resolver issue

[HPP]

Hi,
We have 4 HP-UX 11.00 servers. Each one of them runs apache web server and we have switch does a health check every 5 seconds on these servers. For each health check, web server tries to query internal DNS for A record and PTR. To avoid DNS query i have made entry for switch (for example switch.mydoamin.com and 192.168.32.3) in /etc/hosts of the each web server and
/etc/resolv.conf looks like this on web server:

domain mydomain.com
nameserver 192.192.1.10

and /etc/nsswitch.conf looks like this:
hosts: files [NOTFOUND=continue] dns

Why does the resolver tires to query DNS server, inspite of having an entry in /etc/hosts and nsswitch.conf says to query files and then query DNS?

I even tried putting some IP address in /etc/resolv.conf which is not actually an IP address of a DNS server and then tried to do

#nslookup switch.mydoamin.com

thats it nslookup hangs in there and tries look for DNS. The entry is already there in /etc/hosts for switch.domain.com and resolver is not looking into files first.

On DNS server the log file is getting filled like crazy.

Thanks in advance for any input.

[John Dvorchak]

Is /etc/hosts permissions at least 444 r--r--r--?

[Martin Johnson]

Have you tried:

ps -ef | grep inetd
kill -HUP inetd_pid


HTH
Marty

[Rainer von Bongartz]

Try putting this in nsswitch.conf

hosts: files[NOTFOUND=continue UNAVAIL=continue] dns [NOTFOUND=return UNAVAIL=continue TRYAGAIN=continue]

Regards
Rainer

[HPP]

Hi,
the permission on /etc/hosts /etc/nsswitch.conf and /etc/resolv.conf was -r--r--r--

I did kill -HUP inetd_pid, but no luck.

Thanks

[John Dvorchak]

Although not likley, it is possible that you /etc/hosts file is corrupt or has a bad entry. Can you mv the hosts file and create a new one with just:
127.0.0.1 localhost
192.xxx.xxx.xxx your.real.address
192.168.32.3 switch.mydomain.com switch

Then nslookup switch and then switch.mydomain.com

[HPP]

Rainer,
I tried entry
hosts: files[NOTFOUND=continue UNAVAIL=continue] dns [NOTFOUND=return UNAVAIL=continue TRYAGAIN=continue]

in /etc/nsswitch.conf and no luck.

Thanks

[Uday_S_Ankolekar]

rename resolv.conf and see what happens.

[HPP]

John Dvorchak,
Recreated the /etc/hosts file. Same problem with querying.

Thanks

[Rainer von Bongartz]

Does it work if you only have the entry

hosts: file

in nwswitch.conf ???


Regards
Rainer

[Sergejs Svitnevs]

Try to debug syntactic errors in the switch configuration file using "nslookup -swdebug" command.

Regards,
Sergejs

[Wilfred Chau_1]

do you have switch.domain.com or
switch.mydomain.com?

what is the output of nslookup switch.mydomain.com?

Something like the below?
> nslookup switch.mydomain.com
Using /etc/hosts on:

looking up FILES
*** No address information is available for "switch.mydomain.com"