Public bug reported:
Binary package hint: nfs-kernel-server
On Ubuntu 8.04.2 running nfs-kernel-server exporting NFSv4 share,
sometime the server completely freeze with cap lock and scroll lock on
(not blinking). The only thing I could do is to hit the reset button
(the Alt-SysReq-REISUB magic key won't work). This has happens many
times, and every time the NFSv4 client is doing something on the
exported share (sometime it is as simple as just ls).
FYI, NFSv4 service was just added recently, and before that the machine
never freeze.
Addition information follows.
$ lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04
$ uname -a
Linux serv 2.6.24-23-server #1 SMP Mon Jan 26 00:55:21 UTC 2009 i686 GNU/Linux
$ apt-cache policy nfs-kernel-server
nfs-kernel-server:
Installed: 1:1.1.2-2ubuntu2.2
Candidate: 1:1.1.2-2ubuntu2.2
Version table:
*** 1:1.1.2-2ubuntu2.2 0
500 http://th.archive.ubuntu.com hardy-updates/main Packages
500 http://security.ubuntu.com hardy-security/main Packages
100 /var/lib/dpkg/status
1:1.1.2-2ubuntu2 0
500 http://th.archive.ubuntu.com hardy/main Packages
$ apt-cache policy nfs-common
nfs-common:
Installed: 1:1.1.2-2ubuntu2.2
Candidate: 1:1.1.2-2ubuntu2.2
Version table:
*** 1:1.1.2-2ubuntu2.2 0
500 http://th.archive.ubuntu.com hardy-updates/main Packages
500 http://security.ubuntu.com hardy-security/main Packages
100 /var/lib/dpkg/status
1:1.1.2-2ubuntu2 0
500 http://th.archive.ubuntu.com hardy/main Packages
$ cat /etc/exports
/srv/nfs-export
192.xx.xx.xx(rw,fsid=0,insecure,no_subtree_check,sync)
/srv/nfs-export/backup
192.xx.xx.xx(rw,nohide,insecure,no_subtree_check,sync,no_root_squash)
The messages file around the time it freeze:
Mar 3 17:02:07 serv -- MARK --
Mar 3 17:02:09 serv kernel: [110272.579529] device eth0 left promiscuous mode
Mar 3 17:02:09 serv kernel: [110272.579548] audit(1236074529.124:4): dev=eth0
prom=0 old_prom=256 auid=4294967295
Mar 3 17:02:09 serv kernel: [110272.579558] bridge-eth0: disabled promiscuous
mode
Mar 3 17:02:30 serv kernel: [110294.324578] nfsd: last server has exited
Mar 3 17:02:30 serv kernel: [110294.324586] nfsd: unexporting all filesystems
Mar 3 17:02:31 serv exiting on signal 15
Mar 3 17:14:17 serv syslogd 1.5.0#1ubuntu1: restart.
...
Mar 3 21:14:17 serv -- MARK --
Mar 3 21:24:07 serv kernel: [15080.331319] nfsd: nfsv4 idmapping failing: has
idmapd not been started?
Mar 3 21:25:02 serv kernel: [15134.862605] nfsd: nfsv4 idmapping failing: has
idmapd not been started?
Mar 3 21:32:34 serv kernel: [15586.186764] nfs4_cb: server 192.xx.xx.xx not
responding, timed out
Mar 3 21:54:17 serv -- MARK --
Mar 3 22:14:17 serv -- MARK --
Mar 3 22:23:22 serv kernel: [18628.657135] nfs4_cb: server 192.xx.xx.xx not
responding, timed out
Mar 3 22:26:00 serv kernel: [18785.168375] nfsd: last server has exited
Mar 3 22:26:00 serv kernel: [18785.168382] nfsd: unexporting all filesystems
Mar 3 22:26:01 serv kernel: [18787.278728] NFSD: Using /var/lib/nfs/v4recovery
as the NFSv4 state recovery directory
Mar 3 22:26:01 serv kernel: [18787.278758] NFSD: starting 90-second grace
period
Mar 3 22:26:15 serv kernel: [18802.035835] nfs4_cb: server 192.xx.xx.xx not
responding, timed out
Mar 3 23:21:58 serv syslogd 1.5.0#1ubuntu1: restart.
...
Mar 4 21:21:58 serv -- MARK --
Mar 4 21:34:28 serv kernel: [79874.672861] nfsd: last server has exited
Mar 4 21:34:28 serv kernel: [79874.672871] nfsd: unexporting all filesystems
Mar 4 21:34:29 serv kernel: [79876.491030] NFSD: Using /var/lib/nfs/v4recovery
as the NFSv4 state recovery directory
Mar 4 21:34:29 serv kernel: [79876.491053] NFSD: starting 90-second grace
period
Mar 4 21:43:31 serv kernel: [80417.492162] nfs4_cb: server 192.xx.xx.xx not
responding, timed out
Mar 4 22:01:58 serv -- MARK --
Mar 4 22:21:58 serv -- MARK --
Mar 4 22:41:58 serv -- MARK --
Mar 4 23:01:58 serv -- MARK --
Mar 4 23:21:58 serv -- MARK --
Mar 4 23:41:59 serv -- MARK --
Mar 5 00:01:59 serv -- MARK --
Mar 5 00:21:59 serv -- MARK --
Mar 5 00:41:59 serv -- MARK --
Mar 5 09:34:17 serv syslogd 1.5.0#1ubuntu1: restart.
All restarts are caused by the reset button, 192.xx.xx.xx is the IP of
the only client.
Client Information:
$ lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04
$ uname -a
Linux client 2.6.24-23-server #1 SMP Mon Jan 26 01:36:05 UTC 2009 x86_64
GNU/Linux
$ cat /etc/fstab | tail -1
serv:/backup /srv/nfs-import/backup nfs4 _netdev,auto 0 0
** Affects: nfs-utils (Ubuntu)
Importance: Undecided
Status: New
--
Machine freeze on NFSv4 operations (server side)
https://bugs.launchpad.net/bugs/338084
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