When a TIBCO Data Virtualization(TDV) published web-service is executed from the browser, it fails with the error "HTTP ERROR 414 - Request URI Too Long error".

Screenshot for reference:

This issue can occur if the URL length of the TDV published web service is greater than 4096. To resolve this, from TDV Studio, navigate to Administration > Configuration> Server> Web Services Interface> Communications> HTTP and HTTPS> Header Buffer Size (On Server Restart) > increase the value as per the requirement (Default value is 4096). Restart TDV services for the changes to take effect.