perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

Hi Winnie,

CCing Shawn McKee, since I think you will need him to update the mesh 
configuration file this host uses. I found a few things:

- Disabling the firewall got rid of the peer port issue. I think if you open 
6001-6200 TCP and UDP you should be set to turn it back on. 

- I was also able to reach your web page which allowed me to look at the mesh 
config file you are using at 
https://myosg.grid.iu.edu/pfmesh/mine/hostname/lcgnetmon02.phy.bris.ac.uk. 
The way this is configured, you are only running BWCTL throughput tests to 
hosts in the UK. You then have a very large mesh of traceroute tests you are 
running. That means for a whole bunch of those hosts listed on the graph page 
I wouldn’t expect any throughput data. My guess is that this is expected, but 
just pointing it out in case it’s not. 

- For the throughput tests to the UK, most of those are failing and I think i 
see why (this is where we need Shawn). Your test configuration has the 
omit_interval set to 5 seconds and the duration set to 30. This is actually a 
35 second test which is above the time limit of 30 seconds BWCTL allows by 
default. Thus the tests are getting rejected. This was actually a fix (I 
believe made around the April 26th date you noted prior) as previously BWCTL 
was only treating this as a 30 second test which was incorrect. The fix is to 
have Shawn change the “duration” in the meshconfig to 25, which will make it 
a true 30 second test within the BWCTL limits.

I think the summary is there are two problems 1) The firewall ports and 2) 
the test duration + omit_interval exceeding the BWCTL limit after a recent 
update. Hopefully resolving those will get things working.

Thanks,
Andy






> On May 20, 2015, at 6:55 AM, Winnie Lacesso 
> <>
>  wrote:
> 
> 
> Thank you Andy, this is very helpful!
> 
> Earlier:
>> I can't seem to reach lcgnetmon02.phy.bris.ac.uk or run bwctl tests to it
>> from any host. My guess would be you have some firewall issues. The red 
> 
> For a time, the entire BW box firewall is shutdown. No firewall!
> (eeeek!)
> 
> Can you try reaching lcgnetmon02.phy.bris.ac.uk or run bwctl tests to it 
> again? 
> 
> While no firewall, still errors of the kind you named are being seen in
> /var/log/perfsonar/regular_testing.log:
> 
> 2015/05/20 11:53:17 (3326) ERROR> MeasurementArchiveChild.pm:125 
> perfSONAR_PS::RegularTesting::Master::MeasurementArchiveChild::__ANON__ - 
> Problem handling test results: Problem storing results: Error writing 
> metadata: Error running test from perfsonar02.datagrid.cea.fr to 
> lcgnetmon02.phy.bris.ac.uk  with output bwctl: start_endpoint: 
> 3628747485.110260
> bwctl: run_endpoint: receiver: 137.222.171.39
> bwctl: run_endpoint: sender: 192.54.207.251
> bwctl: Unable to initiate peer handshake with [137.222.171.39]:6033 - 
> canceling
> bwctl: stop_endpoint: 3628747487.112685
> 
> So how can the firewall be the problem, if it's off?
> 
> Can you advise how further to debug what the problem is, if it's not 
> firewall?
> 
> Very Grateful!!
> 
>