Fix "Session is not live" error

I was able to reproduce this error on LTS 2015 with HF43. It is probably one of scenarios which can lead to this exception

1. First there is a transaction timeout in thread #9 during the commit of the transaction

   2018-08-21 14:41:41,723 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] RESTORE_VIEW 1: 17 ms
   2018-08-21 14:41:42,678 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] RENDER_RESPONSE 6: 938 ms
   2018-08-21 14:57:09,584 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] RESTORE_VIEW 1: 18 ms
   2018-08-21 14:57:10,474 ERROR [Nuxeo-Administrative-Statuses-Notify-Scheduler] [org.nuxeo.runtime.transaction.TransactionHelper] Unable to commit/rollback
   javax.transaction.RollbackException: Unable to commit: Transaction timeout
           at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:267)
           at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
           at org.nuxeo.runtime.jtajca.NuxeoContainer$UserTransactionImpl.commit(NuxeoContainer.java:525)
           at org.nuxeo.runtime.transaction.TransactionHelper.commitOrRollbackTransaction(TransactionHelper.java:311)
           at org.nuxeo.ecm.core.management.statuses.AdministrativeStatusManagerImpl$NotifyStatusesHandler.run(AdministrativeStatusManagerImpl.java:124)
           at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
           at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
           at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
           at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
           at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
           at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
           at java.lang.Thread.run(Thread.java:748)
   2018-08-21 14:57:11,059 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] RENDER_RESPONSE 6: 587 ms
   2018-08-21 14:57:11,060 WARN  [http-apr-0.0.0.0-8080-exec-9] [Transaction] Unexpected exception from beforeCompletion; transaction will roll back
   java.lang.IllegalStateException: unknown connection org.nuxeo.ecm.core.storage.sql.ra.ConnectionImpl@14001de5 in org.nuxeo.ecm.core.storage.sql.ra.ManagedConnectionImpl@532e311e
           at org.nuxeo.ecm.core.storage.sql.ra.ManagedConnectionImpl.removeConnection(ManagedConnectionImpl.java:247)
           at org.nuxeo.ecm.core.storage.sql.ra.ManagedConnectionImpl.close(ManagedConnectionImpl.java:257)
           at org.nuxeo.ecm.core.storage.sql.ra.ConnectionImpl.close(ConnectionImpl.java:106)
           at org.nuxeo.ecm.core.storage.sql.coremodel.SQLSession.close(SQLSession.java:125)
           at org.nuxeo.ecm.core.api.local.LocalSession.closeInThisThread(LocalSession.java:164)
           at org.nuxeo.ecm.core.api.local.LocalSession.beforeCompletion(LocalSession.java:144)
           at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:520)
           at org.apache.geronimo.transaction.manager.TransactionImpl.beforeCompletion(TransactionImpl.java:504)
           at org.apache.geronimo.transaction.manager.TransactionImpl.beforePrepare(TransactionImpl.java:407)
           at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:255)
           at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
           at org.nuxeo.runtime.jtajca.NuxeoContainer$UserTransactionImpl.commit(NuxeoContainer.java:525)
           at org.jboss.seam.transaction.UTTransaction.commit(UTTransaction.java:52)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:617)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:608)
           at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsAfterPhase(SeamPhaseListener.java:344)
           at org.jboss.seam.jsf.SeamPhaseListener.afterServletPhase(SeamPhaseListener.java:244)
           at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:195)
           at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189)
           at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:107)
           at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
   ...
   2018-08-21 14:57:11,062 WARN  [http-apr-0.0.0.0-8080-exec-9] [org.jboss.seam.jsf.SeamPhaseListener] uncaught exception, passing to exception handler
   java.lang.IllegalStateException: Could not commit transaction
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:629)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:608)
           at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsAfterPhase(SeamPhaseListener.java:344)
           at org.jboss.seam.jsf.SeamPhaseListener.afterServletPhase(SeamPhaseListener.java:244)
           at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:195)
           at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189)
   ...
   Caused by: javax.transaction.RollbackException: Unable to commit: transaction marked for rollback
