Re: ERROR James: Cannot get IP address(es) for domain.name

[BJ <bj...@free-man.com>]

linux is different than Windows.
It is looking in the host file for your localhost server, not DNS.

do a ifconfig to see if you have any DNs Server Assigned.
if you have a firewall make sure that DNS can be received by the server.
you can also do a
netstat -an
and see if your sever is connection to port 53



A. Rothman sent the following on 6/29/2009 4:41 AM:
> Hi,
> 
> 
> I'm migrating JAMES (2.3.1) from Windows to Ubuntu Jaunty, installed as
> a daemon following the guidelines in the james wiki, and seem to have
> some DNS problems. If started from the command line, everyting runs
> fine. But when started by a reboot, the dnsserver* log show that no dns
> server was auto-detected, as well as java.net.PortUnreachableExceptions
> when trying to send a message, and the james* log shows the error:
> "ERROR James: Cannot get IP address(es) for domain.name". I tried to
> workaround this by explicitly specifying the dns server in the
> configuration, and now sending messages works ok (no exception), but the
> latter error remains. So -
> 
> 
> 1. What reasons might it have to fail at dns  autodiscovery only during
> boot time?
> 
> 2. Is the error "Cannot get IP address(es) for domain.name" really an
> error? What implications might this have? Since with the explicitly
> configured dns server, both sending and receiving messages seem to be ok
> even with the error shown...
> 
> 3. Is the dns component really a dns server (as the log name implies)?
> or a dns client? Should I configure the firewall for a dns server?
> 
> 
> Any help would be much appreciated :-)
> 
> 
> Amichai
> 
> 
> 


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Re: ERROR James: Cannot get IP address(es) for domain.name

["A. Rothman" <am...@amichais.net>]

BJ wrote:

> linux is different than Windows.
>   
sure is :-)
> It is looking in the host file for your localhost server, not DNS.
>   
When I configure the nameserver explicitly in James, lookup of remote 
hosts succeeds but lookup of configured servernames fails - but these 
are also available via dns, so shouldn't this work identically for 
remote/local host lookup?

I just took a quick look at the code to see why/how it does the lookup, 
and found that the code producing the error uses 
InetAddress.getAllByName - shouldn't it be using 
org.apache.james.dnsserver.DNSServer.getAllByName which is used 
elsewhere successfully? isn't this effectively ignoring the configured 
dns server? is this a bug?

Incidentally, a comment in the same code answered my question #2 - it 
claims to use the resolved addresses to support delivery to 
<us...@address-literal> as required by the RFC. But I've never seen 
literal addresses used in practice, so I feel somewhat more comfortable 
using the workaround for now.
> do a ifconfig to see if you have any DNs Server Assigned.
>   
I don't see anything in ifconfig related to DNS - what should I be 
looking for?
> if you have a firewall make sure that DNS can be received by the server.
> you can also do a
> netstat -an
> and see if your sever is connection to port 53
>   
As a dns client, nslookup works fine, as does the remote delivery in 
James when I manually configure the nameserver - so I don't think this 
is a firewall problem.

Or do u mean James does in fact try to act as a dns *server*?


Thanks for your help!
>
> A. Rothman sent the following on 6/29/2009 4:41 AM:
>   
>> Hi,
>>
>>
>> I'm migrating JAMES (2.3.1) from Windows to Ubuntu Jaunty, installed as
>> a daemon following the guidelines in the james wiki, and seem to have
>> some DNS problems. If started from the command line, everyting runs
>> fine. But when started by a reboot, the dnsserver* log show that no dns
>> server was auto-detected, as well as java.net.PortUnreachableExceptions
>> when trying to send a message, and the james* log shows the error:
>> "ERROR James: Cannot get IP address(es) for domain.name". I tried to
>> workaround this by explicitly specifying the dns server in the
>> configuration, and now sending messages works ok (no exception), but the
>> latter error remains. So -
>>
>>
>> 1. What reasons might it have to fail at dns  autodiscovery only during
>> boot time?
>>
>> 2. Is the error "Cannot get IP address(es) for domain.name" really an
>> error? What implications might this have? Since with the explicitly
>> configured dns server, both sending and receiving messages seem to be ok
>> even with the error shown...
>>
>> 3. Is the dns component really a dns server (as the log name implies)?
>> or a dns client? Should I configure the firewall for a dns server?
>>
>>
>> Any help would be much appreciated :-)
>>
>>
>> Amichai
>>
>>
>>
>>     
>
>
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