployed to GlassFish V2.UR1, the second accessed application almost immediately displays the "User Session Expired" message. The following exception is found in the logs:

java.lang.RuntimeException: Query does not contain parameter named: sybxRWdIuPWBGv0ww_nVxg
        at com.icesoft.faces.webapp.http.servlet.ServletRequestResponse.checkExistenceOf(ServletRequestResponse.java:281)
        at com.icesoft.faces.webapp.http.servlet.ServletRequestResponse.getParameterAsStrings(ServletRequestResponse.java:116)
        at com.icesoft.faces.webapp.http.core.DisposeViews.service(DisposeViews.java:20)
        at com.icesoft.faces.webapp.http.common.ServerProxy.service(ServerProxy.java:11)
        at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer$Matcher.serviceOnMatch(PathDispatcherServer.java:50)
        at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:19)
        at com.icesoft.faces.webapp.http.servlet.GlassFishAdaptingServlet.service(GlassFishAdaptingServlet.java:60)
        at com.icesoft.faces.webapp.http.servlet.EnvironmentAdaptingServlet.service(EnvironmentAdaptingServlet.java:63)
        at com.icesoft.faces.webapp.http.servlet.MainSessionBoundServlet.service(MainSessionBoundServlet.java:151)
        at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher$Matcher.serviceOnMatch(PathDispatcher.java:52)
        at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:29)
        at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:82)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
        at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:46)
        at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:290)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
        at com.sun.enterprise.web.connector.grizzly.comet.CometEngine.executeServlet(CometEngine.java:547)
        at com.sun.enterprise.web.connector.grizzly.comet.CometEngine.handle(CometEngine.java:299)
        at com.sun.enterprise.web.connector.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:87)
        at com.sun.enterprise.web.connector.grizzly.async.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:175)
        at com.sun.enterprise.web.connector.grizzly.async.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:153)
        at com.sun.enterprise.web.connector.grizzly.async.AsyncProcessorTask.doTask(AsyncProcessorTask.java:92)
        at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

Running the applications separately works fine.

Using ICEfaces 1.7.0, I was unable to reproduce this.