AmazonServiceException: Unable to unmarshall exception response with the unmarshallers provided (Service.

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Exception in thread "main" com.amazonaws.AmazonServiceException: Unable to unmarshall exception response with the unmarshallers provided (Service: Status Code: 403; Error Code: InvalidSignatureException; Request ID: NiCd0BkFQ-FIC1Q7PqxxuT0qIkmepIRaviJM9o-Ig0ltWG0; Proxy: null).

we face AmazonServiceException when we tries to access a AWS service in AWS cloud from a external / third party java program, we often get AmazonServiceException. it means service is not available to u.


Solution:

There could be many reason for service non availability.
If you are getting HTTP 403 error code along with AmazonServiceException, it means the AccessKey and SecretKey you are using is not correct.
OR
Correct policy is not attached with the user.

Please cross the accessKeyID and secretAccessKey that you are using to access the AWS service and the policy attached with the user or user belongs to which group.

System.out.println("Connecting AWS Amazon  Glacier Service");
		String newValutName = "easycodeforallVault";
		String accessKeyID = KKY35*********JB37";// You get it form AWS Console /
		// You get it form AWS Console
		String secretAccessKey = "GGMOFS*******444******qdsc$$V";
		AWSCredentials awsCredentials = new BasicAWSCredentials(accessKeyID, secretAccessKey)

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