strange gethostsbyname error...

[fjramsay1234 at hotmail.com (Frank Ramsay)]

Ok, we reporudced the issue and h_errno is '2' and hstrerror says that is 
"Host name lookup failure" which I think is the TRY_AGAIN condition.  But 
after this point it doesn't correctly resolve until the program is restarted 
(and we need 99.9999% uptime on this, so re-starting isn't an option)

I'll try bracketing it with the sethostent() and endhostent() to see if that 
works but right now I'm at a loss as to why this is happening.

-fjr


>From: "Jerry Feldman" <gaf at blu.org>
>To: discuss at blu.org
>Subject: Re: strange gethostsbyname error...
>Date: Tue, 18 Jun 2002 09:46:00 -0400
>
>What is the errno returned:
>       The variable h_errno can have the following values:
>
>        HOST_NOT_FOUND
>               The specified host is unknown.
>
>        NO_ADDRESS or NO_DATA
>               The requested name is valid but does not have an IP
>               address.
>
>        NO_RECOVERY
>               A non-recoverable name server error occurred.
>
>        TRY_AGAIN
>               A temporary error occurred on an authoritative name
>               server.  Try again later.
>
>
>Also, do you use sethostent() and endhostent();
>
>On 18 Jun 2002 at 13:03, Frank Ramsay wrote:
>
> >
> >
> > I'm down at a client site doing some troubleshooting and I've come 
>across a
> > very strange gethostbyname error.  It's returning NULL on a hostname in 
>the
> > /etc/hosts file.  What happens is when the remote server goes down the
> > client program tries to re-connect every few hundred times though it's 
>main
> > loop.  The idea being it will re-connect when server comes back up.  
>When it
> > first comes up it works, but after an hour or two gethostbyname starts 
>to
> > fail.  Has anyone seen anything like this before?
> > redhat 7.2
> > glibc-2.2.4-19
> >
> >
> > -fjr
> >
> >
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>
>--
>Jerry Feldman <gaf at blu.org>
>Associate Director
>Boston Linux and Unix user group
>http://www.blu.org PGP key id:C5061EA9
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