[ARROW-16023] [FlightRPC][Python] Differentiate between intentional and unintentional errors in server RPC handlers

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: FlightRPC, Python
• External issue URL: https://github.com/apache/arrow/issues/31444
• Assignee: Unassigned
• Reporter: David Li
• Created: 24/Mar/22 20:10
• Updated: 11/Jan/23 11:41

Description

Right now, in Python, to signal an error to the client, you raise an exception. But some exceptions are unintentional, and for development/monitoring purposes, it would be good to log them. There's no way to differentiate between the two.

ARROW-15909 tries to log some exceptions and filter out ones that would just be noise, but a better long-term solution would be to mimic gRPC/Java and provide an error callback to explicitly signal that we want to raise an error.