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AmazonServiceException provides callers several pieces of information that can be used to obtain more information about the error and why it occurred. In particular, the errorType field can be used to determine if the caller's request was invalid, or the service encountered an error on the server side while processing it.
For example, if a client is using an invalid AWS access key, the returned exception will indicate that there is an error in the request the caller is sending. Retrying that same request will *not* result in a successful response. The Client ErrorType indicates that there is a problem in the request the user is sending (ex: incorrect access keys, invalid parameter value, missing parameter, etc.), and that the caller must take some action to correct the request before it should be resent. Client errors are typically associated an HTTP error code in the 4xx range.
The Service ErrorType indicates that although the request the caller sent was valid, the service was unable to fulfill the request because of problems on the service's side. These types of errors can be retried by the caller since the caller's request was valid and the problem occurred while processing the request on the service side. Service errors will be accompanied by an HTTP error code in the 5xx range.
Finally, if there isn't enough information to determine who's fault the error response is, an Unknown ErrorType will be set.
errorTypeThe type of error represented by this exception (sender or receiver), indicating if this exception was the caller's fault or the service's fault.