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Add Source Function FAQ on Infinite Looping Error #7255

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merged 2 commits into from
Nov 26, 2024
Merged

Add Source Function FAQ on Infinite Looping Error #7255

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info on new error message
spencerattick Nov 22, 2024
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rewording
pwseg Nov 26, 2024
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6 changes: 6 additions & 0 deletions src/connections/functions/source-functions.md
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Expand Up @@ -438,3 +438,9 @@ The test function interface has a 4KB console logging limit. Outputs surpassing
#### Can I send a custom response from my Source Function to an external tool?

No, Source Functions can't send custom responses to the tool that triggered the Function's webhook. Source Functions can only send a success or failure response, not a custom one.

#### Why am I seeing the error "Functions are unable to send data or events back to their originating source" when trying to save my Source Function?

This error occurs because Segment prevents Source Functions from sending data back to their own webhook endpoint (`https://fn.segmentapis.com`). Allowing this could create an infinite loop where the function continuously triggers itself.

To resolve this error, check your Function code and ensure the URL `https://fn.segmentapis.com` is not included. This URL is used to send data to a Source Function and shouldn't appear in your outgoing requests. Once you remove this URL from your code, you’ll be able to save the Function successfully.
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