gRPC 0 OK vs 3 INVALID_ARGUMENT
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Both gRPC 0 (OK) and 3 (INVALID_ARGUMENT) belong to the gRPC Status Codes category. 0 indicates that the operation completed successfully. Not an error; returned on success. Meanwhile, 3 means that the client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
Description
The operation completed successfully. Not an error; returned on success.
When You See It
The RPC completed without any issues. This is the expected response for every successful gRPC call.
How to Fix
No fix needed — this indicates everything worked correctly.
Description
The client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
When You See It
A request field failed validation — for example, a negative page size, a malformed email, or a required field left empty.
How to Fix
Inspect the request payload and fix the invalid field. Check the API documentation for expected formats and constraints.
Key Differences
gRPC 0: The operation completed successfully. Not an error; returned on success.
gRPC 3: The client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
You encounter 0 when the RPC completed without any issues. This is the expected response for every successful gRPC call.
You encounter 3 when a request field failed validation — for example, a negative page size, a malformed email, or a required field left empty.
When to Use Which
For 0 (OK): No fix needed — this indicates everything worked correctly. For 3 (INVALID_ARGUMENT): Inspect the request payload and fix the invalid field. Check the API documentation for expected formats and constraints.