Date: Sat, 27 Aug 2022 15:18:03 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: Ronald Klop <ronald-lists@klop.ws>, Ganbold Tsagaankhuu <ganbold@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: double used hostuuids - Re: NFS issue - newnfs_request: Wrong session srvslot=1 slot=0, freeing free slot!! Message-ID: <YT2PR01MB9729EE869613DDED306D9CB0DD749@YT2PR01MB9729.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <54e4240c-2ced-d079-5bfe-f3d397ff7f8f@klop.ws> References: <CAGtf9xNNCQLsWSN%2BspZmE8cQJ6UDTcdNcURbZxGdEo4-qZxn1A@mail.gmail.com> <YT4PR01MB9736383BF3B6F85D90115BA2DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM> <CAGtf9xM6NHZuBEiEnYC%2BFDNqy6gPkUDkt=Ei7O_ymQV5SZEfgA@mail.gmail.com> <YT4PR01MB97362592C844062ABCA85625DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM> <YT4PR01MB97360B04D031BBD408029C59DD759@YT4PR01MB9736.CANPRD01.PROD.OUTLOOK.COM> <54e4240c-2ced-d079-5bfe-f3d397ff7f8f@klop.ws>
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Ronald Klop <ronald-lists@klop.ws> wrote:=0A= >On 8/27/22 00:17, Rick Macklem wrote:=0A= >> Ganbold Tsagaankhuu <ganbold@gmail.com> wrote:=0A= >>>> Rick,=0A= >>>>=0A= >>>> On Fri, Aug 26, 2022 at 11:18 AM Rick Macklem > ><rmacklem@uoguelph.ca= <mailto:rmacklem@uoguelph.ca>> wrote:=0A= >> Ganbold Tsagaankhuu <ganbold@gmail.com<mailto:ganbold@gmail.com>> wrote:= =0A= >>>>> Hi,=0A= >>>>>=0A= >>>>> We are having trouble with NFS running on STABLE:=0A= >>>>>=0A= >>>>> Aug 26 02:21:42 iron2 kernel: newnfs_request: Wrong session srvslot= =3D1 slot=3D0=0A= >> [stuff snipped]=0A= >>>>> Aug 26 02:22:46 iron2 kernel: newnfs_request: Wrong session srvslot= =3D1 slot=3D0=0A= >>>>> Aug 26 02:22:46 iron2 kernel: freeing free slot!!=0A= >>>>>=0A= >>>>> We are running FreeBSD 13.1-STABLE #3 stable/13-n252198-c1434fd2dea: = Fri Aug 26 01:51:53 UTC 2022 and mount options are:=0A= >>>>>=0A= >>>>> rw,nfsv4,minorversion=3D1,bg,soft,timeo=3D20,retrans=3D5,retrycnt=3D5= =0A= >>>>> ro,nfsv4,minorversion=3D1,bg,soft,timeo=3D20,retrans=3D5,retrycnt=3D5= =0A= >>>>>=0A= >>>>> Is there any fix for this issue?=0A= >> Oh, and one more thing. If you have multiple clients mounting the=0A= >> NFSv4 server, make sure they all have unique hostids.=0A= >> Check /etc/hostid and "sysctl kern.hostuuid". If two clients have the=0A= >> same kern.hostuuid, there will be lots of trouble.=0A= >>=0A= >> rick=0A= >=0A= >=0A= >Just a thought. Is it possible/easy to warn about double used hostuuids >f= rom different client IP addresses?=0A= >Although that will not help this person using Netapp as a server.=0A= I don't think so. Same hostuuid implies same system, so how does a=0A= server know they are two different systems?=0A= - A client could have multiple IP host addresses, so different client=0A= host IP addresses for a TCP connection does not imply different systems.= =0A= =0A= I can, however, modify the console message the server generates when=0A= it sees a session has been replaced to include "check clients have=0A= unique hostuuids", which might help.=0A= =0A= I also plan on adding a sentence to "man mount_nfs" about this,=0A= since I just had an email discussion with someone else where the=0A= problem turned out to be "same hostuuids for multiple clients"=0A= and the loss of sessions on the FreeBSD server was the hint that=0A= clued me in.=0A= =0A= At least I now know this configuration issue exists.=0A= =0A= rick=0A= =0A= Regards,=0A= Ronald.=0A=
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