What does "connection reset by peer" mean?

sockets tcp
Franck Freiburger picture Franck Freiburger · Sep 16, 2009 · Viewed 877.8k times · Source

What is the meaning of the "connection reset by peer" error on a TCP connection? Is it a fatal error or just a notification or related to the network failure?

Answer

ire_and_curses picture ire_and_curses · Sep 16, 2009

It's fatal. The remote server has sent you a RST packet, which indicates an immediate dropping of the connection, rather than the usual handshake. This bypasses the normal half-closed state transition. I like this description:

"Connection reset by peer" is the TCP/IP equivalent of slamming the phone back on the hook. It's more polite than merely not replying, leaving one hanging. But it's not the FIN-ACK expected of the truly polite TCP/IP converseur.

Related questions

How do I debug error ECONNRESET in Node.js?

I'm running an Express.js application using Socket.io for a chat webapp and I get the following error randomly around 5 times during 24h. The node process is wrapped in forever and it restarts itself immediately. The problem is that …

Read More
Can two applications listen to the same port?

Can two applications on the same machine bind to the same port and IP address? Taking it a step further, can one app listen to requests coming from a certain IP and the other to another remote IP? I know …

Read More
Python: Binding Socket: "Address already in use"

I have a question regarding client socket on TCP/IP network. Let's say I use try: comSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) comSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) except socket.error, msg: sys.stderr.write("[…

Read More