Data in lambda event is not persistent











up vote
0
down vote

favorite












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 at 9:25










  • @thomasmichaelwallace Using 'event'.
    – TeeKay
    Nov 22 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 at 9:39










  • @thomasmichaelwallace They are connected by step functions
    – TeeKay
    Nov 22 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 at 11:57















up vote
0
down vote

favorite












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 at 9:25










  • @thomasmichaelwallace Using 'event'.
    – TeeKay
    Nov 22 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 at 9:39










  • @thomasmichaelwallace They are connected by step functions
    – TeeKay
    Nov 22 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 at 11:57













up vote
0
down vote

favorite









up vote
0
down vote

favorite











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 at 11:56









thomasmichaelwallace

2,5001817




2,5001817










asked Nov 22 at 8:39









TeeKay

221326




221326








  • 1




    Could you confirm how you're pass data from one lambda to another?
    – thomasmichaelwallace
    Nov 22 at 9:25










  • @thomasmichaelwallace Using 'event'.
    – TeeKay
    Nov 22 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 at 9:39










  • @thomasmichaelwallace They are connected by step functions
    – TeeKay
    Nov 22 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 at 11:57














  • 1




    Could you confirm how you're pass data from one lambda to another?
    – thomasmichaelwallace
    Nov 22 at 9:25










  • @thomasmichaelwallace Using 'event'.
    – TeeKay
    Nov 22 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 at 9:39










  • @thomasmichaelwallace They are connected by step functions
    – TeeKay
    Nov 22 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 at 11:57








1




1




Could you confirm how you're pass data from one lambda to another?
– thomasmichaelwallace
Nov 22 at 9:25




Could you confirm how you're pass data from one lambda to another?
– thomasmichaelwallace
Nov 22 at 9:25












@thomasmichaelwallace Using 'event'.
– TeeKay
Nov 22 at 9:34




@thomasmichaelwallace Using 'event'.
– TeeKay
Nov 22 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 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 at 9:39












@thomasmichaelwallace They are connected by step functions
– TeeKay
Nov 22 at 9:46




@thomasmichaelwallace They are connected by step functions
– TeeKay
Nov 22 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 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 at 11:57

















active

oldest

votes











Your Answer






StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53426859%2fdata-in-lambda-event-is-not-persistent%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Stack Overflow!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53426859%2fdata-in-lambda-event-is-not-persistent%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

Sphinx de Gizeh

Dijon

Guerrita