Thanks! I'm going to read it carefully.
在 2017年2月16日星期四 UTC+8下午4:40:54，Konstantin Khomoutov写道：
>
> On Thu, 16 Feb 2017 00:29:04 -0800 (PST)
> casp...@gmail.com <javascript:> wrote:
>
> > > > Will GC close unused connection ?
> > >
> > > No. At least not directly. A finalizer can possibly do that and
> > > finalizers are possibly invoked by the GC.
> [...]
> > Means yes, GC will close unused connection, just indirectly?
> > Cause I found this:
> > #/opt/go/src/net/fd_unix.go
> > func (fd *netFD) setAddr(laddr, raddr Addr) {
> > fd.laddr = laddr
> > fd.raddr = raddr
> > runtime.SetFinalizer(fd, (*netFD).Close)
> > }
> >
> > And this function is called by netFD.dial in sock_posix.go:148
>
> It means "the runtime _may_ eventually close the connection after the
> Go's value wrapping it was garbage-collected, but this is not
> guaranteed to happend, and quite likely it will not happen".
>
> Please read this recent thread [1] dealing with finalizers.
>
> 1. https://groups.google.com/d/topic/golang-nuts/d8aF4rAob7U/discussion
>
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