http checking return "DNS error" message

[T.J. Yang]

Recently I have a DNS servers change on hobbit server. Ever since then http service checking are Tue Jul 29 14:56:47 2008     

So far I have done following.

1. make sure dns is in /etc/nsswitch.conf host entry.
2. ping terminal.sub.test.com works.
3. /etc/resolv.conf is configured with new dns servers and their ips.
4.  clean out "/var/opt/hobbitserver42/tmp/*..status files and restart hobbit server.

Is there any better way to debug the issue ?

1. Example error message.

Wed Jul 30 07:50:51 2008: DNS error

http://terminal.sub.test.com/ - DNS error


Seconds:     0.00

2. The batch http checking showing flip-flop on all the machines with http checking.

Tue Jul 29 14:56:47 2008        terminal.sub.test.com   http    red From -> To  green
Tue Jul 29 14:56:47 2008        ltelinux3-sol.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        ltelinux2-sol.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        itsupport.corp.test.com         http    red From -> To  green
Tue Jul 29 14:56:47 2008        isdweb1.sub.test.com    http    red From -> To  green
Tue Jul 29 14:56:47 2008        isdeclinux3-rsa.sub.test.com    http    red From -> To  green
Tue Jul 29 14:56:47 2008        isdeclinux2-rsa.sub.test.com    http    red From -> To  green
Tue Jul 29 14:56:47 2008        isdeclinux1-rsa.sub.test.com    http    red From -> To  green
Tue Jul 29 14:56:47 2008        dd403.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        dd402.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        dd401.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        dd400.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        li66nsdbm.test.com      http    red From -> To  green
Tue Jul 29 14:56:47 2008        iclinux01-sol.corp.test.com     http    red From -> To  green
Tue Jul 29 14:56:47 2008        hobbit2.sub.test.com    http    red From -> To  green
Tue Jul 29 14:56:47 2008        bs713.sub.test.com      http    red From -> To  green
Tue Jul 29 14:56:20 2008        terminal.sub.test.com   http    green From -> To        red
Tue Jul 29 14:56:20 2008        ltelinux3-sol.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        ltelinux2-sol.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        itsupport.corp.test.com         http    green From -> To        red
Tue Jul 29 14:56:20 2008        isdweb1.sub.test.com    http    green From -> To        red
Tue Jul 29 14:56:20 2008        isdeclinux3-rsa.sub.test.com    http    green From -> To        red
Tue Jul 29 14:56:20 2008        isdeclinux2-rsa.sub.test.com    http    green From -> To        red
Tue Jul 29 14:56:20 2008        isdeclinux1-rsa.sub.test.com    http    green From -> To        red
Tue Jul 29 14:56:20 2008        dd403.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        dd402.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        dd401.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        dd400.sub.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        li66nsdbm.test.com      http    green From -> To        red
Tue Jul 29 14:56:20 2008        iclinux01-sol.corp.test.com     http    green From -> To        red
Tue Jul 29 14:56:20 2008        hobbit2.sub.test.com    http    green From -> To        red
Tue Jul 29 14:56:20 2008        bs713.sub.test.com      http    green From -> To        red






T.J. Yang

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