DNS errors when performing http test
I keep getting DNS errors when performing the HTTP test against two W2k3 servers. They are sporadic, and they recover almost immediately. I am using http://host.domain.local for internal DNS structure. Is this the problem? No other HTTP test are failing, such as checking company website.
David Gilmore Consultant Stenhouse Consulting, LLC. 4 Traverse St Providence, RI 02906 401.453.6900 401.454.7581 (fax)
On Mon, Jan 23, 2006 at 02:52:42PM -0500, David Gilmore wrote:
I keep getting DNS errors when performing the HTTP test against two W2k3 servers. They are sporadic, and they recover almost immediately. I am using http://host.domain.local for internal DNS structure. Is this the problem? No other HTTP test are failing, such as checking company website.
DNS failures mean just that - the DNS lookup for "host.domain.local" failed.
Note that Hobbit will perform a DNS lookup of the hostname in the URL, regardless of what host this status is reported for. E.g.
10.0.0.1 myserver.foo.com # http://www.foo.com/
will do a DNS lookup of "www.foo.com" to get the IP-address for the http tests. The "testip" flag has no effect on http tests; if you want to force an http test to use a specific IP-address (and hence avoid the DNS lookup), you can do it like this:
10.0.0.1 myserver.foo.com # http://www.foo.com=192.168.1.7/
This will make the http tests use the 192.168.1.7 address.
Regards, Henrik
Kind of on the same topic, I noticed in my bbtest column:
DNS statistics:
hostnames resolved : 78
succesful : 76
failed : 2
Is there a logfile I can look at to see which 2 failed DNS lookups?
-Jeff
On 1/23/06, Henrik Stoerner <henrik at hswn.dk> wrote:
On Mon, Jan 23, 2006 at 02:52:42PM -0500, David Gilmore wrote:
I keep getting DNS errors when performing the HTTP test against two W2k3 servers. They are sporadic, and they recover almost immediately. I am using http://host.domain.local for internal DNS structure. Is this the problem? No other HTTP test are failing, such as checking company website.
DNS failures mean just that - the DNS lookup for "host.domain.local" failed.
Note that Hobbit will perform a DNS lookup of the hostname in the URL, regardless of what host this status is reported for. E.g.
10.0.0.1 myserver.foo.com # http://www.foo.com/
will do a DNS lookup of "www.foo.com" to get the IP-address for the http tests. The "testip" flag has no effect on http tests; if you want to force an http test to use a specific IP-address (and hence avoid the DNS lookup), you can do it like this:
10.0.0.1 myserver.foo.com # http://www.foo.com=192.168.1.7/
This will make the http tests use the 192.168.1.7 address.
Regards, Henrik
To unsubscribe from the hobbit list, send an e-mail to hobbit-unsubscribe at hswn.dk
On Mon, Jan 23, 2006 at 03:48:32PM -0600, Jeff Newman wrote:
Kind of on the same topic, I noticed in my bbtest column:
DNS statistics:
hostnames resolved : 78
succesful : 76
failed : 2
Is there a logfile I can look at to see which 2 failed DNS lookups?
It doesn't get logged anywhere. You *can* run bbtest-net with the --debug option, and it will spit out a line with DNS lookup failed for HOSTNAME ... for those hosts that fail - among a lot of other debugging output.
Henrik
participants (3)
-
david＠stenhouseconsulting.com
-
henrik＠hswn.dk
-
jeffnewman75＠gmail.com