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#1 2019-11-17 14:31:36

graysky
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From: :wq
Registered: 2008-12-01
Posts: 9,867
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Possible to clear sm-notify cache? Where is it even stored?

Where on the filesystem does sm-notify cache the list of clients it queries and how can one clear that list?  I ask due to a delay in starting nfs-server.service which coincides with a number of entries in journalctl detailing hostnames of VMs that no longer exist.  My thought is that if I clear the cache file, I can avoid the delay and multiple entries in journalctl.

I found links to others with this observation and question but no answer.  I tried grepping for these hostnames in /var/lib/nfs but got nothing.

...
Nov 17 09:06:14 ease sm-notify[48033]: DNS resolution of vm-audio failed; retrying later
Nov 17 09:06:15 ease sm-notify[48033]: DNS resolution of vm-stockcar failed; retrying later
Nov 17 09:06:16 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:06:16 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:06:40 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:06:48 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:06:48 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:11 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:18 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:18 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:25 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:38 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:49 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:07:49 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:09 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:15 ease sm-notify[48033]: DNS resolution of vm-audio failed; retrying later
Nov 17 09:08:15 ease sm-notify[48033]: DNS resolution of vm-stockcar failed; retrying later
Nov 17 09:08:19 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:19 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:40 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:51 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:08:51 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied
Nov 17 09:09:11 ease systemd-networkd[422]: veth9TTRO4: Failed to save link data to /run/systemd/netif/links/7: Permission denied

CPU-optimized Linux-ck packages @ Repo-ck  • AUR packagesZsh and other configs

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#2 2019-11-18 12:56:03

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 7,447

Re: Possible to clear sm-notify cache? Where is it even stored?

https://linux.die.net/man/8/sm-notify wrote:

Files

/var/lib/nfs/statd/sm

directory containing monitor list
/var/lib/nfs/statd/sm.bak

directory containing notify list

/var/lib/nfs/statd/state

NSM state number for this host
/proc/sys/fs/nfs/nsm_local_state

kernel's copy of the NSM state number


Multi-init booting with apg Openrc and systemd coexisting
Automounting : not needed, i prefer pmount
Aur helpers : makepkg + my own local repo === rarely need them

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#3 2019-11-18 20:27:25

graysky
Wiki Maintainer
From: :wq
Registered: 2008-12-01
Posts: 9,867
Website

Re: Possible to clear sm-notify cache? Where is it even stored?

@lone_wolf - I read that but I do not have a statd directory under /var/lib/nfs at all.  If I grep each file under /var/lib/nfs for one of those hostnames, I do not find a match.  Interestingly, if I delete that entire dirtree, and reinstall nfs-utils, the problem went away.  I think that is direct evidence that the offending list is under that dirtree (sqlite perhaps) but the method I used to clear the cache is very blunt-force.


CPU-optimized Linux-ck packages @ Repo-ck  • AUR packagesZsh and other configs

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