Page History

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• Bots crawling your site
• Web browser auto-complete functions trying to be helpful
• Users with browser developer tools manually modifying the form from a POST to a GET to see what will happen.
• Users getting a validation error on a form, then re-submitting the form by clicking in the URL address field and hitting Enter.
• In Tapestry versions before 5.4, (rarely) the use of property names for form fields where the property name matches a JavaScript property (see TAP5-2066).

In every known scenario except the last, these errors are harmless and you probably want to redirect the user to the page the form is on – and avoid logging an error. That's not too hard to do. Just add code like the following to your module class (usually AppModule.java):

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