[seam-issues] [JBoss JIRA] Closed: (JBSEAM-4800) s:link does not work on failover in a clustered environment

Marek Novotny (JIRA) jira-events at lists.jboss.org
Fri Jul 29 15:13:23 EDT 2011

     [ https://issues.jboss.org/browse/JBSEAM-4800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marek Novotny closed JBSEAM-4800.

         Assignee: Marek Novotny
    Fix Version/s: 2.3.0.ALPHA
                       (was: 2.3.0.BETA1)
       Resolution: Done

back ported the fix from EAP 5.1.1

> s:link does not work on failover in a clustered environment
> -----------------------------------------------------------
>                 Key: JBSEAM-4800
>                 URL: https://issues.jboss.org/browse/JBSEAM-4800
>             Project: Seam 2
>          Issue Type: Bug
>          Components: JSF Integration
>    Affects Versions: 2.2.1.Final
>         Environment: EAP 5.1
> Seam 2.2.2.EAP5
>            Reporter: Samuel Mendenhall
>            Assignee: Marek Novotny
>             Fix For: 2.3.0.ALPHA
> When clicking on an s:link after a node has been taken down, the exception below is thrown.  The s:link will only work if the page is refreshed first so it is served by the new JBoss instance, but that negates transparent failover.
> Method of reproducing:
> * Two EAP 5.1 nodes fronted with mod_jk.  No firewall, sticky sessions + session replication definitely enabled.
> * JBDS Seam generated ear + a simple @Clustered EJB3 which has a method that takes a parameter and prints the EL parametrized text (I don't think EL parametrization is relevant here)
> * Click on the s:link on the page, it invokes fine, go back in the browser.  Shutdown the active JBoss instance.  Click the s:link again which is redirected to the 2nd JBoss now and receive:
> 14:17:42,995 ERROR [Exceptions] handled and logged exception
> java.lang.IllegalStateException: Unable to read view /home.xhtml to execute action "#{someComponent.printText('Hello World')}"
>         at org.jboss.seam.navigation.SafeActions.isActionSafe(SafeActions.java:67)
>         at org.jboss.seam.navigation.Pages.callAction(Pages.java:699)
>         at org.jboss.seam.navigation.Pages.preRender(Pages.java:331)
>         at org.jboss.seam.jsf.SeamPhaseListener.preRenderPage(SeamPhaseListener.java:561)
>         at org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:472)
>         at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:148)
>         at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:118)
> SafeActions.java:67 isn't so telling:
> ===================
> String viewId = id.substring(0, loc);
> String action = "\"#{" + id.substring(loc+1) + "}\"";
> InputStream is = FacesContext.getCurrentInstance().getExternalContext().getResourceAsStream(viewId);
> if (is==null) throw new IllegalStateException("Unable to read view " + "/" + viewId + " to execute action " + action);
> ===================
> The code says the InputStream is null on failover, so the getResourceAsStream(viewId) failed to return anything.

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