Fun with DNS and Java

[orion2012]

Sorry, I know this is a horrible venue for a DNS howto, but I'm stumped.
On SuSE 10.0, most recent installer.

Installing packages

    zimbra-core......zimbra-core-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-ldap......zimbra-ldap-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-logger......zimbra-logger-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-mta......zimbra-mta-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-snmp......zimbra-snmp-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-store......zimbra-store-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-apache......zimbra-apache-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
    zimbra-spell......zimbra-spell-3.1.4_GA_518.SuSE10-20060626141957.i386.rpm...done
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
Operations logged to /tmp/zmsetup.log.2373
Setting defaults...java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
java.net.UnknownHostException: zimbra: zimbra
        at java.net.InetAddress.getLocalHost(InetAddress.java:1308)
        at com.zimbra.cs.localconfig.LC.(LC.java:194)
        at com.zimbra.cs.localconfig.KnownKey.(KnownKey.java:39)
        at com.zimbra.cs.localconfig.LocalConfig.verify(LocalConfig.java:337)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:185)
        at com.zimbra.cs.localconfig.LocalConfig.readConfig(LocalConfig.java:360)
        at com.zimbra.cs.localconfig.LocalConfig.(LocalConfig.java:365)
        at com.zimbra.cs.localconfig.Main.main(Main.java:116)
No results returned for A lookup of zimbra.thehunter.homelinux.net
Checked nameservers:
        192.168.0.1


DNS ERROR resolving zimbra.thehunter.homelinux.net
It is suggested that the hostname be resolveable via DNS
Change hostname [Yes]

Running the following in a JRE I installed for testing (then removed)

import java.net.*;

public class host
{
  public static void main(String[] argv) {
   try
   {
        java.net.InetAddress localMachine = java.net.InetAddress.getLocalHost("zimbra");
        System.out.println ("IP of local machine: " + localMachine.getHostAddress());
    } catch(java.net.UnknownHostException uhe)
    {
        //handle exception
    }
   }
}

returns

IP of local machine: 192.168.0.11

Here's the DNS stuff:

zimbra:~/src # cat /etc/hosts
127.0.0.1       localhost.localdomain localhost
192.168.0.11       zimbra.thehunter.homelinux.net zimbra
zimbra:~/src # dig zimbra

; <<>> DiG 9.3.1 <<>> zimbra
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53312
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zimbra.                                IN      A

;; ANSWER SECTION:
zimbra.                 0       IN      A       192.168.0.11

;; Query time: 8 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Jun 30 16:20:06 2006
;; MSG SIZE  rcvd: 40

zimbra:~/src # dig MX zimbra

; <<>> DiG 9.3.1 <<>> MX zimbra
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2633
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zimbra.                                IN      MX

;; ANSWER SECTION:
zimbra.                 0       IN      MX      1 zimbra.thehunter.homelinux.net.

;; Query time: 2 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Jun 30 16:20:10 2006
;; MSG SIZE  rcvd: 70

zimbra:~/src # dig zimbra.thehunter.homelinux.net

; <<>> DiG 9.3.1 <<>> zimbra.thehunter.homelinux.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38580
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zimbra.thehunter.homelinux.net.        IN      A

;; ANSWER SECTION:
zimbra.thehunter.homelinux.net. 0 IN    A       192.168.0.11

;; Query time: 2 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Jun 30 16:20:27 2006
;; MSG SIZE  rcvd: 64

zimbra:~/src # dig MX zimbra.thehunter.homelinux.net

; <<>> DiG 9.3.1 <<>> MX zimbra.thehunter.homelinux.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8154
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;zimbra.thehunter.homelinux.net.        IN      MX

;; ANSWER SECTION:
zimbra.thehunter.homelinux.net. 0 IN    MX      1 zimbra.thehunter.homelinux.net.

;; Query time: 2 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Jun 30 16:20:33 2006
;; MSG SIZE  rcvd: 94

zimbra:~/src # dig MX thehunter.homelinux.net

; <<>> DiG 9.3.1 <<>> MX thehunter.homelinux.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48574
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; QUESTION SECTION:
;thehunter.homelinux.net.       IN      MX

;; ANSWER SECTION:
thehunter.homelinux.net. 0      IN      MX      50 zimbra.thehunter.homelinux.net.

;; ADDITIONAL SECTION:
zimbra.thehunter.homelinux.net. 0 IN    A       192.168.0.11

;; Query time: 2 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Jun 30 16:21:08 2006
;; MSG SIZE  rcvd: 103

$10,000 dollars to anyone that can tell me why the zimbra JRE can't find my hostname :-)

(not really, but I will be very grateful.)

EDIT:
P.S. ip address of the zimbra machine is 192.168.0.11

2nd EDIT:
found this New to Linux - Zimbra Installation trouble on FC3
simply doing an ./install.sh -u and then restarting the script to install again doesn't work.

[orion2012]

Utterly weird, I reinstalled the domU (yup, Xen) to FC4 with the exact same DNS/host configuration and it worked. Same results from dig as before, simply minus the apparently strange Java behavior of SuSE.

[jholder]

Hi and welcome to the forums,
Sorry to see you're having problems.
I have a couple of questions for you:
1) is 192.168.0.1 an actual DNS server, or does it forward requests to another DNS server?
2) could you run a
>dig zimbra.thehunter.homelinux.net
I'd like to see how it responds to the FQDN

I'm not quite sure this is related to your code. I think it's a DNS issue.

Should this server be publicly reachable? If so, then I fear you do have a problem with DNS. Here is what returned when I tried to lookup your FQDN:
How I am searching:

Searching for zimbra.thehunter.homelinux.net A record at d.root-servers.net [128.8.10.90]: Got referral to G.GTLD-SERVERS.net. [took 7 ms]
Searching for zimbra.thehunter.homelinux.net A record at G.GTLD-SERVERS.net. [192.42.93.30]: Got referral to ns.dyndns.org. [took 88 ms]
Searching for zimbra.thehunter.homelinux.net A record at ns.dyndns.org. [63.208.196.90]: Reports that no A records exist. [took 27 ms]
 
Answer:
No A records exist for zimbra.thehunter.homelinux.net. [Neg TTL=1800 seconds]
 
Details:
ns.dyndns.org. (an authoritative nameserver for homelinux.net.) says that there are no A records for zimbra.thehunter.homelinux.net.
The E-mail address in charge of the homelinux.net. zone is: hostmaster@dyndns.org.

So, if I get the error, it's likely the installer will too.
Thanks
john

[orion2012]

No, it's intranet only server. Mail is forwarded via an external MTA and delivered via fetchmail, although addressing directly to user@thehunter.homelinux.net also works. I'm using zimbra as a plush MUA/hub for a real domain hosted elsewhere. Works fine with FC4. If you'll re-read my first post, I posted the dig results.