[jcigar at ulb.ac.be: Listen queue overflow: 8 already in queue awaiting acceptance]

[hiren panchasara]

On Fri, Oct 3, 2014 at 1:01 AM, Julien Cigar <jcigar at ulb.ac.be> wrote:
> On Thu, Oct 02, 2014 at 04:36:49PM -0700, hiren panchasara wrote:
>> On Thu, Oct 2, 2014 at 11:19 AM, Julien Cigar <jcigar at ulb.ac.be> wrote:
>> > On Thu, Oct 02, 2014 at 10:24:13AM -0700, hiren panchasara wrote:
>> >> On Thu, Oct 2, 2014 at 9:42 AM, Julien Cigar <jcigar at ulb.ac.be> wrote:
>> >> > sorry for cross-posting, I'm forwarding this as it seems that part of
>> >> > the problem is also related to:
>> >> > https://lists.freebsd.org/pipermail/freebsd-net/2014-September/039664.html
>> >>
>> >> Umm, this looks like a different problem than the subject of this email.
>> >
>> > yes and no, seems the same hardware (HP and igb) and I have also some
>> > "requests for mbufs denied" (https://dpaste.de/t8kJ/raw) without any
>> > reasons. I should add that the box hanged a week ago and I had to do a
>> > hard reboot, I have the feeling that it's somewhat related to this
>> > problem ..
>> >
>> I suggest you try to debug these 2 problems separately.  Did you get a
>> chance to look at kgdb to find the culprit process as I suggested
>> below?
>
> I tried what you suggested, but I get a "No struct type named inpcb"
> Any idea ? :)

Is your kernel not build with debug symbols? Can you share your kernconf?

I have following in my kernconf:

makeoptions     DEBUG=-g
options         KDB
options         KDB_TRACE
options         DDB

cheers,
Hiren

>>
>> cheers,
>> Hiren
>> >> >
>> >> > I also wonder if something has been fixed in -STABLE in this area ..
>> >> >
>> >> > (please keep me in CC as I'm not subscribed on freebsd-net@ an
>> >> > freebsd-stable@)
>> >> >
>> >> > --
>> >> > Julien Cigar
>> >> > Belgian Biodiversity Platform (http://www.biodiversity.be)
>> >> > PGP fingerprint: EEF9 F697 4B68 D275 7B11  6A25 B2BB 3710 A204 23C0
>> >> > No trees were killed in the creation of this message.
>> >> > However, many electrons were terribly inconvenienced.
>> >> >
>> >> >
>> >> > ---------- Forwarded message ----------
>> >> > From: Julien Cigar <jcigar at ulb.ac.be>
>> >> > To: freebsd-questions at freebsd.org
>> >> > Cc:
>> >> > Date: Thu, 2 Oct 2014 11:52:06 +0200
>> >> > Subject: Listen queue overflow: 8 already in queue awaiting acceptance
>> >> > Hello,
>> >> >
>> >> > I'm running 10-RELEASE on a HP Proliant DL160 Gen8 and I'm seeing the
>> >> > following in my kernel logs:
>> >> > sonewconn: pcb 0xfffff8010e561310: Listen queue overflow: 8 already in
>> >> > queue awaiting acceptance
>> >>
>> >> This usually means the application is not keeping up with the incoming
>> >> connections.
>> >> >
>> >> > I already raised kern.ipc.soacceptqueue to 1024 and  netstat -naA | grep
>> >> > "fffff8010e561310" returns nothing
>> >>
>> >> This is the usual way of finding the culprit process. If this doesn't
>> >> return anything, it probably means that it is a short-lived process.
>> >>
>> >> Here is an example of what you could do:
>> >>
>> >> sonewconn: pcb 0xfffff8008f40cb10: Listen queue overflow: 1 already in queue
>> >> awaiting acceptance
>> >>
>> >> From kgdb,
>> >> (kgdb) p ((struct inpcb *)0xfffff8008f40cb10)->inp_inc
>> >> $3 = {inc_flags = 0 '\0', inc_len = 0 '\0', inc_fibnum = 0, inc_ie = {ie_fport
>> >> = 0, ie_lport = 10295, ie_dependfaddr = {
>> >>       ie46_foreign = {ia46_pad32 = {0, 0, 0}, ia46_addr4 = {s_addr = 0}},
>> >> ie6_foreign = {__u6_addr = {
>> >>           __u6_addr8 = '\0' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0,
>> >> 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}},
>> >>     ie_dependladdr = {ie46_local = {ia46_pad32 = {0, 0, 0}, ia46_addr4 =
>> >> {s_addr = 0}}, ie6_local = {__u6_addr = {
>> >>           __u6_addr8 = '\0' <repeats 15 times>, __u6_addr16 = {0, 0, 0, 0, 0,
>> >> 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}}}}
>> >>
>> >> Here, ie_lport = 10295 which is in n/w byte order and converting it to host
>> >> byte order, 10295 -> 0x2837 and swapping them gives us 0x3728 which is 14120.
>> >>
>> >> Now, use sockstat to find out what process is on that port:
>> >>
>> >> $ sockstat -l | grep 14120
>> >>
>> >> cheers,
>> >> Hiren
>> >
>> > --
>> > Julien Cigar
>> > Belgian Biodiversity Platform (http://www.biodiversity.be)
>> > PGP fingerprint: EEF9 F697 4B68 D275 7B11  6A25 B2BB 3710 A204 23C0
>> > No trees were killed in the creation of this message.
>> > However, many electrons were terribly inconvenienced.
>
> --
> Julien Cigar
> Belgian Biodiversity Platform (http://www.biodiversity.be)
> PGP fingerprint: EEF9 F697 4B68 D275 7B11  6A25 B2BB 3710 A204 23C0
> No trees were killed in the creation of this message.
> However, many electrons were terribly inconvenienced.