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https://issues.apache.org/jira/browse/TAP5-2037?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship closed TAP5-2037.
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Resolution: Fixed
Fix Version/s: 5.4
Assignee: Howard M. Lewis Ship
> ValidationTracker/Flash persistence race condition with AJAX
> ------------------------------------------------------------
>
> Key: TAP5-2037
> URL: https://issues.apache.org/jira/browse/TAP5-2037
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.1.0.5
> Reporter: Jiri Tousek
> Assignee: Howard M. Lewis Ship
> Fix For: 5.4
>
>
> I have a form with a field validated using an AJAX request on blur, both form
> and AJAX requests go to the same page. Sometimes when I submit an invalid
> form with the AJAX-validated field filled as last, the form will return with
> no values and no errors shown (should return with last values and validation
> errors above).
> I tracked the issue down to the form's ValidatorTracker in form re-display
> request being a different object than the one that I store validation errors
> in. I have no conclusive proof but I believe what happens is that a race
> condition occurs between the submit - redirect back to form logic and the
> AJAX field validation (the AJAX validation is fired the same instance as form
> submit since it's the last field of the form). The form's validation tracker
> is by default taken from the defaultValidationTracker property which has
> PersistenceConstants.FLASH (i.e. stored until next request). I think that the
> cause of ValidationTracker not being the same in re-display and in submit
> request might be the AJAX validation request (or its critical part) getting
> in between the two requests used for form submission and re-display, like
> this:
> - form submit (creates a ValidationTracker and stores errors in it)
> - AJAX validation request ("eats up" the ValidationTracker's lifetime of
> "until next request")
> - form re-display request (creates a new ValidationTracker with no errors in
> it)
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