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Hi FME community,

 

I am trying to start a job on FME Flow from another application by making use of a webhook and a token. The trigger results in succesfully starting a job on FME Flow, but the response is most of the time the following:

502 - Web server received an invalid response while acting as a gateway or proxy server.

It looks like this only happens when the job takes longer than 2 minutes. Does anyone have an idea where the 502 response comes from? This indicates an error while in fact the job is started as expected.

 

Version 2022.2

Build 22765 - win64

My first thought is that you're reaching a connection timeout somewhere along the line.

Are you connecting to Flow through a reverse proxy or similar?

Thanks for your response @hkingsbury​. You are correct, we are using a reverse proxy (IIS) and it indeed looks like a timeout there, because the call waits for the job to succeed or fail. I will try to split the call into submitting the job and retrieving the result.

Thanks for your response @hkingsbury​. You are correct, we are using a reverse proxy (IIS) and it indeed looks like a timeout there, because the call waits for the job to succeed or fail. I will try to split the call into submitting the job and retrieving the result.

as you're using IIS i'm therefore assuming you're using ARR - it could be as simple as increasing the timeout in ARR.

 

But yes, for longer running jobs, it generally is a good Idea to follow a more async style process and submit a request (and retrieve the job id) then poll the job ID until you no longer get a processing state

as you're using IIS i'm therefore assuming you're using ARR - it could be as simple as increasing the timeout in ARR.

 

But yes, for longer running jobs, it generally is a good Idea to follow a more async style process and submit a request (and retrieve the job id) then poll the job ID until you no longer get a processing state

Agree. Thanks for your help :)

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