gRPC 4 DEADLINE_EXCEEDED vs 14 UNAVAILABLE
Both gRPC 4 (DEADLINE_EXCEEDED) and 14 (UNAVAILABLE) belong to the gRPC Status Codes category. 4 indicates that the deadline expired before the operation could complete. For operations that change the state of the system, this error may be returned even if the operation has completed successfully. Meanwhile, 14 means that the service is currently unavailable. This is most likely a transient condition, which can be corrected by retrying with a backoff.
説明
The deadline expired before the operation could complete. For operations that change the state of the system, this error may be returned even if the operation has completed successfully.
このコードが表示される場合
The RPC took longer than the configured deadline allows. Common in slow network conditions, overloaded servers, or when the deadline is set too aggressively.
解決方法
Increase the client deadline, optimize the server-side processing, or add server-side caching. If the operation might have succeeded, check idempotency before retrying.
説明
The service is currently unavailable. This is most likely a transient condition, which can be corrected by retrying with a backoff.
このコードが表示される場合
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.
解決方法
Retry with exponential backoff. If persistent, check the server health, load balancer configuration, and network connectivity between client and server.
主な違い
gRPC 4: The deadline expired before the operation could complete. For operations that change the state of the system, this error may be returned even if the operation has completed successfully.
gRPC 14: The service is currently unavailable. This is most likely a transient condition, which can be corrected by retrying with a backoff.
You encounter 4 when the RPC took longer than the configured deadline allows. Common in slow network conditions, overloaded servers, or when the deadline is set too aggressively.
You encounter 14 when 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.
どちらをいつ使うか
For 4 (DEADLINE_EXCEEDED): Increase the client deadline, optimize the server-side processing, or add server-side caching. If the operation might have succeeded, check idempotency before retrying. For 14 (UNAVAILABLE): Retry with exponential backoff. If persistent, check the server health, load balancer configuration, and network connectivity between client and server.