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Full Discussion: HP-UX DNS issue
Operating Systems HP-UX HP-UX DNS issue Post 302887029 by rbatte1 on Wednesday 5th of February 2014 07:05:23 AM
Old 02-05-2014
My bet is that the defaults mean that the client connection as a whole times out before the DNS failure is noticed and redirected to the secondary DNS. An incoming request is just an IP address, so your server will try to resolve that to a name for you.

Have a closer look at the manual for resolv.conf

The defaults will mean a 20 second timeout, however this might be extended if you have to look up the name of the DNS server than does respond, and that goes to the first one again.

For local sessions, you can also set the environment variables RES_RETRANS & RES_RETRY to something more like 1000 & 1 respectively.


I hope that this helps. It might not be the cause, but it's something we have hit in the past.



Robin
Liverpool/Blackburn
UK
 

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LEARN ABOUT HPUX

rpc.nisd_resolv

rpc.nisd_resolv(1M)													       rpc.nisd_resolv(1M)

NAME

       rpc.nisd_resolv - DNS service daemon for NIS

SYNOPSIS

       file_descriptor]] transport] program_number]

DESCRIPTION

       is  an auxiliary process which provides DNS forwarding service for NIS hosts requests.  The process is started by (NIS server) when invoked
       with the option.  It requires the file to be set up for communication with a DNS nameserver.  The utility can be used to verify	communica-
       tion with a DNS nameserver.  See resolv.conf(4) and nslookup(1).

       Although it is not recommended, can also be started independently with the following options.

   Options
       Uses the specified file descriptor for service

       Runs in foreground.

       Uses the specified transient program
	      number for RPC service procedure.

       Uses the specified transport.

       Operates in verbose mode.
	      Sends output to:

       Operates in verbose mode.
	      Sends output to stdout.

AUTHOR

       was developed by Sun Microsystems, Inc.

FILES

       resolver configuration file.

SEE ALSO

       nslookup(1), ypserv(1M), resolv.conf(4), ypfiles(4).

															       rpc.nisd_resolv(1M)
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