close() is not closing socket properly

Question

I have a multi-threaded server (thread pool) that is handling a large number of requests (up to 500/sec for one node), using 20 threads. There\'s a listener thread that acc

Answer 1

This sounds to me like a bug in your Linux distribution.

The GNU C library documentation says:

When you have finished using a socket, you can simply close its file descriptor with close

Nothing about clearing any error flags or waiting for the data to be flushed or any such thing.

Your code is fine; your O/S has a bug.