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Sent two requests to Target URL but capture only one response

ahmed
New Member

Hello Everyone,

I came across a odd scenario so thought ask for advise from community.

Components deployed are below:

API Gateway: Apigee Edge

Back-end: As a back-end service client is using Azure Functions (Server-less) with Required Client Certificate turned on. Which means, Apigee must present client cert before start transmission.

Everything works fine for requests (POST/PUT/DELETE) if body of request is less then 100kb, if request body is more then 100kb 2-WAY-TLS gets stuck and 504 (Gateway Timeout) is returned to consumer application. Packet capture shows following

Server Hello - completed

Client cert Send by Apigee to backend - completed

transmission continues and then a RESET packet is sent either from APIGEE after 57 seconds. This happens because of APIGEE timeout value is 57 s.

Now to a solution, its a known bug in Azure App service or Function Apps see this article (https://docs.microsoft.com/en-us/archive/blogs/waws/posting-a-large-file-can-fail-if-you-enable-clie...)

This bug is been around for years now, work around is also mentioned in the article.

What I want to configure is

once apigee receives consumer request it sends a empty call to perform TLS and then sent consumer requests and returns response?

is that possible with APIGEE Edge?

Thanks in Advance.

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