Connection reset by peer

Question

Hi

I have Asp.net 6 (MVC) application running on Docker.

Sometimes I get error recv() failed (104: Connection reset by peer) while reading response header from upstream.

I have no idea, how I can fix it, if anyone know, please help

Answer 1

Hi S.net,

What you’re experiencing relates to the "connection reset by peer" error, which is a network-level issue indicating that the remote host closed the connection unexpectedly. This typically occurs when there is a disruption in the communication between your ASP.NET 6 (MVC) application running in Docker and the upstream server, possibly due to timeouts, resource limits, or network interruptions.

Here’s how you can troubleshoot and resolve it:

• Check your application and upstream server logs for any signs of errors, timeouts, or resource exhaustion around the time the issue occurs.
• Review your Docker container resource allocations (CPU, memory, network) to ensure they are sufficient for your application's workload.
• Inspect your network configuration, including firewalls and proxies, to rule out any interruptions or dropped connections.
• If you are using a reverse proxy (like NGINX or Apache), verify its timeout and buffer settings to ensure they are appropriate for your application's response times.
• Consider enabling more detailed logging or network tracing to help pinpoint where the connection is being closed.

You can also find a detailed walkthrough in our documentation here:

Connection reset by peer - Microsoft Q&A

I hope this helps you get things back on track quickly! If you agree with my suggestion, feel free to interact with the system accordingly!