topic Re: automount error in Operating System - HP-UX

automount error

shameemsoft — Sun, 13 Dec 2009 07:52:51 GMT

Dear,

we have HP UNIX 11.31. we are getting following error continously.

"automountd[3363]: match_addr: getaddrinfo failed: host nor service provided, or not known"

/etc/auto.master configuration below

/net -hosts -nosuid,soft,nobrowse

It is hosts built in map.

We were using DNS before. But not used now and entry was there in /etc/resolv.conf. I commented that entry and removed not reachable IP in /etc/hosts file.

SMTP relay is not enabled.

But still we are getting this error continously. Kindly help me on this to resolve this issue.

Thanks
Shameem

Re: automount error

mvpel — Thu, 17 Dec 2009 15:03:28 GMT

Perhaps another bit of software is trying over and over again to access a /net path for a host that doesn't exist? Running a "tusc" on the automountd may prove illuminating.

Also, make sure you have PHCO_39526 installed so you're using the latest possible version of the getaddrinfo() function.

Re: automount error

shameemsoft — Sun, 20 Dec 2009 11:35:51 GMT

Dear,

Thanks for your response.

"tusc" is not installed in our servers. Is there any other way to find out the root cause?

Also PHCO_39526 is not installed in our servers. This issue occur in only few servers not all servers. But this patch is not installed in all our servers.

Kindly advise on this.

Re: automount error

R.K. # — Sun, 20 Dec 2009 15:53:03 GMT

Hi Shameem,

Have a look on following threads.

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1126831

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1360785

Re: automount error

shameemsoft — Mon, 21 Dec 2009 05:37:52 GMT

Thanks RK

Following solution is specified on this thread.

To set some pararameters in /etc/rc.config.d/nfsconf to off if I am not using them such as;
AUTOFS=0
NFS_CLIENT=0
NFS_SERVER=0
START_MOUNTD=0

But we are using NFS share and it is configured in /etc/dfs/dfstab file.

Kindly help me on this.

Re: automount error

Dave Olker — Mon, 21 Dec 2009 17:43:25 GMT

Hi Shameem,

> But we are using NFS share and it is
> configured in /etc/dfs/dfstab file.

Is this system the NFS client or server? If you're configuring filesystems in the dfstab file that sounds like the server. AutoFS is strictly a client-side application used to mount NFS filesystems from remote servers. If this system is a server and does not need to mount NFS filesystems from other servers, especially using AutoFS, then it should be safe to disable AutoFS by setting those tunables in the nfsconf file to 0.

Regards,

Dave

Re: automount error

shameemsoft — Tue, 22 Dec 2009 05:18:36 GMT

Thanks Dave.

Most of our HP UNIX servers are act as NFS server & client due to SAP requirement. We are mounting some directory for SAP application requirement using NFS only.

So sometime it act as NFS client & NFS server.

Re: automount error

shameemsoft — Sun, 27 Dec 2009 11:35:03 GMT

Dear,

Any luck on this issue?

Re: automount error

Dave Olker — Thu, 14 Jan 2010 23:35:17 GMT

Hi Shameem,

Are you still experiencing problems or have you resolved this?

Dave

Re: automount error

shameemsoft — Fri, 15 Jan 2010 17:18:09 GMT

Thanks Dave.. still we are facing this issue

No solution. If you have anything please let me know

Re: automount error

Dave Olker — Fri, 15 Jan 2010 18:30:02 GMT

I'm happy to try to resolve this. If this is something you can reproduce at will then I'd like you to enable debug AutoFS logging and capture a couple of these errors. To do this you send a SIGUSR2 signal to the automountd daemon:

# kill -17

This should toggle on debug logging to the file /var/adm/automount.log. Wait until you see a couple instances of the error message you're concerned about and then send another SIGUSR2 to the same pid to toggle debug logging off.

Either post or send me (dave.olker@hp.com) the following files:

/var/adm/automount.log
/etc/auto_master
ANY other autofs map referenced in the auto_master file
/etc/resolv.conf

That should help me get started.

