Increased 502s and Errors

[tmw]

Hey,

Our app is experiencing increased random 502 errors with no particular reason, I also noticed an increased in Error: error while making HTTP request to app: operation was canceled: request has been canceled in the logs, don’t know if related.

Any help debugging would be appreciated!

tmw

[greg]

Hmm

Given that particular error message, could this be the cause? Depends on your app and what it’s doing etc but certainly sounds similar, with a timeout/cancel:

Debugging 502 responses

Aha, I think I might know the issue: the app sets a relatively tight deadline for writing the response to the client, so it might close the connection before the client has finished reading it. Let me try adjusting that timeout to see if it has any impact on these 502s. (I should have thought of this before posting here, I’m sorry for the noise if this turns out to be the problem!) The app is written in Go and “resolves” shortened URLs, primarily from social media.