Re: [hobbit] Hobbit HTTP Monitor Anomalies

[Buchan Milne <bgmilne (at) staff.telkomsa.net>]

On Thursday 18 June 2009 17:52:03 James Wade wrote:
> We connected up a sniffer. It appears that the
>
> HTTPS request never receives a response. Hobbit is
>
> sending it out, but a reply never occurs.


So, it looks like a network problem.

Did you try to access the site with a browser (e.g. lynx or links) on the 
hobbit server - if it also times out, then you've eliminated Hobbit as being 
the problem.

>
>
>
> James
>
>
>
>   _____
>
> From: James Wade [mailto:jkwade (at) futurefrontiers.com]
> Sent: Thursday, June 18, 2009 9:42 AM
> To: hobbit (at) hswn.dk
> Subject: [hobbit] Hobbit HTTP Monitor Anomalies
>
>
>
> So, last weekend, we had a huge conference call because
>
> two Production HTTPS URL's that we monitor with Hobbit were
>
> getting timeouts exceeding 30 seconds.
>
>
>
> No other URL's on the Hobbit Server that we monitor were
>
> getting any types of timeouts.
>
>
>
> I have two Hobbit Servers, located at two physical sites, Production
>
> & Development. The Production Hobbit Server said that no timeouts
>
> occurred on the two HTTPS URL's. However, the Development Hobbit
>
> Server (which is the primary monitoring server), indicated that the URL's
>
> were timing out.
>
>
>
> So, the only difference appeared to be in the network. However, our
>
> network team looked at the network and showed no latency, and
>
> the placed a sniffer on the Development Hobbit Server and saw all
>
> HTTPS packets coming back without timeouts.
>
>
>
> Early this week, we placed a box that sniffs that network and can monitor
>
> for specific events. In this case, it's connected to the same network as
>
> the Development Hobbit Server, and its monitoring the HTTPS request
>
> to the two URL's.
>
>
>
> Last night, I received timeouts from Hobbit on the URLs, but the sniffer
>
> showed not such timeouts.
>
>
>
> I've checked the Hobbit server,  CPU, Load, Network, all the graphs don't
>
> show any correlation to the timeouts.
>
>
>
> Does anyone have any ideas on this puzzle?
>
>
>
> Thanks..James