gRPC 3 INVALID_ARGUMENT vs 9 FAILED_PRECONDITION
Both gRPC 3 (INVALID_ARGUMENT) and 9 (FAILED_PRECONDITION) belong to the gRPC Status Codes category. 3 indicates that the client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system. Meanwhile, 9 means that the operation was rejected because the system is not in a state required for the operation's execution. For example, deleting a non-empty directory.
描述
The client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
何时出现
A request field failed validation — for example, a negative page size, a malformed email, or a required field left empty.
如何修复
Inspect the request payload and fix the invalid field. Check the API documentation for expected formats and constraints.
描述
The operation was rejected because the system is not in a state required for the operation's execution. For example, deleting a non-empty directory.
何时出现
The request is valid on its own, but the system's current state doesn't allow it — like trying to delete a non-empty directory or update a resource that has been modified concurrently.
如何修复
Bring the system into the required state before retrying. For example, empty the directory first, or re-read the resource to get the latest version before updating.
主要区别
gRPC 3: The client specified an invalid argument. This indicates arguments that are problematic regardless of the state of the system.
gRPC 9: The operation was rejected because the system is not in a state required for the operation's execution. For example, deleting a non-empty directory.
You encounter 3 when a request field failed validation — for example, a negative page size, a malformed email, or a required field left empty.
You encounter 9 when the request is valid on its own, but the system's current state doesn't allow it — like trying to delete a non-empty directory or update a resource that has been modified concurrently.
何时使用哪个
For 3 (INVALID_ARGUMENT): Inspect the request payload and fix the invalid field. Check the API documentation for expected formats and constraints. For 9 (FAILED_PRECONDITION): Bring the system into the required state before retrying. For example, empty the directory first, or re-read the resource to get the latest version before updating.