Skip to main content
12

UNIMPLEMENTED

ActiveHTTP 501

The operation is not implemented or not supported by this server. UNIMPLEMENTED is returned when a client calls an RPC method that the server does not implement, or when a server stub is a placeholder.

Description

UNIMPLEMENTED indicates the server recognizes the method signature but hasn't implemented it. This is different from NOT_FOUND – the method exists in the proto definition but has no implementation.

Common causes

  • RPC method not implemented
  • Feature not available in this version
  • Stub method placeholder

HTTP equivalent

HTTP 501 – View status code reference →