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тАО09-18-2009 03:44 AM
тАО09-18-2009 03:44 AM
automount problems after DNS-Server Change without reboot ?
We changed the DNS-Server - Entry on our SAP-Clients.
Now we have some times problems with automount.
Should we reboot ?
Is there a hidden cache to empty ?
Should we restart automount and how ?
I attach the relevant log for more info.
Thanks for all help.
Olaf
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тАО09-18-2009 04:52 AM
тАО09-18-2009 04:52 AM
Re: automount problems after DNS-Server Change without reboot ?
Did that also changed the nslookup outcome for any of the hosts? It would appear that it did and you have a hostname that now resolves to a different IP address and there is no response from that IP address. If the csappx1 is still up the restarting the NFS services might fix it.
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тАО09-19-2009 07:18 AM
тАО09-19-2009 07:18 AM
Re: automount problems after DNS-Server Change without reboot ?
The scripts to start/stop NFS services are all named "/sbin/init.d/nfs.*". There are three of them: one for services common to both the server and the client, another for server-side and the third for the client side. Automounter is one of the client-side services.
In other words:
First make sure all NFS mounts are unmounted. Then:
sh /sbin/init.d/nfs.client stop
sh /sbin/init.d/nfs.server stop
sh /sbin/init.d/nfs.common stop
sh /sbin/init.d/nfs.common start
sh /sbin/init.d/nfs.server start
sh /sbin/init.d/nfs.client start
should restart all NFS processes.
If your system has e.g. the NFS server component disabled, the server start/stop commands for it simply do nothing at all.
MK
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тАО09-20-2009 09:42 PM
тАО09-20-2009 09:42 PM
Re: automount problems after DNS-Server Change without reboot ?
Thanks for the feedbacks.
I will try to repare it with restart nfs.
After that we will see the result.
Olaf
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тАО09-27-2009 10:13 PM
тАО09-27-2009 10:13 PM
Re: automount problems after DNS-Server Change without reboot ?
Reboot the complete system with the following result:
nfs automount is stable, but the mount of /usr/sap/trans takes 25secs -> too long for us.
We decide to mount via fstab.
(exclude from automount)
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тАО09-28-2009 07:07 AM
тАО09-28-2009 07:07 AM
Re: automount problems after DNS-Server Change without reboot ?
If a manual mount of the filesystem is fast but mounting via AutoFS takes 25 seconds then something is very wrong. AutoFS should be able to mount a new filesystem in well under 1 second. If you want to troubleshoot the AutoFS problem let me know. If you're happy mounting via fstab that's fine.
Regards,
Dave
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
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тАО09-28-2009 07:19 AM
тАО09-28-2009 07:19 AM
Re: automount problems after DNS-Server Change without reboot ?
See http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1028047
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тАО09-28-2009 11:19 PM
тАО09-28-2009 11:19 PM
Re: automount problems after DNS-Server Change without reboot ?
I proposed to do more intervention.
Cause it is a highly available system for our business, we can't intervent more the problem.
First we upgrade to 11.31 (v3).
Olaf