Data in lambda event is not persistent





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0















I want to pass some data from one lambda function to the other for which I am using lambda 'events'.



First lambda Function -



event['data'] = "value"
return event


Second Lambda Function -



def lambda_handler(event,context):
value_of_data = event['data']


This works correctly sometimes and sometimes it gives the following error -



Error

KeyError
Cause
{
"errorMessage": "'data'",
"errorType": "KeyError",
"stackTrace": [
[
"/var/task/lambda_function.py",
276,
"lambda_handler",
"event_return = get_status(event)"
"value_of_data = event['data']"
]
]
}









share|improve this question




















  • 1





    Could you confirm how you're pass data from one lambda to another?

    – thomasmichaelwallace
    Nov 22 '18 at 9:25











  • @thomasmichaelwallace Using 'event'.

    – TeeKay
    Nov 22 '18 at 9:34











  • As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

    – thomasmichaelwallace
    Nov 22 '18 at 9:39











  • @thomasmichaelwallace They are connected by step functions

    – TeeKay
    Nov 22 '18 at 9:46











  • Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

    – thomasmichaelwallace
    Nov 22 '18 at 11:57


















0















I want to pass some data from one lambda function to the other for which I am using lambda 'events'.



First lambda Function -



event['data'] = "value"
return event


Second Lambda Function -



def lambda_handler(event,context):
value_of_data = event['data']


This works correctly sometimes and sometimes it gives the following error -



Error

KeyError
Cause
{
"errorMessage": "'data'",
"errorType": "KeyError",
"stackTrace": [
[
"/var/task/lambda_function.py",
276,
"lambda_handler",
"event_return = get_status(event)"
"value_of_data = event['data']"
]
]
}









share|improve this question




















  • 1





    Could you confirm how you're pass data from one lambda to another?

    – thomasmichaelwallace
    Nov 22 '18 at 9:25











  • @thomasmichaelwallace Using 'event'.

    – TeeKay
    Nov 22 '18 at 9:34











  • As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

    – thomasmichaelwallace
    Nov 22 '18 at 9:39











  • @thomasmichaelwallace They are connected by step functions

    – TeeKay
    Nov 22 '18 at 9:46











  • Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

    – thomasmichaelwallace
    Nov 22 '18 at 11:57














0












0








0








I want to pass some data from one lambda function to the other for which I am using lambda 'events'.



First lambda Function -



event['data'] = "value"
return event


Second Lambda Function -



def lambda_handler(event,context):
value_of_data = event['data']


This works correctly sometimes and sometimes it gives the following error -



Error

KeyError
Cause
{
"errorMessage": "'data'",
"errorType": "KeyError",
"stackTrace": [
[
"/var/task/lambda_function.py",
276,
"lambda_handler",
"event_return = get_status(event)"
"value_of_data = event['data']"
]
]
}









share|improve this question
















I want to pass some data from one lambda function to the other for which I am using lambda 'events'.



First lambda Function -



event['data'] = "value"
return event


Second Lambda Function -



def lambda_handler(event,context):
value_of_data = event['data']


This works correctly sometimes and sometimes it gives the following error -



Error

KeyError
Cause
{
"errorMessage": "'data'",
"errorType": "KeyError",
"stackTrace": [
[
"/var/task/lambda_function.py",
276,
"lambda_handler",
"event_return = get_status(event)"
"value_of_data = event['data']"
]
]
}






amazon-web-services events aws-lambda aws-step-functions






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 '18 at 11:56









thomasmichaelwallace

2,8501920




2,8501920










asked Nov 22 '18 at 8:39









TeeKayTeeKay

248427




248427








  • 1





    Could you confirm how you're pass data from one lambda to another?

    – thomasmichaelwallace
    Nov 22 '18 at 9:25











  • @thomasmichaelwallace Using 'event'.

    – TeeKay
    Nov 22 '18 at 9:34











  • As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

    – thomasmichaelwallace
    Nov 22 '18 at 9:39











  • @thomasmichaelwallace They are connected by step functions

    – TeeKay
    Nov 22 '18 at 9:46











  • Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

    – thomasmichaelwallace
    Nov 22 '18 at 11:57














  • 1





    Could you confirm how you're pass data from one lambda to another?

    – thomasmichaelwallace
    Nov 22 '18 at 9:25











  • @thomasmichaelwallace Using 'event'.

    – TeeKay
    Nov 22 '18 at 9:34











  • As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

    – thomasmichaelwallace
    Nov 22 '18 at 9:39











  • @thomasmichaelwallace They are connected by step functions

    – TeeKay
    Nov 22 '18 at 9:46











  • Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

    – thomasmichaelwallace
    Nov 22 '18 at 11:57








1




1





Could you confirm how you're pass data from one lambda to another?

– thomasmichaelwallace
Nov 22 '18 at 9:25





Could you confirm how you're pass data from one lambda to another?

– thomasmichaelwallace
Nov 22 '18 at 9:25













@thomasmichaelwallace Using 'event'.

– TeeKay
Nov 22 '18 at 9:34





@thomasmichaelwallace Using 'event'.

– TeeKay
Nov 22 '18 at 9:34













As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

– thomasmichaelwallace
Nov 22 '18 at 9:39





As in, you have two different lambda functions, and the first lambda function is invoking the second asynchronously using the boto3 invoke? Or they're connected by step functions? Or an outside script/application is invoking the first one, getting the response, and then passing that response to a second one?

– thomasmichaelwallace
Nov 22 '18 at 9:39













@thomasmichaelwallace They are connected by step functions

– TeeKay
Nov 22 '18 at 9:46





@thomasmichaelwallace They are connected by step functions

– TeeKay
Nov 22 '18 at 9:46













Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

– thomasmichaelwallace
Nov 22 '18 at 11:57





Can you post your step function definition (at least the two steps that link them) also, please? And ideally the full handler of the first lambda function.

– thomasmichaelwallace
Nov 22 '18 at 11:57












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