           at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:269)
           at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
           at org.nuxeo.runtime.jtajca.NuxeoContainer$UserTransactionImpl.commit(NuxeoContainer.java:525)
           at org.jboss.seam.transaction.UTTransaction.commit(UTTransaction.java:52)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:617)
           ... 89 more
   2018-08-21 14:57:11,085 ERROR [http-apr-0.0.0.0-8080-exec-9] [org.jboss.seam.jsf.SeamPhaseListener] swallowing exception
   java.lang.IllegalStateException: Could not commit transaction
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:629)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:608)
           at org.jboss.seam.jsf.SeamPhaseListener.handleTransactionsAfterPhase(SeamPhaseListener.java:344)
   ...
   Caused by: javax.transaction.RollbackException: Unable to commit: transaction marked for rollback
           at org.apache.geronimo.transaction.manager.TransactionImpl.commit(TransactionImpl.java:269)
           at org.apache.geronimo.transaction.manager.TransactionManagerImpl.commit(TransactionManagerImpl.java:252)
           at org.nuxeo.runtime.jtajca.NuxeoContainer$UserTransactionImpl.commit(NuxeoContainer.java:525)
           at org.jboss.seam.transaction.UTTransaction.commit(UTTransaction.java:52)
           at org.jboss.seam.jsf.SeamPhaseListener.commitOrRollback(SeamPhaseListener.java:617)
           ... 89 more
   2018-08-21 14:57:11,326 ERROR [http-apr-0.0.0.0-8080-exec-9] [org.jboss.seam.contexts.Contexts] could not discover transaction status
   2018-08-21 14:57:11,413 ERROR [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.web.common.exceptionhandling.DefaultNuxeoExceptionHandler] java.lang.NullPointerException
           at org.apache.catalina.connector.Request.notifyAttributeRemoved(Request.java:1596)
           at org.apache.catalina.connector.Request.removeAttribute(Request.java:1483)
           at org.apache.catalina.connector.RequestFacade.removeAttribute(RequestFacade.java:553)
           at javax.servlet.ServletRequestWrapper.removeAttribute(ServletRequestWrapper.java:248)
           at javax.servlet.ServletRequestWrapper.removeAttribute(ServletRequestWrapper.java:248)
           at com.sun.faces.context.RequestMap.remove(RequestMap.java:113)
           at org.jboss.seam.contexts.BasicContext.remove(BasicContext.java:73)
           at org.jboss.seam.Component.newInstance(Component.java:2211)
           at org.jboss.seam.Component.getInstance(Component.java:2035)
           at org.jboss.seam.Component.getInstance(Component.java:2014)
           at org.jboss.seam.Component.getInstance(Component.java:2008)
           at org.jboss.seam.Component.getInstance(Component.java:1981)
           at org.jboss.seam.Component.getInstance(Component.java:1976)
           at org.jboss.seam.core.Events.instance(Events.java:157)
           at org.jboss.seam.core.Events.exists(Events.java:152)
           at org.jboss.seam.contexts.Contexts.destroy(Contexts.java:275)
           at org.jboss.seam.contexts.Contexts.flushAndDestroyContexts(Contexts.java:395)
           at org.jboss.seam.contexts.Lifecycle.endRequest(Lifecycle.java:164)
   ....
   2018-08-21 14:57:11,414 ERROR [http-apr-0.0.0.0-8080-exec-9] [nuxeo-error-log] java.lang.NullPointerException
           at org.apache.catalina.connector.Request.notifyAttributeRemoved(Request.java:1596)
           at org.apache.catalina.connector.Request.removeAttribute(Request.java:1483)
           at org.apache.catalina.connector.RequestFacade.removeAttribute(RequestFacade.java:553)
           at javax.servlet.ServletRequestWrapper.removeAttribute(ServletRequestWrapper.java:248)
           at javax.servlet.ServletRequestWrapper.removeAttribute(ServletRequestWrapper.java:248)
           at com.sun.faces.context.RequestMap.remove(RequestMap.java:113)
           at org.jboss.seam.contexts.BasicContext.remove(BasicContext.java:73)
           at org.jboss.seam.Component.newInstance(Component.java:2211)
           at org.jboss.seam.Component.getInstance(Component.java:2035)
           at org.jboss.seam.Component.getInstance(Component.java:2014)
           at org.jboss.seam.Component.getInstance(Component.java:2008)
           at org.jboss.seam.Component.getInstance(Component.java:1981)
           at org.jboss.seam.Component.getInstance(Component.java:1976)
           at org.jboss.seam.core.Events.instance(Events.java:157)
           at org.jboss.seam.core.Events.exists(Events.java:152)
           at org.jboss.seam.contexts.Contexts.destroy(Contexts.java:275)
           at org.jboss.seam.contexts.Contexts.flushAndDestroyContexts(Contexts.java:395)
           at org.jboss.seam.contexts.Lifecycle.endRequest(Lifecycle.java:164)
   

