perfSONAR User Q&A and Other Discussion

[Jason Zurawski <>]

Manuel;

The first message exchange is normal: the GUI is asking the LS to format 
the result data in a special way and the LS is replying that it can't.

The second exchange indicates a cryptic error; I recently fixed a bug 
with this GUI to try to eliminate this error, and the fix appears to 
work for other Java hLS instances (e.g. see here: 
http://dc211.internet2.edu/cgi-bin/perfSONAR/view.cgi?hls=http://mdm1.usatlas.bnl.gov:8080/geant2-java-xml-ls/services/LookupService) 
so I am inclined to think that your service may have a problem instead 
of the GUI.

I am not the developer of the Java LS, but here are some questions you 
can try to answer to figure out what the error may indicate:

1) Is eXist configured properly?  This error can mean that the interface 
between eXist and the LS is not functioning properly either due to 
configuration of the services or something external (a firewall maybe?)

1.5) There is a self test that can be run by sending a simple message to 
the LS:

https://wiki.man.poznan.pl/perfsonar-mdm/index.php/LS_echo-results

Hint: I sent the message to test the database and got the same error you 
are seeing.

2) Does the database have data?  There is a client application you can 
log in to and examine the eXist collections (located here, use your 
admin username/password: 
http://perfsonar.nren.ro:8080/exist/webstart/exist.jnlp).  If I remember 
correctly the collection is called just 'ls'.  If there is nothing in 
this collection it could indicate a problem with configuration.

Hope this helps;

-jason


> I know is not a good sign to reply to my own mails but I have more
> information about this. I captured the packets (using tcpdump) sent to
> our hLS and I found out that actually, our perfSONAR sends back 2 messages:
>
> <first message>
>
> <?xml version="1.0" encoding="UTF-8"?><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
> id="message.5115001_resp" messageIdRef="message.5115001"
> type="LSQueryResponse"
> xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";><nmwg:metadata
> id="resultCodeMetadata"><nmwg:eventType>error.ls.query.ls_output_not_accepted</nmwg:eventType></nmwg:metadata><nmwg:data
> id="resultDescriptionData_for_resultCodeMetadata"
> metadataIdRef="resultCodeMetadata"><nmwgr:datum
> xmlns:nmwgr="http://ggf.org/ns/nmwg/result/2.0/";>This version of LS
> supports only [escaped] results of xquery (by default). You used
> [native]
> value.</nmwgr:datum></nmwg:data></nmwg:message></soapenv:Body></soapenv:Envelope>
>
> </first message>
>
> <second message>
>
> <?xml version="1.0" encoding="UTF-8"?><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
> id="message.13104590_resp" messageIdRef="message.13104590"
> type="LSQueryResponse"
> xmlns:nmwg="http://ggf.org/ns/nmwg/base/2.0/";><nmwg:metadata
> id="resultCodeMetadata"><nmwg:eventType>error.common.storage.xmldb.open</nmwg:eventType></nmwg:metadata><nmwg:data
> id="resultDescriptionData_for_resultCodeMetadata"
> metadataIdRef="resultCodeMetadata"><nmwgr:datum
> xmlns:nmwgr="http://ggf.org/ns/nmwg/result/2.0/";>XQuery by HTTP failed.
> Could not connect to eXist via pure http,  nested exception was: class
> java.net.ConnectException : Connection
> refused</nmwgr:datum></nmwg:data></nmwg:message></soapenv:Body></soapenv:Envelope>
>
> </second message>
>
>
>
> Manuel SUBREDU wrote:
> > Hi,
> >
> > when I go to [1] and click on the url of our perfsonar (nren.ro), I get
> > the following errors.
> > <quote>
> > Collection:
> > http://ogf.org/ns/nmwg/tools/org/perfsonar/service/lookup/query/xquery/2.0
> > Store Type: LSStore
> >
> > EventType:      error.common.storage.xmldb.open
> > Response:       XQuery by HTTP failed. Could not connect to eXist via pure
> > http,  nested exception was: class java.net.ConnectException :
> > Connection refused
> >
> > EventType:      error.common.storage.xmldb.open
> > Response:       XQuery by HTTP failed. Could not connect to eXist via pure
> > http,  nested exception was: class java.net.ConnectException :
> > Connection refused
> >
> > </quote>
> >
> > I do not understand what is the error. I have the exist databases
> > available on perfsonar.nren.ro:8080/exists/ . Could you point me into
> > the rigth direction ?
> >
> > [1] - http://dc211.internet2.edu/cgi-bin/perfSONAR/tree.cgi
> >
> >  Thanks,