AWS AppSync Subscriptions Not Triggering on DynamoDB Stream Updates
I'm stuck trying to I've encountered a strange issue with I'm facing an issue where my GraphQL subscriptions in AWS AppSync are not triggering updates when changes are made to my DynamoDB table. I'm using the AWS Amplify library (version 4.3.0) to manage my GraphQL operations. My setup involves a DynamoDB table that has a stream enabled, and I've configured it to trigger an AWS Lambda function that publishes events to AppSync. However, when I update an item in the table, the subscription in my client application doesn't receive the update. Here's a simplified version of the Lambda function I'm using to publish updates to AppSync: ```javascript const AWS = require('aws-sdk'); const appsync = new AWS.AppSync({apiVersion: '2017-07-25'}); exports.handler = async (event) => { const updates = event.Records.map(record => { return { id: record.dynamodb.Keys.id.S, newValue: record.dynamodb.NewImage.newValue.S }; }); const mutation = `mutation UpdateItems($input: UpdateInput!) { updateItem(input: $input) { id newValue } }`; for (const update of updates) { const params = { query: mutation, variables: { input: update } }; await appsync.graphql(params).promise(); } }; ``` On the client side, I have set up the subscription like this: ```javascript import { API, graphqlOperation } from 'aws-amplify'; import { onUpdateItem } from './graphql/subscriptions'; const subscribeToUpdates = () => { const subscription = API.graphql(graphqlOperation(onUpdateItem)).subscribe({ next: (data) => { console.log('Data received:', data); }, error: (error) => { console.error('Subscription error:', error); } }); }; ``` I've confirmed that the DynamoDB stream is active and that the Lambda function is being invoked upon updates, but there are no logs in CloudWatch for the AppSync mutation, which makes me think the issue lies in how I'm publishing the mutation or how AppSync is set up. Could there be a specific configuration in AppSync that I'm missing, or perhaps an issue with the way I'm handling the DynamoDB stream events? Any insights would be greatly appreciated! I'm working on a desktop app that needs to handle this. I recently upgraded to Javascript 3.9. Thanks, I really appreciate it!