From mboxrd@z Thu Jan  1 00:00:00 1970
MIME-Version: 1.0
Date: Wed, 11 Aug 2010 18:34:46 -0700
Message-ID: <AANLkTi=+ZPqBpGQizvcnxJ5VyH-x8vywkn05wzaj1Vhr@mail.gmail.com>
From: Akshat Kumar <akumar@mail.nanosouffle.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Content-Type: text/plain; charset=ISO-8859-1
Subject: [9fans] TCP port hung up
Topicbox-Message-UUID: 46e4b9f0-ead6-11e9-9d60-3106f5b1d025

I halted aquarela(1) with a ^D sequence, and made sure
all processes were gone. ps(1) lists no processes on
the server that could possibly be using port 445 (the
port aquarela listens on for the CIFS service). And yet,
netstat -n showed that TCP port 445 was still in LISTEN
state. Naturally, I ran

echo hangup > /net/tcp/31/ctl

to relinquish the port. Now it's in CLOSED state:

tcp  31   bootes     Closed       445        0          ::

but the port is still unusable (pre-occupied - aquarela(1)
is not able to open it). Short of rebooting the CPU server,
is there some way to regain port 445?

Quite the annoying bug...


Thanks,
ak