Investigating Intermittent ECONNRESET Errors in Local TCP Connections (Part 1)
By
zdw
If you only eat one bagel today, this is the bagel.
Summary
A technical blog post investigating mysterious ECONNRESET errors occurring between two services communicating over TCP on the same machine. The author sets up a reproducer with a server that opens a listening TCP socket bound to localhost, and a client that connects to it. Despite no crashes or other errors in logs, the connecting service intermittently receives ECONNRESET errors while reading from the socket. The post is part 1 of 2, setting up the problem and a lab reproducer.
Key quotes
· 3 pulledTwo services running on the same machine. One of them opens a listening TCP socket bound to localhost, the other one connects to that.
Every now and then, the service that initiated the connection gets an ECONNRESET while reading from the socket -- but no other errors show up in the logs, no crashes, nothing.
Let's start with the "server", i.e. the service that opens the listening socket.
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