Skip to main content


Middleware for handling partially failed SQS batches.


To install this middleware you can use NPM:

npm install --save @middy/sqs-partial-batch-failure


  • AwsClient (object) (default AWS.SQS): AWS.SQS class constructor (e.g. that has been instrumented with AWS XRay). Must be from aws-sdk v2.
  • awsClientOptions (object) (optional): Options to pass to AWS.SQS class constructor.
  • awsClientAssumeRole (string) (optional): Internal key where role tokens are stored. See @middy/sts on to set this.
  • awsClientCapture (function) (optional): Enable XRay by passing captureAWSClient from aws-xray-sdk in.
  • disablePrefetch (boolean) (default false): On cold start requests will trigger early if they can. Setting awsClientAssumeRole disables prefetch.


  • Lambda is required to have IAM permission for sqs:DeleteMessage

Sample usage

import middy from '@middy/core'
import sqsBatch from '@middy/sqs-partial-batch-failure'

const lambdaHandler = (event, context) => {
const recordPromises = (record, index) => {
/* Custom message processing logic */
return record
return Promise.allSettled(recordPromises)

export const handler = middy(lambdaHandler)