When dynatrace synthetic debugger is on CloudFront returns HTTP 502 bad gateway

[Yosi_Neuman]

Hi guys,

Customer tries to record a click path and the page return http 502 error from CloudFront as long the debugger is on 

After canceling the debugger the page is loaded with no issue.

When executing / playback the recorded steps we get all the time http 502.

SO our questions are:

1. Is there a way to switch off the debugger while executing the steps?! 
2. What is the debugger use for in recording and playback / execution of a test?
3. Do we know what we need to ask the CloudFront guys to set in order to over come this error?

Thanks in advance for your help with that 

Yos 

[Peter_Youssef]

Hello @Yosi_Neuman 

Kindly find the attached resources for checking and applying required fixes:

1. https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/http-502-bad-gateway.html 
2. https://repost.aws/knowledge-center/cloudfront-502-errors 
3. https://repost.aws/questions/QUcZSshR25R3yI6QdG4uO2Ig/ongoing-502-bad-gateway-error 
4. https://stackoverflow.com/questions/20664018/cloudfront-custom-origin-distribution-returns-502-error... 
5. https://wetopi.com/502-bad-gateway/ 

Hopefully it adds value.

KR,

Peter.

[AntonioSousa]

@Yosi_Neuman,

I have had similar issues before, but they were related to the parameters added to the User-Agent HTTP Header by Dynatrace Synthetics. At the time, I confirmed this with curl requests, adding the modified User-Agent... If it's the case, you'll also get the 502's back.

[Yosi_Neuman]

Hi @Peter_Youssef  & @AntonioSousa 

Thanks for your inputs on this subject, my case was solved by a "magic" from security guys 

Have no idea what was changed and also think security guys don't have a clue too 

May be its was related to the synthetic user agent but not sure.

Thanks

Yos 

[Peter_Youssef]

Thanks @Yosi_Neuman for the update.

We would appreciate providing us the key behind the resolution for future scenarios.

KR,

Peter.