Cannot find module 'ajv/dist/compile/codegen'

Not sure if this is something that just can’t be helped, but it seems that if a NodeJS project has a dependency on ajv^6 it’ll cause the packaging step to fail. I believe this was caused by the bump to ajv^7. I know that many projects still depend on the earlier version, so it might break a lot of projects.

Steps to reproduce:

1. Create a new project using sls init
2. Select NodeJS project
3. Install ajv^6 via npm i ajv@^6
4. Execute sls package

serverless.yml

# Welcome to Serverless!
#
# This file is the main config file for your service.
# It's very minimal at this point and uses default values.
# You can always add more config options for more control.
# We've included some commented out config examples here.
# Just uncomment any of them to get that config option.
#
# For full config options, check the docs:
#    docs.serverless.com
#
# Happy Coding!

service: test
# app and org for use with dashboard.serverless.com
#app: your-app-name
#org: your-org-name

# You can pin your service to only deploy with a specific Serverless version
# Check out our docs for more details
frameworkVersion: '2'

provider:
  name: aws
  runtime: nodejs12.x

# you can overwrite defaults here
#  stage: dev
#  region: us-east-1

# you can add statements to the Lambda function's IAM Role here
#  iamRoleStatements:
#    - Effect: "Allow"
#      Action:
#        - "s3:ListBucket"
#      Resource: { "Fn::Join" : ["", ["arn:aws:s3:::", { "Ref" : "ServerlessDeploymentBucket" } ] ]  }
#    - Effect: "Allow"
#      Action:
#        - "s3:PutObject"
#      Resource:
#        Fn::Join:
#          - ""
#          - - "arn:aws:s3:::"
#            - "Ref" : "ServerlessDeploymentBucket"
#            - "/*"

# you can define service wide environment variables here
#  environment:
#    variable1: value1

# you can add packaging information here
#package:
#  include:
#    - include-me.js
#    - include-me-dir/**
#  exclude:
#    - exclude-me.js
#    - exclude-me-dir/**

functions:
  hello:
    handler: handler.hello
#    The following are a few example events you can configure
#    NOTE: Please make sure to change your handler code to work with those events
#    Check the event documentation for details
#    events:
#      - http:
#          path: users/create
#          method: get
#      - websocket: $connect
#      - s3: ${env:BUCKET}
#      - schedule: rate(10 minutes)
#      - sns: greeter-topic
#      - stream: arn:aws:dynamodb:region:XXXXXX:table/foo/stream/1970-01-01T00:00:00.000
#      - alexaSkill: amzn1.ask.skill.xx-xx-xx-xx
#      - alexaSmartHome: amzn1.ask.skill.xx-xx-xx-xx
#      - iot:
#          sql: "SELECT * FROM 'some_topic'"
#      - cloudwatchEvent:
#          event:
#            source:
#              - "aws.ec2"
#            detail-type:
#              - "EC2 Instance State-change Notification"
#            detail:
#              state:
#                - pending
#      - cloudwatchLog: '/aws/lambda/hello'
#      - cognitoUserPool:
#          pool: MyUserPool
#          trigger: PreSignUp
#      - alb:
#          listenerArn: arn:aws:elasticloadbalancing:us-east-1:XXXXXX:listener/app/my-load-balancer/50dc6c495c0c9188/
#          priority: 1
#          conditions:
#            host: example.com
#            path: /hello

#    Define function environment variables here
#    environment:
#      variable2: value2

# you can add CloudFormation resource templates here
#resources:
#  Resources:
#    NewResource:
#      Type: AWS::S3::Bucket
#      Properties:
#        BucketName: my-new-bucket
#  Outputs:
#     NewOutput:
#       Description: "Description for the output"
#       Value: "Some output value"

sls package output

Serverless: Running "serverless" installed locally (in service node_modules)
 
