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Support Article

Incorrect addition of a blank parameter name value pair



Submitting a form with hidden input fields without a name attribute and a blank value, adds a blank parameter name value pair.
For example, Purpose=<HarnessName>&ReadOnly=-1&=&ReadOnly=-1&..., where '&=&' is the blank parameter.

Error Messages

Not Applicable.

Steps to Reproduce

  1. Open Pega Mashup using the IIS and ARR Proxy configuration
  2. Submit a form with hidden input fields without a name attribute and a blank value

Root Cause

The blank parameter comes from <input type="hidden" name="" id="pyCustomErrorSection" value=""> hidden input element generated in all harness rules, as part of any harness in Rule-Utility-function (RUF): Harness.GenerateHarnessHTML Pega-UIEngine.

That is, <input type="hidden" name="" id="pyCustomErrorSection" value=""> was generated as part of the harness in RUF: Harness.GenerateHarnessHTML Pega-UIEngine.

When using IIS ARR Proxy configuration, the IIS server does not proxy the request to the Pega application when it contains this content. This returns a HTTP 200 with no error message. The problems are with Internet Explorer and IIS ARR Proxy configuration as technically this is a valid request and only causes issues within the IIS Proxy server.


Apply HFix-39911.

Published February 13, 2018 - Updated October 8, 2020

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