MacOS 10.14.6 Mojave.
Node v10.15.3
LocalStack - docker image 0.10.4

When invoking a Lambda from Node.js code.


    const lambda = new Aws.Lambda(creds);
    
    const payload = {};
    
    const clientContext = {
        invokedFunctionArn: this._workerArn
    };
    
    const params = {
        FunctionName: this._workerArn,
        InvocationType: "RequestResponse", // "DryRun",
        LogType: 'Tail', // "None", "Tail"
        ClientContext: JSON.stringify(clientContext),
        Payload: JSON.stringify(payload)
    };
    
    console.log(`DEBUG: Executing lambda ${JSON.stringify(params)}`);
    
    lambda.invoke(params, function (err, data) {
        console.log(`DEBUG: Printing lambda return arguments`);
        console.log(JSON.stringify(arguments));
        console.log(data.LogResult);
    });```
DEBUG: Printing lambda return arguments
{"0":null,"1":{"StatusCode":200,"Payload":"null"}}
undefined
```

Expecting to see the Lambda execution log in `data.LogResult`, but no such object returned,
yet Localstack Cloudwatch logs recorded the execution logs correctly.


```
EVENTS	75	1570381308926.664	+51733/05/27/[$LATEST]629146bb	START RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3 Version: $LATEST	1570381306039
EVENTS	76	1570381308926.664	+51733/05/27/[$LATEST]629146bb	2019-10-06T17:01:47.924Z	dbd86068-78c8-1a62-29ca-9c0a4a8580c3	INFO	DEBUG: LOCALSTACK_HOSTNAME=172.17.0.1	1570381306520
...
EVENTS	79	1570381308926.664	+51733/05/27/[$LATEST]629146bb	END RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	1570381307961
EVENTS	80	1570381308926.664	+51733/05/27/[$LATEST]629146bb	REPORT RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	Duration: 16.05 ms	Billed Duration: 100 ms	Memory Size: 1536 MB	Max Memory Used: 57 MB		1570381308442
```

What I'm missing? Why it doesn't return logs on invoke?

Thanks



┆Issue is synchronized with this [Jira Bug](https://localstack.atlassian.net/browse/LOC-125) by [Unito](https://www.unito.io/learn-more)

dynamodb_client = aws_stack.connect_to_service('dynamodb')
        dynamodb_client.delete_table(TableName=table_name)
    def test_lambda_start_stepfunctions_execution(self):
        function_name = '{}-{}'.format(TEST_LAMBDA_FUNCTION_PREFIX, short_uid())
        resource_lambda_name = '{}-{}'.format(TEST_LAMBDA_FUNCTION_PREFIX, short_uid())
        state_machine_name = 'state-machine-{}'.format(short_uid())
        testutil.create_lambda_function(handler_file=TEST_LAMBDA_START_EXECUTION_FILE,
                                        func_name=function_name,
                                        runtime=LAMBDA_RUNTIME_PYTHON36)
        testutil.create_lambda_function(handler_file=TEST_LAMBDA_ECHO_FILE,
                                        func_name=resource_lambda_name,
                                        runtime=LAMBDA_RUNTIME_PYTHON36)
        state_machine_def = {
            'StartAt': 'step1',
            'States': {
                'step1': {
                    'Type': 'Task',
                    'Resource': aws_stack.lambda_function_arn(resource_lambda_name),
                    'ResultPath': '$.result_value',
                    'End': True
                }
            }
        }
        sfn_client = aws_stack.connect_to_service('stepfunctions')
        rs = sfn_client.create_state_machine(
            name=state_machine_name,
            definition=json.dumps(state_machine_def),
            roleArn=aws_stack.role_arn('sfn_role')
        )
        sm_arn = rs['stateMachineArn']