Listening UNIX socket is not deleted when stopping Unicorn?
normalperson at yhbt.net
Thu Dec 31 14:42:45 EST 2009
Iñaki Baz Castillo <ibc at aliax.net> wrote:
> El Lunes, 28 de Diciembre de 2009, Eric Wong escribió:
> > > Hi, I listen into an UNIX socket but after stopping Unicorn the socket
> > > is not removed. Is it the expected behavior?
> > Yes.
> > Otherwise it's subject to race conditions where the socket
> > owned by a new/replacement process gets its socket unlinked.
> > Currently Unicorn unlinks any existing socket on the FS before
> > attempting to bind to it for the following reasons:
> > * I consider this less error-prone, especially when people aren't
> > storing sockets in a directory that's cleared on reboots (like /tmp).
> > * This can also be desirable behavior since it can be used to do
> > transparent upgrades/binary replacements in cases where it's less
> > convenient to use USR2+QUIT, if you're switching between Ruby
> > installations for example.
> Hi, just a question:
> Then is it totaly safe to delete the socket before starting Unicorn?
> I expect the answer is yes as Unicorn does it.
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