Connect Error before headers

upstream connect error or disconnect/reset before headers. reset reason: overflow\

Please explain this error? Is this a problem from our side ?

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Site Moderator
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October 30, 2023


This error message typically indicates a problem with the connection between a reverse proxy server and a backend server.

Here’s a concise breakdown:

  1. Upstream Connect Error: This suggests an issue when the reverse proxy server is trying to establish a connection with the backend server.

  2. Reset Reason: Overflow: The connection is being reset due to an “overflow,” which could be related to resource constraints like connection limits, buffer sizes, or other limitations.

The exact cause of this error could be resource overload, backend server problems, misconfigurations, network issues, or security measures. To troubleshoot, check server logs, monitor resource usage, and seek technical assistance if needed.

Hope that this helps!

Site Moderator
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October 30, 2023

Heya @f867415638cb4eff932132d26a8d62,

The error appears when using Proxy and usually the issue is with your Application rather than your WebService.

With that said, you’ll need to check your applicaton’s error logs to further troubleshoot the issue and find the exact error.

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