ImportModuleError

I have a rather simple serverless config, with no other plugins, no package exclude patters, yet I get a ModuleImportError upon deployment. The only potential deviation from the most basic example in the README is that I’ve configured Serverless to build and deploy an image rather than a zip. Any ideas?

{
  "errorType": "Runtime.ImportModuleError",
  "errorMessage": "Error: Cannot find module 's_warmUpPluginWarmer'\nRequire stack:\n- /var/runtime/UserFunction.js\n- /var/runtime/index.js",
  "trace": [
    "Runtime.ImportModuleError: Error: Cannot find module 's_warmUpPluginWarmer'",
    "Require stack:",
    "- /var/runtime/UserFunction.js",
    "- /var/runtime/index.js",
    "    at _loadUserApp (/var/runtime/UserFunction.js:202:13)",
    "    at Object.module.exports.load (/var/runtime/UserFunction.js:242:17)",
    "    at Object.<anonymous> (/var/runtime/index.js:43:30)",
    "    at Module._compile (internal/modules/cjs/loader.js:1085:14)",
    "    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)",
    "    at Module.load (internal/modules/cjs/loader.js:950:32)",
    "    at Function.Module._load (internal/modules/cjs/loader.js:790:12)",
    "    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:76:12)",
    "    at internal/main/run_main_module.js:17:47"
  ]
}

My Serverless config:

provider:
  name: aws
  region: eu-west-1
  memorySize: 1024
  timeout: 900 #sec
  deploymentBucket:
    name: ${opt:stage}-smp-serverless-deployment
  iam:
    role: ${ssm:/${opt:stage}-lambda-serverless-role-arn}
  ecr:
    images:
      appimage:
        path: ./

plugins:
  - serverless-plugin-warmup

functions:
  main:
    name: ${opt:stage}-conv
    environment:
      INPUT_S3_BUCKET: ${ssm:/${opt:stage}-file-upload-bucket-name}
    image:
      name: appimage

custom:
  warmup:
    warmer:
      enabled: true
    package:
      events:
        - schedule: rate(10 minutes)
      concurrency: 10`

Many thanks in advance!

[brendenkrochko]

@juanjoDiaz Thanks for the prompt response. My mistake on the version number, that was a mistype on my end! 7.1.0 is the one I am on.

So I actually just got everything working on my end using what minu2020 had pasted above (adding in the package options to my config) on Feb 1, 2022. I’m still not entirely sure what the issue was, but everything seems to be alright now.

The warmup config that I am now using successfully is:

warmup:
  default:
    prewarm: true
    package:
      individually: true
      patterns:
        - "!../**"
        - "!../../**"
        - ./serverless_sdk/*
        - ./s_warmUpPluginDefault.js

[alanwilter]

Well, I was very sceptical it would work with docker package but hooray, it did!:

  warmup:
    default:
      prewarm: true
      enabled: true
      events:
        - schedule: cron(0/5 1-23 ? * MON-SUN *)
      concurrency: 5
      verbose: true
      logRetentionInDays: 14
      package:
        individually: true
        patterns:
          - "!../**"
          - "!../../**"
          - ./serverless_sdk/*
          - ./s_warmUpPluginDefault.js