DNS errors when performing http test
list David Gilmore
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. X Traverse St Providence, RI XXXXX XXX.XXX.XXXX XXX.XXX.XXXX (fax)
list Henrik Størner
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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
list Jeff Newman
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
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On 1/23/06, Henrik Stoerner <user-ce4a2c883f75@xymon.invalid> 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
list Henrik Størner
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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