SUMMARY: (nothing useful) Re: CLOSE_WAIT problem, maybe?

From: Adam and Christine Levin (
Date: Tue Sep 26 2000 - 13:55:48 CDT

Original problem below. Thanks to those who responded, but nothing so
far. One point is that I spoke to an engineer for our ecommerce package
(BroadVision), and he said these CLOSE_WAITs are normal, that the NSAPI
module for Netscape keeps the connections on the brink of closing in case
it needs them again, but that this shouldn't affect anything abnormally.

Oh, well.

On Thu, 21 Sep 2000, Adam and Christine Levin wrote:
> I've got a weird problem.
> We're running a couple of Enterprise E250's load-balanced behind a
> checkpoint firewall. They're running Netscape's Enterprise Server 3.61.
> Every night, the web logs rotate and the web server restarts.
> After the restart, I start seeing more and more open connections on the
> machine. They build up over the course of the day, every day,
> consistently, until there are over 500 of them. netstat reports a ton of
> connections in CLOSE_WAIT, and they're all from the web server machine to
> our e-commerce machine.
> The first question is, whence have these CLOSE_WAITs come, and how can I
> send them home?
> The second question is, would this cause my connection queues to fill up
> and not accept any new connections?
> I've got the following set on the machine:
> /usr/sbin/ndd -set /dev/tcp tcp_conn_req_max_q0 1024
> /usr/sbin/ndd -set /dev/tcp tcp_conn_req_max_q 512
> /usr/sbin/ndd -set /dev/tcp tcp_rexmit_interval_max 60000
> /usr/sbin/ndd -set /dev/tcp tcp_close_wait_interval 60000
> /usr/sbin/ndd -set /dev/tcp tcp_keepalive_interval 300000
> /usr/sbin/ndd -set /dev/tcp tcp_mss_def 1460
> /usr/sbin/ndd -set /dev/tcp tcp_mss_max 1460
> /usr/sbin/ndd -set /dev/tcp tcp_ip_abort_cinterval 180000
> /usr/sbin/ndd -set /dev/tcp tcp_ip_abort_interval 60000
> /usr/sbin/ndd -set /dev/tcp ip_path_mtu_discovery 1
> /usr/sbin/ndd -set /dev/tcp tcp_mss_max 1460
> /usr/sbin/ndd -set /dev/tcp tcp_rexmit_interval_min 1000
> /usr/sbin/ndd -set /dev/tcp tcp_deferred_ack_interval 500
> /usr/sbin/ndd -set /dev/tcp tcp_xmit_hiwat 32768
> /usr/sbin/ndd -set /dev/tcp tcp_recv_hiwat 32768
> /usr/sbin/ndd -set /dev/tcp tcp_slow_start_initial 2
> Thanks,
> -Adam

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This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:14:18 CDT