gRPC 2 UNKNOWN vs 12 UNIMPLEMENTED
Both gRPC 2 (UNKNOWN) and 12 (UNIMPLEMENTED) belong to the gRPC Status Codes category. 2 indicates that an unknown error occurred. This may be returned when a server raises an exception that doesn't map to any known gRPC status code. Meanwhile, 12 means that the operation is not implemented or is not supported/enabled in this service.
Description
An unknown error occurred. This may be returned when a server raises an exception that doesn't map to any known gRPC status code.
When You See It
The server threw an unhandled exception or returned an error that gRPC couldn't classify into a more specific status code.
How to Fix
Check the server logs for the underlying exception. Wrap server-side errors with explicit gRPC status codes instead of letting them bubble up as UNKNOWN.
Description
The operation is not implemented or is not supported/enabled in this service.
When You See It
The client called an RPC method that the server does not implement. This often happens when the client uses a newer proto definition than the server supports.
How to Fix
Verify the server version supports the method you're calling. Update the server to implement the missing method, or use an alternative endpoint.
Key Differences
gRPC 2: An unknown error occurred. This may be returned when a server raises an exception that doesn't map to any known gRPC status code.
gRPC 12: The operation is not implemented or is not supported/enabled in this service.
You encounter 2 when the server threw an unhandled exception or returned an error that gRPC couldn't classify into a more specific status code.
You encounter 12 when the client called an RPC method that the server does not implement. This often happens when the client uses a newer proto definition than the server supports.
When to Use Which
For 2 (UNKNOWN): Check the server logs for the underlying exception. Wrap server-side errors with explicit gRPC status codes instead of letting them bubble up as UNKNOWN. For 12 (UNIMPLEMENTED): Verify the server version supports the method you're calling. Update the server to implement the missing method, or use an alternative endpoint.