[ERROR] Runtime.ImportModuleError: Unable to import module

[debojit777]

Hello SAM + LAMBDA users,

I am facing below issue in both Local scenario and after deploying app to aws and hitting test endpoint via API Gateway

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Error info :

Steps

• Build & Start:

sam build --use-container
sam local start-api --env-vars test/sample/integration_test/environment.json

• curl Get :

curl http://127.0.0.1:3000/sample

• Getting below error

START RequestId: 156a4eec-0ec1-182f-d06e-04bfce652b1f Version: $LATEST
[ERROR] Runtime.ImportModuleError: Unable to import module 'list_handler': No module named 'src'
END RequestId: 156a4eec-0ec1-182f-d06e-04bfce652b1f
REPORT RequestId: 156a4eec-0ec1-182f-d06e-04bfce652b1f  Init Duration: 537.49 ms    Duration: 4.27 ms   Billed Duration: 100 ms Memory Size: 1024 MB    Max Memory Used: 32 MB  
Lambda returned empty body!
Invalid API Gateway Response Keys: {'errorType', 'errorMessage'} in {'errorType': 'Runtime.ImportModuleError', 'errorMessage': "Unable to import module 'list_handler': No module named 'src'"}
<class 'samcli.local.apigw.local_apigw_service.LambdaResponseParseException'>

---

SAM :

sam --version
SAM CLI, version 0.48.0

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OS: MAC

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Details :

• Project structure:

.
├── README.md
├── api-event.json
├── environment.json
├── events
│   └── event.json
├── src
│   └── sample
│       ├── handler
│       │   ├── create_handler.py
│       │   ├── get_handler.py
│       │   ├── list_handler.py
│       │   ├── requirements.txt
│       └── helper
│           ├── dynamodb_helper.py
│           └── logging_helper.py
├── template.yaml
└── test
    └── sample
        ├── integration_test
        │   ├── api_tests.py
        │   └── environment.json
        ├── test_helper.py
        └── unit_test

• template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
sample-sam-app

  SAM Template for sample-sam-app

Globals:
  Function:
    Timeout: 20
    MemorySize: 1024
    Environment:
      Variables:
        TABLE_NAME: !Ref SampleTable
        APPLICATION_NAME: "SAMPLE"

Resources:
  CreateFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: src/sample/handler
      Handler: create_handler.lambda_handler
      Runtime: python3.7
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref SampleTable
      Events:
        Create:
          Type: Api 
          Properties:
            Path: /sample
            Method: post

  GetFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: src/sample/handler
      Handler: get_handler.lambda_handler
      Runtime: python3.7
      Policies:
        - DynamoDBReadPolicy:
            TableName: !Ref SampleTable
      Events:
        Get:
          Type: Api 
          Properties:
            Path: /sample/{data_id}
            Method: get

  ListFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: src/sample/handler
      Handler: list_handler.lambda_handler
      Runtime: python3.7
      Policies:
        - DynamoDBReadPolicy:
            TableName: !Ref SampleTable
      Events:
        Get:
          Type: Api 
          Properties:
            Path: /sample
            Method: get

  SampleTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: sample
      AttributeDefinitions:
        - AttributeName: user_id
          AttributeType: S
        - AttributeName: data_id
          AttributeType: S
      KeySchema:
        - AttributeName: user_id
          KeyType: HASH
        - AttributeName: data_id
          KeyType: RANGE
      BillingMode: PAY_PER_REQUEST 

Outputs:
    CreateFunction:
      Description: "Create Lambda Function ARN"
      Value: !GetAtt CreateFunction.Arn

    GetFunction:
      Description: "Get Lambda Function ARN"
      Value: !GetAtt GetFunction.Arn

    ListFunction:
      Description: "List Lambda Function ARN"
      Value: !GetAtt ListFunction.Arn

• docker doesnt show sam-app :

docker ps

CONTAINER ID        IMAGE                   COMMAND                  CREATED             STATUS              PORTS                    NAMES
2e45a561d2ab        amazon/dynamodb-local   "java -jar DynamoDBL…"   19 minutes ago      Up 19 minutes       0.0.0.0:8000->8000/tcp   romantic_mahavira

[BaibhavVishal123]

Have you run mvn package

Class cant' be found as jar file to be deployed in AWS lambda or Locally is not there.