Regards,

Dave

Re: automount error

Tim Nelson — Fri, 15 Jan 2010 19:31:58 GMT

Another option.

turn off automount and put entries in /etc/fstab and be done with it ?

Re: automount error

shameemsoft — Sat, 16 Jan 2010 10:46:16 GMT

Thanks Dave,

Kindly find the automount.log details in the attachment.

#cat /etc/auto_master
/net -hosts -nosuid,soft,nobrowse

we are not using DNS. we are using only /etc/hosts for name resolution.

Thanks Tim for your response.

Re: automount error

Dave Olker — Sat, 16 Jan 2010 17:10:39 GMT

Hi Shameem,

The entire log file is filled with repeating entries like this:

Jan 16 09:21:24 t1 LOOKUP REQUEST: Sat Jan 16 09:21:24 2010
Jan 16 09:21:24 t1 name=usr.scratch[] map=-hosts opts=nosuid,soft,nobrowse path=/net direct=0
Jan 16 09:21:24 t1 mapline: -hosts
Jan 16 09:21:24 t1 do_mapent_hosts: host usr.scratch
Jan 16 09:21:24 t1 ping: usr.scratch timeout=15 request vers=3 min=2
Jan 16 09:21:24 t1 pingnfs FAIL: can't get nfs version
Jan 16 09:21:24 t1 do_lookup1: action=2 wildcard=FALSE error=2
Jan 16 09:21:24 t1 LOOKUP REPLY : status=2

Someone or some application is constantly trying to access the path "/net/usr.scratch" and AutoFS interprets the string "usr.scratch" as the NFS server's hostname. It tries to resolve this host name so it can contact it to discover what filesystems it is exporting.

Something tells me you don't really have a server named "usr.scratch". :)

Does the name "usr.scratch" mean anything significant for the applications you run on this client? Do you have something set incorrectly in one of your environment variables, like PATH or some library pathname variable?

One other comment. AutoFS is an optional product. You're not required to use AutoFS to mount filesystems. Since this entire log file shows no actual MOUNT requests, are you certain you really need to use AutoFS at all? As Tim and others have said, could you configure the NFS filesystems you need in the /etc/fstab file and simply disable AutoFS? Or are there really some NFS filesystem managed by AutoFS used by your applications?

Regards,

Dave

Re: automount error

Dennis Handly — Sun, 17 Jan 2010 01:41:15 GMT

>Dave: Do you have something set incorrectly in one of your environment variables

Or a symlink to /net/usr.scratch.

Re: automount error

shameemsoft — Mon, 18 Jan 2010 08:35:58 GMT

Thanks Dave/Dennis for your response.

We checked our SAP application and didn't access /net/use.scratch from application level.

Also environment variable & other PATH is configured properly.

We dont have hostname like usr.scratch :)

This error is repeating in 4 servers in our environment.

Also we dont have symblic link for /net/usr.scratch as Dennis said.

>>are there really some NFS filesystem managed by AutoFS used by your applications?

I need to cross check whether AUTOFS used by application or not. I will check and get back to you...

But I would like to find out root cause of this issue ;).

Thanks in Advance

Re: automount error

Dennis Handly — Mon, 18 Jan 2010 10:37:11 GMT

>We checked our SAP application and didn't access /net/usr.scratch from application level.

You could use "strings -a" on each of your executables and shlibs and look for "usr.scratch".

You also know it happened at "Jan 16 09:21:24" and other times in your log. What was running then?

You can also use tusc to look at opens.

>Also we don't have symbolic link for /net/usr.scratch as Dennis said.

I assume you used find(1) to search for all symlinks and then grep?

>I would like to find out root cause of this issue

You are trying to open a file in /net/usr.scratch/.

Re: automount error

shameemsoft — Tue, 23 Feb 2010 11:59:42 GMT

Thanks a lot Gentlemen for your response.

Not able to find which application trying to access this share.

Finally I have disabled default map entry.

#/net -hosts -nosuid,soft,nobrowse

Now this error is not repeating..

Thank you all.

Shameem

Re: automount error

shameemsoft — Tue, 23 Feb 2010 12:00:14 GMT

Thank You