Working with the DynamoDB API - DynamoDB Applied Design Patterns - page 134

Client-side error with status code 400 - retry not
needed
First, we will see the errors that are caused due to invalid values in the request. So, even if
we retry it millions of times, it won't work.
AccessDeniedException
This is a usual authentication failure. The problem might be because of an invalid key ID
or value in a request.
ConditionalCheckFailedException
This error will provide the The conditional request failed error message.
This exception occurs when the specified (or expected) value of an attribute doesn't match
the value stored in the system. An example of this case is validating an e-mail during regis-
tration to a forum. During that time, if the e-mail ID already exists in the DynamoDB table,
we can throw this exception to fail the transaction.
IncompleteSignatureException
This error will be raised if one or more of the Signature parameters are missing. The er-
ror message shown by this error is The request signature does not con-
form to AWS standards .
LimitExceededException
This error will provide the Too many operations for a given subscriber
error message. This exception occurs in two cases: first, because of too many simultaneous
operations (more than 20 CREATING , DELETING , or UPDATING operations) and second,
because of too many active tables (greater than 250).
MissingAuthenticationTokenException
This error will be raised if the request doesn't include the required field or the x-amz-
security-token parameter. The error message shown by this error is Request
must contain a valid (registered) AWS Access Key ID .