Kendra Web Cwaler is executed, but the KendraCrawlerSNSTopic that launches the ClowlerLambda is not triggered

[k-kawamura008]

Describe the bug
I have run Kendra Web Crawler and confirmed that the web crawl is successful, but the SNS (KendraCrawlerSNSTopic) that triggers the CrawlerLambda is not triggered.
https://github.com/aws-solutions/qnabot-on-aws/blob/main/source/docs/Technical%20Information.md#sns
The above says that the SNS (KendraCrawlerSNSTopic) that triggers the CrawlerLambda is triggered when the Kendra Web Crawler is executed, but is this documentation wrong?

To Reproduce

1. Set and update KendraID in QnABot stack.
2. Go to Designers UI > Settings
3. Change ENABLE_KENDRA_WEB_INDEXER: true, KENDRA_INDEXER_URLS: https://aws.amazon.com/lex/faqs/ , KENDRA_INDEXER_SCHEDULER: rate (1 day) (from now on, implement Guide > Advanced setup > Integrating Amazon Kendra > Web page indexer)
4. Designers UI > Amazon Kendra Web Crawler > START INDEXING
5. Check Status:COMPLETE WITH ERRORS
6. Check ClientUI > What is Lex?
7. Check KendraCrawlerSNSTopic from AWS console, but no subscriptions are set and there is no evidence of Topic activity
8. Add an Email to the subscription of KendraCrawlerSNSTopic and perform steps 4-6 again, but no Email is received

Expected behavior
When the Kendra Web Crawler is executed, an API is called in ContentDesigner and the SNS (KendraCrawlerSNSTopic) that triggers the ClowlerLambda is triggered

Please complete the following information about the solution:

• Version: v5.5.2
• Region: ap-northeast-1
• Was the solution modified from the version published on this repository?
• If the answer to the previous question was yes, are the changes available on GitHub?
• Have you checked your service quotas for the services this solution uses?
• Were there any errors in the CloudWatch Logs?

Screenshots
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Additional context
Add any other context about the problem here.

[abhirpat]

Hi @k-kawamura008 , thank you for reporting this. We'll look into this and get back to you.

[fhoueto-amz]

Hi
Thanks for pointing this out. The KendraCrawlerSnsTopic is not currently used. We will plan on updating the code and the documentation.