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fFaiLOG / namebench

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Hung Checking Availability (Could be long congestion-related timeouts?) #74

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
What steps will reproduce the problem?
1. Ran it with and without the GUI
2. App started, but got to "Checking availability of 3040 servers...
[0/40]" and just kept repeating this until it stopped.
3. The "running" button on the GUI was grayed out.

What is the expected output? What do you see instead? NO output. Never saw
browser screen

What version of the product are you using? On what operating system?
1.05/Ubuntu 9.04

Please provide any additional information below.
> All available sources have been parsed.
> Running...
> namebench 1.0.5 is ready!
> Matching "Mozilla Firefox (39084)" to [('firefox', 'Mozilla Firefox',
39084), ('chrome', 'Google Chrome', 25834), (None, 'Alexa Top Global
Domains', 10000)]
> Parsed source type to firefox
> Running...
> Started thread
> Building nameserver objects
> Checking connection quality...
> Congestion detected. Applied 5.00 multiplier to timeouts
> Checking nameserver health
> Building initial DNS cache for 3040 nameservers [40 threads]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]
> Checking availability of 3040 servers... [0/40]

Original issue reported on code.google.com by siegel...@gmail.com on 17 Dec 2009 at 1:26

GoogleCodeExporter commented 8 years ago 
What speed is your internet connection? Were you downloading a lot of things in 
the 
background? How many minutes did you wait? The reason why I ask is this message:

> Congestion detected. Applied 5.00 multiplier to timeouts

5X is the maximum multiplier right now, which says to me that your internet 
connection may be really slow, and that your DNS requests may be timing out. 

In normal conditions, checking the availability of 3040 servers would only take 
5 
seconds. However, in the absolute worst case congestion with the default 
settings, 
this availability check could take 25.3 minutes! I'll admit, I had not thought 
of this 
possibility when setting the default timeouts. If you would like to speed up 
the 
availability and health checks, edit namebench.cfg to read:

health_timeout=2
thread_count=65

That should bring the time for this initial check for the 3040 servers down to 
7.8 
minutes. You could also uncheck the regional servers selection, which brings 
the 
number of servers to check down to 7 or 8. This could still be a bug with the 
congestion code algorithm, but I'm not sure yet.

Original comment by tstromb...@google.com on 17 Dec 2009 at 3:53

GoogleCodeExporter commented 8 years ago 
This is a Clearwire 4G connection, and I was running Namebench at 6 a.m. or so 
and
not downloading anything. Just had my browser open -- not doing anything else. 
For
what it's worth, my previous DSL service from ATT was very spotty, which is why 
I
switched. I closed the terminal after 10 or 12 minutes when it didn't look like
anything was happening. I never got to the benchmarking point.

I made the namebench.cfg changes you recommended and unchecked the regional DNS 
box.
The software ran fine -- took a couple of minutes to tell me Ultra DNS is 126 
percent
faster.

I'll put the original settings back (you'll have to tell me what they are -- I 
didn't
write them down) and let this run for as long as it takes.

Original comment by siegel...@gmail.com on 17 Dec 2009 at 4:17

GoogleCodeExporter commented 8 years ago 
Do you mind testing namebench 1.1b1 to see if it has the same issue? It's 
availability 
checking has been completely overhauled.

Original comment by thomas.r...@gmail.com on 3 Jan 2010 at 11:07

GoogleCodeExporter commented 8 years ago

Original comment by thomas.r...@gmail.com on 26 Jan 2010 at 8:49