Cannot use aws component with config using sdk v3.668.0 : Can not add runtime configuration property: \"$source\". Configuration objects are immutable unless ALLOW_CONFIG_MUTATIONS is set

[Thybat]

Checkboxes for prior research

• I've gone through Developer Guide and API reference
• I've checked AWS Forums and StackOverflow.
• I've searched for previous similar issues and didn't find any solution.

Describe the bug

This issue happens when trying to access an aws component using 'config' lib to create it with the constructor.

It produces the following error : "Can not add runtime configuration property: "$source". Configuration objects are immutable unless ALLOW_CONFIG_MUTATIONS is set."

Config version is 3.3.12

SDK version is 3.668.0

This is working fine with 3.654.0 version of the SDK

Using the object directly works fine

Regression Issue

• Select this option if this issue appears to be a regression.

SDK version number

"@aws-sdk/client-dynamodb": "3.668.0", "@aws-sdk/client-sqs": "3.668.0", "@aws-sdk/lib-dynamodb": "3.668.0"

Which JavaScript Runtime is this issue in?

Node.js

Details of the browser/Node.js/ReactNative version

v22.11.0

Reproduction Steps

config dev

"aws": {
        "region": "eu-west-1",
        "endpoint": "http://localhost:4569",
        "credentials": {
          "accessKeyId": "d",
          "secretAccessKey": "d"
        }
    }

Repo.ts

import { Service } from 'typedi';
import {
  DeleteCommand, DynamoDBDocumentClient,
} from '@aws-sdk/lib-dynamodb';
import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
import config from 'config';


@Service()
export default class Repo{
  private dynamodbClient: DynamoDBDocumentClient;
  private TABLE_NAME = `ddb-${process.env.NODE_ENV}`;

  constructor() {
    awsConfig = config.get('aws');
    this.dynamodbClient = DynamoDBDocumentClient.from(new DynamoDBClient(awsConfig));
  }
  async get(test: string): Promise<object | undefined> {
    const getQuery = new GetCommand({ TableName: this.TABLE_NAME, Key: { test } });
    return data.Item;
}
}

Service.ts
import Repo from '../repositories/Repo';
export default class t { 
constructor(
  private repo: Repo,
) {}
public async test(bodyRequest: any, headers: any): Promise<any> {
  const test: any = await this.repo.getByChecksum('123');
}
}

Observed Behavior

An error is produced when trying to acces the DB.

Expected Behavior

No error using config.

Possible Solution

Using DynamoDBDocumentClient.from(new DynamoDBClient(JSON.parse(JSON.stringify(config.get('aws')))) fix the issue.

Additional Information/Context

No response

[aBurmeseDev]

Hi @Thybat - thanks for reaching out.

A few questions to better understand your issue:

• how's this config package installed?

"Config version is 3.3.12"

• how's your SDK configured? Here's docs for your reference: https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/configuring-the-jssdk.html
• can you share your full error log without any sensitive info?
• what's the use case for calling both clients?

this.dynamodbClient = DynamoDBDocumentClient.from(new DynamoDBClient(awsConfig));

[kuhe]

The configuration or credentials object passed into the AWS SDK clients should not be immutable, and this is not supported in the AWS SDK interface.

The client.config field is marked readonly in the TypeScript interface, but not recursively readonly.

It was only coincidental that it previously worked.

[Thybat]

Okay thank you guys @kuhe & @aBurmeseDev for the answer.

I'll try to find another way to pass the config locally.