"endpoint" configuration parameter is ignored by DynamoDBClient

Describe the bug

Trying to migrate to aws-sdk 3 from aws-sdk 2. We are using endpoint configuration parameter to have the Dynamo client talk to a local instance of Dynamo for unit tests, but the SDK ignores it, and keeps trying to reach the remote Dynamo, resulting in an error ExpiredToken: The security token included in the request is expired

Your environment

Node 12.20.1, MacOS Catalina

SDK version number

“@aws-sdk/client-dynamodb”: “3.16.0”

Is the issue in the browser/Node.js/ReactNative?

Node.js

Details of the browser/Node.js/ReactNative version

Node 12.20.1

Steps to reproduce

const {DynamoDBClient, BatchWriteItemCommand} = require('@aws-sdk/client-dynamodb');
const {marshall} = require('@aws-sdk/util-dynamodb');

(async () => {
  const dynamoClient = new DynamoDBClient({endpoint: "http://localhost:2348"});
  const ids = ['1232'];
  const params = {
    RequestItems: {
      'mytable': ids.map((id) => {
        return {
          DeleteRequest: {
            Key: marshall({id}),
          },
        };
      }),
    },
  };
const command = new BatchWriteItemCommand(params);
await dynamoClient.send(command);
})().catch(e => {
  console.log(e, 'error');
})

Observed behavior

AWS SDK client tries to send requests to real Dynamo AWS.

Expected behavior

AWS SDK client should be sending requests to local Dynamo instance.

[gornostal]

@frannav ah, I remember – it was an issue related to nestjs dependency injection. I’ve misconfigured it and it would create an SNSClient instance without passing the config object in there.

[trivikr]

Revisiting during review meeting. The action item would be to check if endpoint which contains localhost is overridden in any middleware.