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https://issues.apache.org/jira/browse/TAPESTRY-2784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13162162#comment-13162162
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Bob Harner commented on TAPESTRY-2784:
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As a Tapestry 5.x issue, this should be moved to the "TAP5" project in JIRA.
> Tapestry should not persist error messages during XHR requests
> --------------------------------------------------------------
>
> Key: TAPESTRY-2784
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2784
> Project: Tapestry
> Issue Type: Bug
> Components: Core Components
> Reporter: Ville Virtanen
> Priority: Minor
>
> Tapestry persists the error messages that result from form validation to
> support the post redirect get paradigm, which is correct and expected
> behavior. However, this is not the correct nor most efficient way to handle
> things during AJAX requests, as the response is rendered out during the same
> request.
> This was discussed with Thiago on the mailing list:
> http://tapestry.1045711.n5.nabble.com/T5-3-rc-3-Error-messages-and-AJAX-td4974222.html
> I dont see any side effects of this, but the least that must be done is to
> prevent the persistence when the errors are red during the same request. Now
> the errors are present on subsequent request too (shown twice).
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