Our AWS error library covers high-impact exceptions across S3, IAM, EC2, Lambda, and DynamoDB with service-specific diagnostics. Each entry is written for incident workflows using RequestId and HostId evidence, policy scope checks, and quota or regional constraint analysis.
These are the highest-signal AWS pages for common production failures and the best first routes for internal linking and early user navigation.
Priority guide
Access Denied
Fix AWS AccessDenied with policy-layer diagnostics across IAM, SCP, resource policies, and trust rules to restore least-privilege access safely.
->Priority guide
Authentication Failure
Fix AWS AuthFailure: Learn the difference between authentication and authorization, validate IAM access keys, and resolve credential rotation sync iss...
->Priority guide
Throttling Exception
Fix AWS ThrottlingException with adaptive rate control, exponential backoff with jitter, and quota-aware traffic shaping for stable API behavior.
->When you need broader context, move from provider-specific pages into the matching error category or incident playbook before changing production behavior.
Showing 46-60 of 100.
AWS InvalidParameter means the request is syntactically readable, but one or more supplied parameters violate the target operation contract, scope rules, or service-specific request shape.
AWS InvalidParameterCombination means parameters that must not be used together were used together, or a required companion parameter is missing.
AWS InvalidParameterValue means the request reached AWS, but one parameter value violates the service contract, allowed range, naming rule, resource format, or operation-specific constraint.
AWS InvalidParameterValueException means one of the parameters in the Lambda Invoke request is not valid (HTTP 400).
Amazon S3 InvalidRange means a `GetObject` byte range request cannot be satisfied by the current object length or selected object version.
Amazon S3 InvalidRequest means S3 received and parsed the request, but rejected its operation semantics, endpoint mode, headers, or bucket context as incompatible.
AWS InvalidRequestContentException means the Lambda invoke request body cannot be parsed as JSON, or a request header value is invalid (HTTP 400).
AWS InvalidSignatureException usually means the request signature or signing envelope is invalid for the target service. In many services this points to malformed SigV4 inputs, but some service-specific APIs can also use it for expired or otherwise unusable signatures.
AWS InvalidSnapshot.NotFound means the specified EBS snapshot does not exist for the account and region context of the request.
AWS InvalidStorageClass means the requested Amazon S3 storage class value is not valid for that operation or context (HTTP 400).
Amazon EC2 returns `InvalidSubnetID.NotFound` when the requested subnet ID cannot be found in the account-region context for the operation.
AWS InvalidUserID.Malformed means owner or executableBy identifiers in EC2 describe requests are invalid. In Amazon EC2, this error returns HTTP 400.
AWS InvalidViewerCertificate (Cloud Front Invalid Viewer Certificate) means the viewer certificate settings are invalid. In the CloudFront API, this error returns HTTP 400.
AWS ItemCollectionSizeLimitExceededException means a DynamoDB item collection exceeded the 10 GB limit for a local secondary index partition key (HTTP 400).
AWS LimitExceeded means the IAM request exceeds current account limits for identity objects or attachment dimensions (HTTP 409).