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https://issues.apache.org/jira/browse/MYFACES-3117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028944#comment-13028944
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Martin Kočí commented on MYFACES-3117:
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> double submit: when server processes two or more requests from same client
> (one DOM instance) to same URL (same view in case of JSF):
<h:form>
<h:commandButton actionListener="#{invokeLongRunningThread}" />
<h:form>
<h:commandButton actionListener="#{invokeSomething}" />
</h:form>
in this case, second button creates another request/response to the same view,
which is currently processing LongRunningThread
Robert, do you have all requests AJAXied? If so you can ignore double submit
problem, because ajax has own queue.
Anyway this problem is critical for me too (blocks a product delivery) - I'll
look at it asap.
> Current server state saving implementation prevents multi-window usage
> ----------------------------------------------------------------------
>
> Key: MYFACES-3117
> URL: https://issues.apache.org/jira/browse/MYFACES-3117
> Project: MyFaces Core
> Issue Type: Bug
> Components: General
> Affects Versions: 2.0.6-SNAPSHOT
> Environment: myfaces core trunk
> Reporter: Martin Kočí
> Priority: Critical
> Attachments: MYFACES-3117.patch
>
>
> Problem:
> open two tabs (or windows) in browser with view:
> <h:body>
> <h:form id="formId">
> <h:commandButton value="Click me 20x!" />
> </h:form>
> </h:body>
> then click the button on the first tab 20x or more -> then click the button
> on the second tab -> you will get the most beloved ViewExpiredException.
> Reason:
> oam.SerializedViewCollection drops the saved state for 2. tab from map.
> Suggestion:
> remove the successfully restored view state from map. This can be done,
> because each SerializedViewKey is unique over *all requests* for one
> HttpSession - see
> DefaultFaceletsStateManagementHelper.nextViewSequence(FacesContext). Because
> each request has unique sequence number, we can the "just restored" one
> remove from the map, because it can never come from client again.
> Open question: the previous statement is true except the double submit
> problem: JAVASERVERFACES_SPEC_PUBLIC-559. In this case, server can
> process same request (with the same sequence number) twice.
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