perfSONAR User Q&A and Other Discussion

[Stijn Melis <>]

Hi Christian,

Rodesch Christian wrote:
> Hi,
>
> I already installed the SSHTelnet MP from perfsonar 2.2 and in
> combination with the Looking Glass client, it worked quite well.
> Now, I installed the new Service of perfSONAR 3.0 and I only got a lot
> of problems:
>
> 1) The Web IF is not working, if I open the URL, the main page appears
> like it should,but if I click on any link like Basic Setup, I get this
> message:
>
> HTTP Status 500 -
>
> type Exception report
>
> message
>
> description The server encountered an internal error () that prevented
> it from fulfilling this request.
>
> exception
>
> javax.servlet.ServletException: Error instantiating servlet class
> perfSONARWebAdmin.admin.wizard.Wizard
>         
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>         
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
>         
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>         
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>         
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>         java.lang.Thread.run(Thread.java:595)
>
> root cause
>
> java.lang.NullPointerException
>         
> org.apache.catalina.loader.WebappClassLoader.findResourceInternal(WebappClassLoader.java:1967)
>         
> org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1759)
>         
> org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:872)
>         
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1327)
>         
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206)
>         java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>         java.lang.Class.getDeclaredConstructors0(Native Method)
>         java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
>         java.lang.Class.getConstructor0(Class.java:2671)
>         java.lang.Class.newInstance0(Class.java:321)
>         java.lang.Class.newInstance(Class.java:303)
>         
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>         
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
>         
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>         
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>         
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>         java.lang.Thread.run(Thread.java:595)
>
> note The full stack trace of the root cause is available in the Apache
> Tomcat/6.0.16 logs.
> Apache Tomcat/6.0.16
>
>
> The log shows me the following:
>
> 2008-05-27 16:01:31,692 DEBUG - In AxisServletBase init
> 2008-05-27 16:01:31,705 DEBUG - Enter: getEngine()
> 2008-05-27 16:01:31,717 DEBUG -
> getBundle(org.apache.axis,org.apache.axis.i18n,resource,null,...)
> 2008-05-27 16:01:31,726 DEBUG - loadBundle: Ignoring
> MissingResourceException: Can't find bundle for base name
> org.apache.axis.resource, locale en_US
> 2008-05-27 16:01:31,726 DEBUG - Created org.apache.axis.i18n.resource,
> linked to parent null
> 2008-05-27 16:01:31,727 DEBUG -
> getBundle(org.apache.axis,org.apache.axis.utils,resource,null,...)
> 2008-05-27 16:01:31,729 DEBUG - loadBundle: Ignoring
> MissingResourceException: Can't find bundle for base name
> org.apache.axis.utils.resource, locale en_US
> 2008-05-27 16:01:31,729 DEBUG - loadBundle: Ignoring
> MissingResourceException: Can't find bundle for base name
> org.apache.axis.resource, locale en_US
> 2008-05-27 16:01:31,729 DEBUG - Root package not found, cross link to
> org.apache.axis.i18n.resource
> 2008-05-27 16:01:31,729 DEBUG - Root package not found, cross link to
> org.apache.axis.i18n.resource
> 2008-05-27 16:01:31,729 DEBUG -
> org.apache.axis.i18n.resource::handleGetObject(engineFactory)
> 2008-05-27 16:01:31,729 DEBUG - Got EngineFactory:
> org.apache.axis.configuration.EngineConfigurationFactoryServlet
> 2008-05-27 16:01:31,732 DEBUG -
> org.apache.axis.i18n.resource::handleGetObject(readOnlyConfigFile)
> 2008-05-27 16:01:31,732  INFO - Configuration file read-only so engine
> configuration changes will not be saved.
> 2008-05-27 16:01:31,736 DEBUG - Enter: DefaultAxisServerFactory::getServer
> 2008-05-27 16:01:31,736 DEBUG - Enter:
> DefaultAxisServerFactory::getEngineConfiguration
> 2008-05-27 16:01:31,736 DEBUG - Exit:
> DefaultAxisServerFactory::getEngineConfiguration
> 2008-05-27 16:01:31,738 DEBUG - Enter: AxisEngine::init
> 2008-05-27 16:01:32,076 DEBUG -
> org.apache.axis.i18n.resource::handleGetObject(attachEnabled)
> 2008-05-27 16:01:32,076 DEBUG - Attachment support is enabled?  true
> 2008-05-27 16:01:32,092 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory(class java.lang.String,
> {http://xml.apache.org/xml-soap}PlainText)
> 2008-05-27 16:01:32,094 DEBUG -
> org.apache.axis.i18n.resource::handleGetObject(oddDigits00)
> 2008-05-27 16:01:32,094 DEBUG -
> org.apache.axis.i18n.resource::handleGetObject(badChars01)
> 2008-05-27 16:01:32,136 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory(class java.awt.Image,
> {http://xml.apache.org/xml-soap}Image)
> 2008-05-27 16:01:32,137 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory(class
> javax.mail.internet.MimeMultipart,
> {http://xml.apache.org/xml-soap}Multipart)
> 2008-05-27 16:01:32,138 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory(interface javax.xml.transform.Source,
> {http://xml.apache.org/xml-soap}Source)
> 2008-05-27 16:01:32,139 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory(class
> org.apache.axis.attachments.OctetStream,
> {http://xml.apache.org/xml-soap}octet-stream)
> 2008-05-27 16:01:32,139 DEBUG - Enter/Exit:
> JAFDataHandlerDeserializerFactory()
> 2008-05-27 16:01:32,196 DEBUG - Exit: AxisEngine::init
> 2008-05-27 16:01:32,196 DEBUG - Exit: DefaultAxisServerFactory::getServer
> 2008-05-27 16:01:32,196 DEBUG - Exit: getEngine()

