postText doesn't return sessionAttributes for dialogAction type 'Delegate'

[plotic]

Confirm by changing [ ] to [x] below to ensure that it's a bug:

• [x] I've gone through Developer Guide and API reference
• [x] I've checked AWS Forums and StackOverflow for answers
• [x] I've searched for previous similar issues and didn't find any solution

Describe the bug I'm trying to build a chatbot infrastructure by using AWS API Gateway and AWS Lex. I have attached for API and Lex bot a separate lambda function. When invoking the Lex with lexruntime.postText i trigger the Lex lambda function. In this lambda function i want to set some sessionAttributes and return the response with DialogAction's type "Delegate". The bug is that sessionAttributes are not being returned. But if DialogAction's type is "Close" the sessionAttributes is getting returned.

Is the issue in the browser/Node.js? Node.js

If on Node.js, are you running this on AWS Lambda? YES, AWS almbda

Details of the browser/Node.js version v12.12.0

SDK version number 2.631.0

• For Node.js, get SDK version by
  • running command npm list aws-sdk from your root directory
  • printing the output of console.log(AWS.VERSION) in your code where AWS = require("aws-sdk");
  • if running on Lambda and using SDK provided by Lambda runtime, you can find the SDK versions here

To Reproduce (observed behavior) Lambda 1 (AWS API Gateway)

  var params = {
        botAlias: '$LATEST',
        botName: 'SampleBot',
        inputText: "hey", 
        sessionAttributes: {},
        userId: "userId"
    };

    return await lexruntime.postText(params, function(err, data) {
        if (err) { 
            console.log(err.errorMessage)
        }
        else {     
            console.log('Lambda invoked')
        }
    }).promise();

Lambda 2

  const welcomeIntent = (intentRequest, callback) => {
    const sessionAttributes = intentRequest.sessionAttributes;        
    if (intentRequest.invocationSource === 'DialogCodeHook') {
        sessionAttributes.someAttribute = "someValue"  
         callback(delegate(sessionAttributes, intentRequest.currentIntent.slots));    
        return
    }
    callback(close(sessionAttributes, 'Fulfilled', { contentType: 'PlainText', content: 'Thanks' }));
  };

  const delegate = (sessionAttributes, slots) => ({
    sessionAttributes,
    dialogAction: {
      type: 'Delegate',
      slots      
    },
  });

lexruntime.postText returns an empty sessionAttributes

Expected behavior lexruntime.postText should return sessionAttributes with data set in Lex's Lambda

Screenshots If applicable, add screenshots to help explain your problem.

Additional context Add any other context about the problem here.

[ajredniwja]

Hey @plotic Apologies for late reply, I was not able to reproduce this locally, can you make sure you are using the guidelines mentioned here to ship the latest version of the SDK.

[github-actions[bot]]

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