DyanamoDB connection issue - aws-sdk for NodeJs

Question

While connecting to DynamoDB via aws-sdk for NodeJs, i'm seeing below issue:

> InvalidSignatureException: Credential should be scoped to a valid region, not 'eu-east-2'. 
    at Request.extractError (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/protocol/json.js:52:27)
    at Request.callListeners (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/sequential_executor.js:106:20)
    at Request.emit (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/sequential_executor.js:78:10)
    at Request.emit (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/request.js:686:14)
    at Request.transition (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/request.js:22:10)
    at AcceptorStateMachine.runTo (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/state_machine.js:14:12)
    at /Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/state_machine.js:26:10
    at Request. (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/request.js:38:9)
    at Request. (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/request.js:688:12)
    at Request.callListeners (/Users/saravanan_vij/Documents/Personal/GitHub/Backtester/node_modules/aws-sdk/lib/sequential_executor.js:116:18) {
  code: 'InvalidSignatureException',
  time: 2021-12-30T17:22:35.364Z,
  requestId: '3CT4LSCT0395369U3SVVNMV4B3VV4KQNSO5AEMVJF66Q9ASUAAJG',
  statusCode: 400,
  retryable: false,
  retryDelay: 24.638717702395528

I cannot believe that I'm not able to resolve this issue still after spending several hours on it and its weird that nobody else has faced or logged it. Or maybe I'm doing something wrong.

Here's the config code:

> AWS.config.update({
    region: DynamoDBConfig.region,
    endpoint: DynamoDBConfig.endpoint,
    accessKeyId: DynamoDBConfig.accessKeyId,//process.env.AWS_ACCESS_KEY_ID,
    secretAccessKey: DynamoDBConfig.secretAccessKey//process.env.AWS_SECRET_ACCESS_KEY
});

> const dynamodb = new AWS.DynamoDB({region: DynamoDBConfig.region});

Note: The same code is working fine on the localhost DynamoDB.

Accepted Answer

Hi, it looks like the issue is with the region code you're using. eu-east-2 isn't listed on our region list:

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html

Answer

It looks like you are using a region which does not exist. Check the value of your ```DynamoDBConfig.region``` and ensure it points to a region listed [here](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html#concepts-available-regions):

|Code | Region|
---|---
us-east-2| 	US East (Ohio)  |
us-east-1| 	US East (N. Virginia) 
us-west-1 | 	US West (N. California) 
us-west-2 | 	US West (Oregon) 
af-south-1 | 	Africa (Cape Town) 	
ap-east-1 | 	Asia Pacific (Hong Kong) 
ap-southeast-3 | 	Asia Pacific (Jakarta) 
ap-south-1 | 	Asia Pacific (Mumbai) 
ap-northeast-3 | 	Asia Pacific (Osaka) 
ap-northeast-2 | 	Asia Pacific (Seoul) 
ap-southeast-1 | 	Asia Pacific (Singapore) 
ap-southeast-2 | 	Asia Pacific (Sydney) 
ap-northeast-1|  	Asia Pacific (Tokyo) 
ca-central-1 | 	Canada (Central) 
eu-central-1|  	Europe (Frankfurt) 
eu-west-1 | 	Europe (Ireland) 
eu-west-2 | 	Europe (London) 
eu-south-1 | 	Europe (Milan) 
eu-west-3 | 	Europe (Paris) 	
eu-north-1|  	Europe (Stockholm) 	
me-south-1 | 	Middle East (Bahrain) 	
sa-east-1 | 	South America (São Paulo)

Answer

Hi,

`InvalidSignatureException` error is when your credentials for the IAM user may not have the right DynamoDB actions for that DynamoDB table or IAM user or for that specific region it is not authorised. As you have mentioned, on localhost it is working recheck the DynamoDB table or region it is using.

Answer

the issue was occurring because of the typo in the region where I had this: 'eu-east-2' instead of this: ''us-east-2'

Code	Region
us-east-2	US East (Ohio)
us-east-1	US East (N. Virginia)
us-west-1	US West (N. California)
us-west-2	US West (Oregon)
af-south-1	Africa (Cape Town)
ap-east-1	Asia Pacific (Hong Kong)
ap-southeast-3	Asia Pacific (Jakarta)
ap-south-1	Asia Pacific (Mumbai)
ap-northeast-3	Asia Pacific (Osaka)
ap-northeast-2	Asia Pacific (Seoul)
ap-southeast-1	Asia Pacific (Singapore)
ap-southeast-2	Asia Pacific (Sydney)
ap-northeast-1	Asia Pacific (Tokyo)
ca-central-1	Canada (Central)
eu-central-1	Europe (Frankfurt)
eu-west-1	Europe (Ireland)
eu-west-2	Europe (London)
eu-south-1	Europe (Milan)
eu-west-3	Europe (Paris)
eu-north-1	Europe (Stockholm)
me-south-1	Middle East (Bahrain)
sa-east-1	South America (São Paulo)

DyanamoDB connection issue - aws-sdk for NodeJs

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