2. Then for 5 minutes the thread #9 is not used and the NuxeoConnectionTrackingCoordinator will kill the connection handle which was leaked

   2018-08-21 15:02:40,837 ERROR [PoolIdleReleaseTimer] [org.nuxeo.runtime.jtajca.NuxeoConnectionTrackingCoordinator] Killed handle: org.nuxeo.ecm.core.storage.sql.ra.ConnectionImpl@14001de5ManagedConnectionInfo: org.apache.geronimo.connector.outbound.ManagedConnectionInfo@606eaf29. mc: org.nuxeo.ecm.core.storage.sql.ra.ManagedConnectionImpl@532e311e],  was obtained by http-apr-0.0.0.0-8080-exec-9 at Tue Aug 21 14:57:10 CEST 2018 and timed out at Tue Aug 21 15:02:10 CEST 2018
   java.lang.Exception: Stack Trace
           at org.apache.geronimo.connector.outbound.ConnectionInfo.setTrace(ConnectionInfo.java:119)
           at org.apache.geronimo.connector.outbound.ConnectionHandleInterceptor.getConnection(ConnectionHandleInterceptor.java:57)
           at org.apache.geronimo.connector.outbound.TCCLInterceptor.getConnection(TCCLInterceptor.java:39)
           at org.apache.geronimo.connector.outbound.ConnectionTrackingInterceptor.getConnection(ConnectionTrackingInterceptor.java:66)
           at org.apache.geronimo.connector.outbound.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:77)
           at org.nuxeo.runtime.jtajca.NuxeoContainer$ConnectionManagerWrapper.allocateConnection(NuxeoContainer.java:739)
           at org.nuxeo.ecm.core.storage.sql.ra.ConnectionFactoryImpl.getConnection(ConnectionFactoryImpl.java:96)
           at org.nuxeo.ecm.core.storage.sql.ra.ConnectionFactoryImpl.getSession(ConnectionFactoryImpl.java:159)
           at org.nuxeo.ecm.core.repository.RepositoryService.getSession(RepositoryService.java:230)
           at org.nuxeo.ecm.core.api.local.LocalSession.createSession(LocalSession.java:117)
           at org.nuxeo.ecm.core.api.local.LocalSession.getSession(LocalSession.java:107)
           at org.nuxeo.ecm.core.api.AbstractSession.resolveReference(AbstractSession.java:337)
           at org.nuxeo.ecm.core.api.AbstractSession.getDocument(AbstractSession.java:955)
           at org.nuxeo.ecm.webapp.context.NavigationContextBean.navigateToRef(NavigationContextBean.java:628)
           at org.nuxeo.ecm.webapp.context.NavigationContextBean.navigateTo(NavigationContextBean.java:710)
   

3. Later one of my requests reuses thread #9 and the exception "Session is not live" is thrown because it tries to reuse the SessionImpl object whose liveness has been set to false when the the connection handle was killed

   2018-08-21 15:21:22,143 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] RESTORE_VIEW 1: 356 ms
   2018-08-21 15:21:22,147 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] APPLY_REQUEST_VALUES 2: 3 ms
   2018-08-21 15:21:22,150 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] PROCESS_VALIDATIONS 3: 3 ms
   2018-08-21 15:21:22,153 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] UPDATE_MODEL_VALUES 4: 3 ms
   2018-08-21 15:21:22,246 DEBUG [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.ui.web.rest.JSFDebugPhaseListener] INVOKE_APPLICATION 5: 93 ms
   2018-08-21 15:21:22,255 ERROR [http-apr-0.0.0.0-8080-exec-9] [org.nuxeo.ecm.platform.web.common.exceptionhandling.DefaultNuxeoExceptionHandler] javax.servlet.ServletException: On requestURL: http://nereid2:8080/nuxeo/search/search.faces
           at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:138)
           at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
           at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
           at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:144)
   ...
   Caused by: javax.servlet.ServletException: java.lang.IllegalStateException: Session is not live
           at javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)
   ...
   Caused by: javax.faces.el.EvaluationException: java.lang.IllegalStateException: Session is not live
           at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
           at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
   ...
   Caused by: java.lang.IllegalStateException: Session is not live
           at org.nuxeo.ecm.core.storage.sql.SessionImpl.checkLive(SessionImpl.java:155)
           at org.nuxeo.ecm.core.storage.sql.SessionImpl.getRootNode(SessionImpl.java:304)
           at org.nuxeo.ecm.core.storage.sql.ra.ConnectionImpl.getRootNode(ConnectionImpl.java:178)
           at org.nuxeo.ecm.core.storage.sql.coremodel.SQLSession.<init>(SQLSession.java:101)
           at org.nuxeo.ecm.core.storage.sql.ra.ConnectionFactoryImpl.getSession(ConnectionFactoryImpl.java:159)
           at org.nuxeo.ecm.core.repository.RepositoryService.getSession(RepositoryService.java:230)
           at org.nuxeo.ecm.core.api.local.LocalSession.createSession(LocalSession.java:117)
           at org.nuxeo.ecm.core.api.local.LocalSession.getSession(LocalSession.java:107)
           at org.nuxeo.ecm.core.api.AbstractSession.resolveReference(AbstractSession.java:337)
           at org.nuxeo.ecm.core.api.AbstractSession.exists(AbstractSession.java:854)
           at org.nuxeo.ecm.platform.userworkspace.core.service.AbstractUserWorkspaceImpl.getExistingUserWorkspaceRoot(AbstractUserWorkspaceImpl.java:223)
           at org.nuxeo.ecm.platform.userworkspace.core.service.AbstractUserWorkspaceImpl.getCurrentUserPersonalWorkspace(AbstractUserWorkspaceImpl.java:214)
           at org.nuxeo.ecm.platform.userworkspace.core.service.AbstractUserWorkspaceImpl.getCurrentUserPersonalWorkspace(AbstractUserWorkspaceImpl.java:199)
           at org.nuxeo.search.ui.SearchUIServiceImpl.saveSearch(SearchUIServiceImpl.java:115)
           at org.nuxeo.search.ui.seam.SearchUIActions.saveSearch(SearchUIActions.java:389)
   

A solution Is required by on all the SUPNXP tickets tagged sessionisnotlive
https://jira.nuxeo.com/issues/?jql=cf%5B10080%5D%20%3D%20sessionisnotlive