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https://issues.jboss.org/browse/SEAMFACES-179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616544#comment-12616544
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Brian Leathem commented on SEAMFACES-179:
-----------------------------------------
Summary of an IRC conversation with Pete Muir and Ed Burns, and Lincoln Baxter:
pmuir states this is a problem caused by making a re-entrant call on the thread
to the faces lifecycle. The viewAction component does this by
starting/executing a new JSF lifecycle within the existing JSF lifcycle:
https://github.com/seam/faces/blob/develop/api/src/main/java/org/jboss/seam/faces/component/UIViewAction.java#L405
With respect to re-entrancy, edburns says:
edburns: JSF relies on the re-entrancy model model of the servlet spec
pmuir: pre Servlet 3 that is quite clear, the servlet container will never
reuse a thread before a request has ended
pmuir: in Servlet 3 I believe that requests can be suspended
edburns: the JSF spec has not been updated to account for the re-entrancy
capabilities in Servlet 3.
pmuir: weld assumes that we don't have re-entrancy
Rather than trying to mess with Weld to allow this re-entrancy to work, I
suggested the JSF EG discuss any changes required at the spec level to
accommodate this behavior. Lincoln suggested:
lincolnthree: in prettyfaces i just use a phase listener, unfortunately you
lose out on the whole component tree goodness
lincolnthree: I'm comfortable saying that I think viewAction is a hack to get
around the real problem
lincolnthree: which is that JSF doesn't support phase-level actions like a
front-controller
> s:viewaction not invoked with Mojarra 2.1.2
> -------------------------------------------
>
> Key: SEAMFACES-179
> URL: https://issues.jboss.org/browse/SEAMFACES-179
> Project: Seam Faces
> Issue Type: Bug
> Affects Versions: 3.0.2
> Environment: JBoss 6.1.0-SNAPSHOT (Hudson build) with updated Weld
> 1.1.1-Final and updated Mojarra 2.1.2
> Reporter: Sebastian Sachtleben
> Assignee: Brian Leathem
> Fix For: 3.0.3
>
>
> s:viewAction will not invoke after updating to Mojarra 2.1.2.
> Tested with:
> <f:metadata>
> <s:viewAction action="#{myBean.validate}"/>
> </f:metadata>
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