perfSONAR User Q&A and Other Discussion

[Rodesch Christian <>]

Hi everyone,

As I could not stop to look for this weird error, I did again some 
debugging and I found out the following:

I made two distinct measurement with perfSonar UI. The first was a 
measurement with the CARNET bwctl MP service as source and our local 
bwctl MP "eomer.restena.lu" as destination. The second measurement was a 
fully local one, this means between two hosts of our network, to be 
precise with detective.restena.lu as source and eomer.restena.lu as 
destination. Both tests were 10 second TCP measurements. I logged the 
transmitted XML files using wireshark and here's what I discovered:

The request XML is the same except for the differing IP addresses BUT 
the response XML files differ:

Here's the one from the first test:

   HTTP/1.1 200 OK
   Date: Wed, 21 May 2008 07:34:57 GMT
   Server: libwww-perl-daemon/1.36
   Content-Length: 1459
   Content-Type: text/xml; charset=utf-8
   SOAPServer: SOAP::Lite/Perl/0.66

   <?xml version="1.0" encoding="UTF-8"?>

   <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
   xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/";
   xmlns:xsd="http://www.w3.org/2001/XMLSchema";
   soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";
   xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";>

   <soap:Body xsi:type="xsd:anyURI">

   <nmwg:message
   xmlns="http://ggf.org/ns/nmwg/tools/org/perfsonar/1.0/";
   xmlns:nmtm="http://ggf.org/ns/nmwg/time/2.0/";
   xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";
   xmlns:nmwgt="http://ggf.org/ns/nmwg/topology/2.0/";
   xmlns:perfsonar="http://ggf.org/ns/nmwg/tools/org/perfsonar/1.0/";
   xmlns:select="http://ggf.org/ns/nmwg/ops/select/2.0/"; id="datarq2-1"
   type="SetupDataResponse">

     <nmwg:metadata id="meta1">
       <perfsonar:subject id="subj1">
         <nmwgt:endPointPair>
           <nmwgt:src type="ipv4" value="193.198.229.166"/>
           <nmwgt:dst type="ipv4" value="158.64.56.218"/>
         </nmwgt:endPointPair>
       </perfsonar:subject>

       <nmwg:eventType>bwctl</nmwg:eventType>
       <nmwg:parameters id="param1">
       <nmwg:parameter xmlns:nmwg="nmwg" name="protocol"
   value="TCP"/></nmwg:parameters>
     </nmwg:metadata>

     <!-- triggers to indicate head of chains -->
     <nmwg:data id="1" metadataIdRef="meta1"><nmwg:datum
   numBytesUnits="Bytes" value="257960679" numBytes="327237632"
   time="1211355281" valueUnits="bits/sec"
   duration="0.0-10.1"/></nmwg:data>


   </nmwg:message>
   </soap:Body></soap:Envelope>

And here's the one from the second test:

   HTTP/1.1 200 OK
   Date: Wed, 21 May 2008 07:38:04 GMT
   Server: libwww-perl-daemon/5.810
   Content-Length: 1303

   <soapenv:Envelope
   xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
   xmlns:xsd="http://www.w3.org/2001/XMLSchema";
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
   <soapenv:Body>

   <nmwg:message
   xmlns="http://ggf.org/ns/nmwg/tools/org/perfsonar/1.0/";
   xmlns:nmtm="http://ggf.org/ns/nmwg/time/2.0/";
   xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";
   xmlns:nmwgt="http://ggf.org/ns/nmwg/topology/2.0/";
   xmlns:perfsonar="http://ggf.org/ns/nmwg/tools/org/perfsonar/1.0/";
   xmlns:select="http://ggf.org/ns/nmwg/ops/select/2.0/";
   xmlns:nmwg1="nmwg" id="datarq2-1" type="SetupDataResponse">

     <nmwg:metadata id="meta1">
       <subject id="subj1">
         <nmwgt:endPointPair>
           <nmwgt:src type="ipv4" value="158.64.56.218"/>
           <nmwgt:dst type="ipv4" value="158.64.56.116"/>
         </nmwgt:endPointPair>
       </subject>

       <nmwg:eventType>bwctl</nmwg:eventType>
       <nmwg:parameters id="param1">
       <nmwg1:parameter xmlns:nmwg="nmwg" name="protocol"
   value="TCP"/></nmwg:parameters>
     </nmwg:metadata>

     <!-- triggers to indicate head of chains -->
     <nmwg:data id="1" metadataIdRef="meta1"><datum
   numBytesUnits="Bytes" timeType="unix" numBytes="64364544"
   value="51300766" valueUnits="bits/sec" duration="0.0-10.0"
   timeValue="1211355467"/></nmwg:data>


   </nmwg:message></soapenv:Body></soapenv:Envelope>


Now what's weird is that the second XML is differing in many point from 
the first one:

- the XML header is totally missing
- the Http header is missing the content type: (Content-Type: text/xml; 
charset=utf-8 SOAPServer: SOAP::Lite/Perl/0.6)
- Many xml attributes miss their namespaces or the namespaces differ in 
the 2 xml files
- The time attributes are totally different, the one files uses a simple 
"time" attribute whereas the other uses "timetype" and "timevalue"

So I think this must be the cause of the problem why perfSONAR UI does 
show a blank result screen as the parser does not recognize the XML 
format of the response message or looks for the wrong attributes

BTW I have installed the BWCTL MP CPAN modules from this url ( 
http://wiki.perfsonar.net/jra1-wiki/index.php/BWCTL_and_OWAMP_MP)

I hope anybody can fix this, or point me to a newer version.

Regards,
Christian