  Error --------------------------------------------------
 
  Error: Cannot find module 'ajv/dist/compile/codegen'
  Require stack:
  - /tmp/test/node_modules/ajv-keywords/dist/definitions/typeof.js
  - /tmp/test/node_modules/ajv-keywords/dist/keywords/typeof.js
  - /tmp/test/node_modules/ajv-keywords/dist/keywords/index.js
  - /tmp/test/node_modules/ajv-keywords/dist/index.js
  - /tmp/test/node_modules/serverless/lib/classes/ConfigSchemaHandler/index.js
  - /tmp/test/node_modules/serverless/lib/Serverless.js
  - /usr/local/lib/node_modules/serverless/lib/Serverless.js
  - /usr/local/lib/node_modules/serverless/scripts/serverless.js
  - /usr/local/lib/node_modules/serverless/bin/serverless.js
      at Function.Module._resolveFilename (internal/modules/cjs/loader.js:957:15)
      at Function.Module._load (internal/modules/cjs/loader.js:840:27)
      at Module.require (internal/modules/cjs/loader.js:1019:19)
      at require (internal/modules/cjs/helpers.js:77:18)
      at Object.<anonymous> (/tmp/test/node_modules/ajv-keywords/src/definitions/typeof.ts:2:1)
      at Module._compile (internal/modules/cjs/loader.js:1133:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
      at Module.load (internal/modules/cjs/loader.js:977:32)
      at Function.Module._load (internal/modules/cjs/loader.js:877:14)
      at Module.require (internal/modules/cjs/loader.js:1019:19)
      at require (internal/modules/cjs/helpers.js:77:18)
      at Object.<anonymous> (/tmp/test/node_modules/ajv-keywords/src/keywords/typeof.ts:2:1)
      at Module._compile (internal/modules/cjs/loader.js:1133:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
      at Module.load (internal/modules/cjs/loader.js:977:32)
      at Function.Module._load (internal/modules/cjs/loader.js:877:14)
      at Module.require (internal/modules/cjs/loader.js:1019:19)
      at require (internal/modules/cjs/helpers.js:77:18)
      at Object.<anonymous> (/tmp/test/node_modules/ajv-keywords/src/keywords/index.ts:2:1)
      at Module._compile (internal/modules/cjs/loader.js:1133:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
      at Module.load (internal/modules/cjs/loader.js:977:32)
      at Function.Module._load (internal/modules/cjs/loader.js:877:14)
      at Module.require (internal/modules/cjs/loader.js:1019:19)
      at require (internal/modules/cjs/helpers.js:77:18)
      at Object.<anonymous> (/tmp/test/node_modules/ajv-keywords/src/index.ts:3:1)
      at Module._compile (internal/modules/cjs/loader.js:1133:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:10)
      at Module.load (internal/modules/cjs/loader.js:977:32)
      at Function.Module._load (internal/modules/cjs/loader.js:877:14)
      at Module.require (internal/modules/cjs/loader.js:1019:19)
      at require (internal/modules/cjs/helpers.js:77:18)
      at ConfigSchemaHandler.validateConfig (/tmp/test/node_modules/serverless/lib/classes/ConfigSchemaHandler/index.js:102:5)
      at Service.validate (/tmp/test/node_modules/serverless/lib/classes/Service.js:222:41)
      at /tmp/test/node_modules/serverless/lib/Serverless.js:200:49
      at tryCatcher (/tmp/test/node_modules/bluebird/js/release/util.js:16:23)
      at Promise._settlePromiseFromHandler (/tmp/test/node_modules/bluebird/js/release/promise.js:547:31)
      at Promise._settlePromise (/tmp/test/node_modules/bluebird/js/release/promise.js:604:18)
      at Promise._settlePromise0 (/tmp/test/node_modules/bluebird/js/release/promise.js:649:10)
      at Promise._settlePromises (/tmp/test/node_modules/bluebird/js/release/promise.js:729:18)
      at _drainQueueStep (/tmp/test/node_modules/bluebird/js/release/async.js:93:12)
      at _drainQueue (/tmp/test/node_modules/bluebird/js/release/async.js:86:9)
      at Async._drainQueues (/tmp/test/node_modules/bluebird/js/release/async.js:102:5)
      at Immediate.Async.drainQueues [as _onImmediate] (/tmp/test/node_modules/bluebird/js/release/async.js:15:14)
      at processImmediate (internal/timers.js:456:21)
      at process.topLevelDomainCallback (domain.js:137:15)
 
     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com
 
  Your Environment Information ---------------------------
     Operating System:          linux
     Node Version:              12.16.3
     Framework Version:         2.11.1 (local)
     Plugin Version:            4.1.2
     SDK Version:               2.3.2
     Components Version:        3.3.0

Installed version

Serverless: Running "serverless" installed locally (in service node_modules)
Framework Core: 2.18.0 (local)
Plugin: 4.4.2
SDK: 2.3.2
Components: 3.4.6

[jakoritarleite]

I was facing the same issue with, I temporarily solved it by installing ajv@7.0.3 and now it’s added as dependency on my package.json:

  ...
  "devDependencies": {
    "serverless-step-functions": "^2.27.1"
  },
  "dependencies": {
    "ajv": "^7.0.3",
    "serverless": "^2.18.0",
    "serverless-pseudo-parameters": "^2.5.0",
    "serverless-python-requirements": "^5.1.0"
  }

It’s just a “workaround” for those who need to deploy their applications, and problably will be fixed asap. By the way I’m running the serverless v2.18.0, npm v6.14.10 and node v10.19.0.

[FergusMcGlynn]

I think there is something funny about version 2.18.0 of serverless. 3 separate users have posted here that they have run into the error Cannot find module 'ajv/dist/compile/codegen' since upgrading to 2.18.0, and they didn’t have any errors with 2.17.0. Also, in the example I described in an earlier post, upgrading to 2.18.0 caused the error in one project but not in the other. If this were a straight up bug in npm v6, wouldn’t both of them fail?

My projects don’t have a direct dependency on ajv either.