What a connection reset error actually is

A connection reset error means the other computer abruptly closed the conversation with your computer before it was finished. Think of it like calling someone on the phone and having them hang up mid-sentence without warning. The error message you see — usually something like "java.net.SocketException: Connection reset" — is Java telling you that the server you were trying to reach stopped responding and cut off the link.

This is different from a timeout, where your computer waits and waits for an answer that never comes. A reset is active: the server is saying "I'm done talking to you" rather than going silent. The problem can live on your side, the server's side, or somewhere in between.

Key Takeaways

  • A connection reset means the server closed the link unexpectedly, not that your internet went down or the website is unreachable.
  • The most common causes are the server running out of memory, a firewall blocking the connection, or network problems between you and the server.
  • Restarting your process or waiting a few minutes often fixes the problem if it is temporary on the server side.
  • If the error keeps happening, check your firewall settings, your internet connection, and whether the server is actually running.
  • Developers can reduce these errors by setting longer timeouts, closing connections properly, and monitoring server memory use.

Why servers close connections without warning

A server closes a connection abruptly for several concrete reasons. The server might be running out of memory and shutting down connections to free up space. It might have crashed or restarted. A firewall between you and the server might be blocking the connection and cutting it off. The network cable or router between you and the server might have a problem. Or the server software itself might have a bug that causes it to drop connections.

Sometimes the server is working fine but has a rule that says "if a connection sits idle for more than 30 seconds, close it." If your process is waiting longer than that to send data, the server closes the connection first.

Steps to take when you see this error

Start by closing the process completely and opening it again. Many connection reset errors are one-time glitches — the server had a brief problem, and restarting your process will reconnect you cleanly.

If that does not work, wait five to ten minutes and try again. The server might be restarting or dealing with a temporary overload. Check your internet connection by opening a web browser and visiting a website you know works. If the website loads, your internet is fine. If it does not, restart your router by unplugging it for 30 seconds, plugging it back in, and waiting for it to fully restart.

If your internet is working but the error persists, check whether other people can reach the same server. Search for the server name plus "down" or "status" to see if there are reports of an outage. If the server is down, you cannot fix it — you have to wait for the people running it to bring it back up.

Firewall and security software problems

A firewall can block or reset connections if it thinks the traffic is suspicious. This is especially common if you are using a corporate network, a school network, or a VPN. The firewall might be set to close connections that last too long or send too much data at once.

If you are on a corporate or school network, contact your IT department and describe the error. They can check whether the firewall is blocking the connection. If you are using a personal firewall or antivirus software on your own computer, try temporarily disabling it to see whether the error goes away. If it does, add the process to the firewall's whitelist or exception list so it can connect freely.

Network problems between you and the server

Sometimes the problem is not your computer or the server, but the path between them. Your internet service provider, a router, or a network switch somewhere in the middle might be dropping the connection. These problems are hard to diagnose from your computer because you cannot see what is happening on the network path.

If you are on WiFi, try moving closer to the router or switching to a wired connection with an ethernet cable. WiFi can drop packets or lose signal, which sometimes causes the server to reset the connection. If you are already on a wired connection, restart your router and modem. Unplug both, wait 30 seconds, plug in the modem first, wait for it to fully start up (usually one to two minutes), then plug in the router and wait again.

What developers can do to prevent these errors

If you are writing code that connects to a server, you can reduce connection reset errors by setting a longer timeout. By default, Java waits only a few seconds before giving up. If the server is slow or the network is congested, that timeout is too short. Setting it to 30 or 60 seconds gives the server more time to respond.

Developers should also close connections properly when they are done using them, rather than letting them hang open. A connection that stays open too long might hit the server's idle timeout and get reset. Monitoring server memory and CPU use helps catch problems before they cause widespread connection resets. If the server is running low on memory, it will start closing connections to free up space.

When to contact support

If you have restarted your process, checked your internet connection, waited several minutes, and the error still happens every time you try to connect, contact the support team for the service you are trying to use. Tell them exactly when the error started, whether it happens every time or only sometimes, and what you were doing when it happened. That information helps them check their server logs and see what went wrong.

If you are the developer and your users are reporting this error, check your server logs to see whether the server is actually closing the connections or whether something else is happening. Look for error messages, memory warnings, or signs that the server ran out of resources. If the server is crashing, you need to fix the bug or add more memory. If the firewall is the problem, you might need to adjust its settings or work with your network team.

Frequently Asked Questions

Does a connection reset mean my internet is broken?

Not necessarily. A connection reset is about one specific link to one server, not your whole internet. Your internet could be working fine while that one server is having problems. Test by opening a web browser and visiting a different website. If that works, your internet is fine.

Why does the error say "Connection reset by peer"?

"Peer" just means the other computer — in this case, the server. "Connection reset by peer" means the server closed the connection. It is the same problem as "Connection reset" and the fixes are the same.

Can I fix this error by changing my DNS?

Changing DNS (the service that translates website names into addresses) rarely fixes a connection reset error. DNS is about finding the server, not about the connection itself. Only try this if you are having trouble reaching the server at all. If you can reach it sometimes but get reset errors, the problem is elsewhere.

What if the error only happens on my work network?

Your workplace firewall or proxy is likely blocking or resetting the connection. Contact your IT department and ask whether the server you are trying to reach is blocked. They may need to add it to an exception list or adjust the firewall rules.

Does restarting my computer help?

Sometimes. A restart clears out memory and closes all open connections, which can fix temporary problems. It is worth trying if restarting just the process did not work. But if the error keeps happening after a restart, the problem is not a stuck process on your computer.