Facing java.lang.IllegalStateException: UT000010: Session not found / Sesson is invalid in JBoss EAP 7.x

Question

• Getting 501 Server Error. Expected to see at least the login page again (using basic authentication). Have seen others have this issue(as of Wildfly 9).

• The following ERROR message is shown in server.log on EAP 7.0.x:

^[[0m^[[31m13:01:56,706 ERROR [io.undertow.request] (default task-174) UT005023: Exception handling request to /****/: java.lang.IllegalStateException: UT000010: Session not found 6HmyjhBLCPLCjr7cCVF1eUyj578j2feyQlX62Oar
        at io.undertow.server.session.InMemorySessionManager$SessionImpl.getAttribute(InMemorySessionManager.java:464) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.spec.HttpSessionImpl.getAttribute(HttpSessionImpl.java:122) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.checkBeanIdentifierIndexConsistency(HttpSessionContextImpl.java:98) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.associate(HttpSessionContextImpl.java:47) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.associate(HttpSessionContextImpl.java:23) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.servlet.HttpContextLifecycle.requestInitialized(HttpContextLifecycle.java:237) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.servlet.WeldInitialListener.requestInitialized(WeldInitialListener.java:152) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at io.undertow.servlet.core.ApplicationListeners.requestInitialized(ApplicationListeners.java:245) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_91]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_91]
        at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_91]

^[[0m^[[33m13:01:56,709 WARN  [org.jboss.weld.Servlet] (default task-174) WELD-000717: Unable to deactivate context org.jboss.weld.context.http.HttpSessionContextImpl@3b269bdc when destroying request HttpServletRequestImpl [ GET /****/ ]
^[[0m^[[31m13:02:02,039 ERROR [io.undertow.request] (default task-140) UT005023: Exception handling request to /****/: java.lang.IllegalStateException: UT000010: Session not found 6HmyjhBLCPLCjr7cCVF1eUyj578j2feyQlX62Oar
        at io.undertow.server.session.InMemorySessionManager$SessionImpl.getAttribute(InMemorySessionManager.java:464) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.spec.HttpSessionImpl.getAttribute(HttpSessionImpl.java:122) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.checkBeanIdentifierIndexConsistency(HttpSessionContextImpl.java:98) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.associate(HttpSessionContextImpl.java:47) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.context.http.HttpSessionContextImpl.associate(HttpSessionContextImpl.java:23) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.servlet.HttpContextLifecycle.requestInitialized(HttpContextLifecycle.java:237) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at org.jboss.weld.servlet.WeldInitialListener.requestInitialized(WeldInitialListener.java:152) [weld-core-impl-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1]
        at io.undertow.servlet.core.ApplicationListeners.requestInitialized(ApplicationListeners.java:245) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175) [undertow-servlet-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792) [undertow-core-1.3.21.Final-redhat-1.jar:1.3.21.Final-redhat-1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_91]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_91]
        at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_91]

^[[0m^[[33m13:02:02,040 WARN  [org.jboss.weld.Servlet] (default task-140) WELD-000717: Unable to deactivate context org.jboss.weld.context.http.HttpSessionContextImpl@3b269bdc when destroying request HttpServletRequestImpl [ GET /****/ ]

• The following ERROR message is shown in server.log on EAP 7.1.x or later:

ERROR [io.undertow.request] (default task-4) UT005023: Exception handling request to /test/example.jsp: java.lang.IllegalStateException: UT000010: Session is invalid IJW9_ppXSxPokd0cnC9lHYI6w6xiWWSPaxRhOVst
    at io.undertow.server.session.InMemorySessionManager$SessionImpl.getAttribute(InMemorySessionManager.java:512)
    at io.undertow.servlet.spec.HttpSessionImpl.getAttribute(HttpSessionImpl.java:122)
    at org.apache.jsp.example_jsp._jspService(example_jsp.java:113)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:791)
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
    at io.undertow.jsp.JspFileHandler.handleRequest(JspFileHandler.java:32)
    at io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
    at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
    at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487)
    at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1349)
    at java.lang.Thread.run(Thread.java:748)