Error retries
The Amazon SDKs implement automatic retry logic for requests that return error responses. You can configure the retry settings for the Amazon SDKs. For more information, see your SDK's documentation.
You can configure the Amazon CLI to automatically retry some failed requests. For more information about configuring retries for the Amazon CLI, see Amazon CLI retries in the Amazon Command Line Interface User Guide.
The Amazon Query API does not support retry logic for failed requests. If you are using HTTP or HTTPS requests, you must implement retry logic in your client application.
The following table shows the possible API error responses. Some API errors are retryable. Your client application should always retry failed requests that receive a retryable error.
| Error | Response code | Description | Thrown by | Retryable? |
|---|---|---|---|---|
InternalServerException |
500 | The request failed due to a network or Amazon server-side issue. | All APIs |
Yes |
ThrottlingException |
400 | The number of API requests has exceeded the maximum allowed API request throttling limit for the account. | All APIs |
Yes |
RequestThrottleException |
400 | The number of API requests has exceeded the maximum allowed API request throttling limit for the snapshot. | GetSnapshotBlock | PutSnapshotBlock |
Yes |
ValidationException with message "Failed to read block data" |
400 | The provided data block was not readable. | PutSnapshotBlock |
Yes |
ValidationException with any other message |
400 | The request syntax is malformed, or the input does not satisfy the constraints specified by the Amazon Web Service. | All APIs |
No |
ResourceNotFoundException |
404 | The specified snapshot ID does not exist. | All APIs |
No |
ConflictException |
409 | The specified client token was previously used in a similar request that had different request parameters. For more information, see Idempotency for StartSnapshot API. | StartSnapshot |
No |
AccessDeniedException |
403 | You do not have permission to perform the requested operation. | All APIs |
No |
ServiceQuotaExceededException |
402 | The request failed because fulfilling the request would exceed one or more dependent service quotas for your account. | All APIs |
No |
InvalidSignatureException |
403 | The request authorization signature has expired. You can retry the request only after refreshing the authorization signature. | All APIs |
No |