gRPC
14 UNAVAILABLE
The service is currently unavailable. This is most likely a transient condition, which can be corrected by retrying with a backoff.
When You See This Code
The server is overloaded, shutting down, or a network partition occurred. This is the most common code to retry on, as it's explicitly transient.
How to Fix
Retry with exponential backoff. If persistent, check the server health, load balancer configuration, and network connectivity between client and server.