What is the result of a Gateway process failure?

When a Gateway process fails in Tableau Server, it serves as the primary interface for handling user requests and directing them to the appropriate processes within the cluster. The function of the Gateway is crucial because it acts as a single point of entry for all communication between client requests and backend services.

When the Gateway is unavailable, it cannot route requests, which disrupts access to Tableau Server functionalities. As a result, users experience a complete unavailability of the service; they cannot interact with dashboards, access data, or perform any actions requiring the server's functionalities.

This dependency on the Gateway means that if it fails, the entire Tableau Server cluster ceases to be functional from the user's perspective, leading to widespread inaccessibility rather than just localized issues or partial functionality. This is why the correct answer highlights that the entire cluster becomes unavailable when a Gateway process failure occurs.