Error message is "The symbol 'tapestry.hmac-passphrase' has not been
configured. This is used to configure hash-based message authentication of
Tapestry data stored in forms, or in the URL. You application is less
secure, and more vulnerable to denial-of-service attacks, when this symbol
is not configured.
"

We just want to get rid of the above message.

If we add the following (copied from one of the user's reply at
http://tapestry.1045711.n5.nabble.com/hmac-sample-td5716873.html -

        configuration.add(SymbolConstants.HMAC_PASSPHRASE, new
BigInteger(130, new SecureRandom()).toString(32));

The session timeout frequentlly, as soon as less than 1 minute with error
message like your HMAC id is different from whatever, which is not helpfui
as the users are still working on the form. We need to fill out a lot of
information in the HTML form, before submitting :)



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