On Fri, Feb 18, 2005 at 07:38:44PM -0500, Vinny Abello wrote:
 
> 	I seem to get ongoing weird results with this monitor. I can manually run 
> dig countless times with success against DNS servers but letting it run as 
> a probe through smokeping records data of ~25% loss to pretty much all name 
> servers. This is on a FreeBSD 5.3 system. All other probes seem to work 
Hi,

try if the attached patch helps. It's going to be in the next release.

Apparently some platforms, at least Solaris, set the select() exception
flag on a pipe file descriptor if the process at the other end has
already exited. The select handling code in lib/probes/basefork.pm
isn't prepared for that, and treats it as an error condition.

Linux, Digital Unix (or whatever it's nowadays called), and HP-UX don't
do this, but FreeBSD might. I guess I should install a *BSD somewhere
just for testing...

> One other question not quite related... When using the http or smtp probe 
> utilizing Echoping, when does the monitor end recording the time it took 
> for the "ping" to take place? In other words, what designates the value 
> recorded? Is it retreiving the full page at a given url with EchoPingHttp? 
> Is it getting a 220 banner back from the SMTP server with the EchoPingSmtp 
> probe?

EchoPingHttp just calls echoping(1) with the '-h' argument, and
EchoPingSmtp with '-S', and uses the timestamp echoping returns. In the
SMTP case, it looks like it just sends QUIT immediately and sees how
long it takes for the connection to close. In the HTTP case it's
downloading the full page.

The echoping source code is authoritative on this, of course, so look
there if you really need to know :)
-- 
niko


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