AWS Lambda function handler missing

Question

I created the following lambda function and its given me the following error. I am new to Python and I dont think there's anything missing in the function. can someone please help to make this function work? Thanks

import logging
import json
import boto3

client = boto3.client('workspaces')

def handler(event, context):
    response = create_workspace()
    return event
    
def create_workspace():    
    response = client.create_workspaces(
        Workspaces=[
            {
                'DirectoryId': 'd-9767328a34',
                'UserName': 'Ken',
                'BundleId': 'wsb-6cdbk8901',
                'WorkspaceProperties': {
                    'RunningMode': 'AUTO_STOP'
                },
                'Tags': [
                    {
                        'Key': 'Name',
                        'Value': 'CallCentreProvisioned'
                    },
                ]
            },
        ]
    )

Execution result

{
  "errorMessage": "Handler 'lambda_handler' missing on module 'lambda_function'",
  "errorType": "Runtime.HandlerNotFound",
  "requestId": "a09fd219-b262-4226-a04b-4d26c1b7281f",
  "stackTrace": []
}

The name of the handler in the function config needs to match the function name in the code. Looks like handler != lambda_handler. — luk2302
– luk2302, Commented Jan 17, 2022 at 13:38
Unrelated, but a Lambda function handler typically returns a packaged response, not the the original event that triggered the Lambda function. — jarmod
– jarmod, Commented Jan 17, 2022 at 14:54

theherk · Accepted Answer · 2022-01-17 16:10:56Z

3

Very simple. Rename handler to lambda_handler, or change your lambda configuration to use the handler called handler rather than lambda_handler. There were comments that mentioned this, but no simple answer given.

There is no good reason to nest the function as the other answer seems to suggest.

answered Jan 17, 2022 at 16:10

theherk

7,6173 gold badges32 silver badges62 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Shootnik · Accepted Answer · 2022-01-17 14:28:30Z

You should have this syntax:

def handler_name(event, context): 
    // paste your code here
    return some_value

I think you should be like this. And look at the Naming paragraph.:

import logging
import json
import boto3

def lambda_handler(event, context):

    client = boto3.client('workspaces')
    
    response = create_workspace()
    return event
    
    def create_workspace():    
        response = client.create_workspaces(
            Workspaces=[
                {
                    'DirectoryId': 'd-9767328a34',
                    'UserName': 'Ken',
                    'BundleId': 'wsb-6cdbk8901',
                    'WorkspaceProperties': {
                        'RunningMode': 'AUTO_STOP'
                    },
                    'Tags': [
                        {
                            'Key': 'Name',
                            'Value': 'CallCentreProvisioned'
                        },
                    ]
                },
            ]
        )

Collectives™ on Stack Overflow

AWS Lambda function handler missing

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related