Date: Wed, 18 Dec 2019 14:55:16 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: Daniel Braniss <danny@cs.huji.ac.il>, "stable@freebsd.org" <stable@freebsd.org> Subject: Re: nfs lockd errors after NetApp software upgrade. Message-ID: <YQBPR0101MB1427411AFE335E869B9CF022DD530@YQBPR0101MB1427.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <EBC4AD74-EC62-4C67-AB93-1AA91F662AAC@cs.huji.ac.il> References: <EBC4AD74-EC62-4C67-AB93-1AA91F662AAC@cs.huji.ac.il>
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Daniel Braniss wrote:=0A=
=0A=
>Hi,=0A=
>The server with the problems is running FreeBSD 11.1 stable, it was workin=
g fine for >several months,=0A=
>but after a software upgrade of our NetAPP server it=92s reporting many lo=
ckd errors >and becomes catatonic,=0A=
>...=0A=
>Dec 18 13:11:02 moo-09 kernel: nfs server fr-06:/web/www: lockd not respon=
ding=0A=
>Dec 18 13:11:45 moo-09 last message repeated 7 times=0A=
>Dec 18 13:12:55 moo-09 last message repeated 8 times=0A=
>Dec 18 13:13:10 moo-09 kernel: nfs server fr-06:/web/www: lockd is alive a=
gain=0A=
>Dec 18 13:13:10 moo-09 last message repeated 8 times=0A=
>Dec 18 13:13:29 moo-09 kernel: sonewconn: pcb 0xfffff8004cc051d0: Listen q=
ueue >overflow: 194 already in queue awaiting acceptance (1 occurrences)=0A=
>Dec 18 13:14:29 moo-09 kernel: sonewconn: pcb 0xfffff8004cc051d0: Listen q=
ueue >overflow: 193 already in queue awaiting acceptance (3957 occurrences)=
=0A=
>Dec 18 13:15:29 moo-09 kernel: sonewconn: pcb 0xfffff8004cc051d0: Listen q=
ueue >overflow: 193 already in queue awaiting acceptance =85=0A=
Seems like their software upgrade didn't improve handling of NLM RPCs?=0A=
Appears to be handling RPCs slowly and/or intermittently. Note that no one=
=0A=
tests it with IPv6, so at least make sure you are still using IPv4 for the =
mounts and=0A=
try and make sure IP broadcast works between client and Netapp. I think the=
NLM=0A=
and NSM (rpc.statd) still use IP broadcast sometimes.=0A=
=0A=
Maybe the network guys can suggest more w.r.t. why, but as I've stated befo=
re,=0A=
the NLM is a fundamentally broken protocol which was never published by Sun=
,=0A=
so I suggest you avoid using it if at all possible.=0A=
=0A=
- If the locks don't need to be seen by other clients, you can just use the=
"nolockd"=0A=
mount option.=0A=
or=0A=
- If locks need to be seen by other clients, try NFSv4 mounts. Netapp filer=
s=0A=
should support NFSv4.1, which is a much better protocol that NFSv4.0.=0A=
=0A=
Good luck with it, rick=0A=
=85=0A=
any ideas?=0A=
=0A=
thanks,=0A=
danny=0A=
=0A=
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