How could it be possible that during one `uv_run` read_cb get fired multiple time?

[winterland1989]

I find a strange thing happening: after call uv_read_start, i call uv_run with UV_RUN_NOWAIT, i attached an unique id to each handler to track event happened during uv_run, but sometimes i can see the same handler's uv_read_callback get call multiple times, how is that possible?

I even tried add a uv_read_stop inside read callback, but it seems it's not working.

[bnoordhuis]

Is that on OS X or one of the BSDs? Those platforms can report multiple events for the same file descriptor in a single kevent() syscall. Libuv reports them as-is, it doesn't coalesce them for latency reasons.