ConnectionResetError

In Python, ConnectionResetError is a built-in exception that Python raises when a connection is reset by the peer. It’s a subclass of ConnectionError, which in turn derives from OSError, and it corresponds to the ECONNRESET operating system error. This typically happens when you’re reading from or writing to a socket that the remote end dropped abruptly instead of closing gracefully.

As a developer, you might encounter this exception when working with network applications. It indicates that the remote host closed the connection unexpectedly.

ConnectionResetError Occurs When

  • Reading from or writing to a socket after the peer abruptly resets the connection instead of closing it gracefully
  • Communicating with a remote process that crashed, was killed, or timed out while the connection was still open

ConnectionResetError Can Be Used When

  • Handling unexpected disconnections in client-server applications
  • Implementing retry logic for network requests in web applications
  • Logging network errors for further analysis and debugging
Python Socket Programming

Tutorial

Socket Programming in Python (Guide)

In this in-depth tutorial, you'll learn how to build a socket server and client with Python. By the end of this tutorial, you'll understand how to use the main functions and methods in Python's socket module to write your own networked client-server applications.

advanced python stdlib web-dev

For additional information on related topics, take a look at the following resources:

By Leodanis Pozo Ramos • Updated Aug. 14, 2026
Python’s Built-in Exceptions Share Feedback