Honestly, I have no idea what is causing this. Did you use the war, rpm 
or deb file? Which log file are you talking about, because there are 
several?
Maybe Michalis can give some more information about this too, since he 
is responsible for the WebAdmin.

> 2) Therefore I configured everything by hand, the service.properties and
> the xml file. I also uploaded the file to the eXist database. When I
> then open the Looking Glass it depends on my luck whether I get the
> configured router and the commands,or if I get a popup with an error
> message. So the fact that once or twice I got the list with the commands
> I wrote in the xml file, shows that the xml is ok and correctly uploaded
> to the eXist database.

The password for the devices should be encrypted in Base64. You can use 
the SSHTELNET MP configuration tool for this. You can find it here:

http://wiki.perfsonar.net/jra1-wiki/index.php/SSH-Telnet-download#Configuration_script_to_be_used_together_with_version_1.3

If you entered the password in plain text in the metadata configuration 
file, it will not work. You will however still see the devices and 
commands like you do now, but they won't work.

About the Looking Glass: I am aware that it is not working properly as 
it should and that is gives too much errors when trying to do something. 
I am busy integrating the Looking Glass into psUI, so you will have a 
new version to use very soon.


> 3) As I used the SSHTelnet service of perfsonar bundle 2.2, I miss the
> option to chose whether to connect by Telnet or SSH in the xml meta data
> file. Is there an xml element for this?

This is still there. If you use the configuration tool I mentioned 
above, you will still have the same options as in 2.2 (it's actually the 
same script, but on a standalone basis). However, if you want to change 
it manually, you have to change the class_name element. For example, for 
a Cisco Telnet connection you have to enter:

org.perfsonar.service.measurementPoint.lookingGlassType.engine.adapters.CiscoAdapter

other possibilities are:

org.<...>.adapters.CiscoSshAdapter   -> Cisco/SSH
org.<...>.adapters.CiscoKeyAdapter   -> Cisco/SSH with a key
org.<...>.adapters.JuniperAdapter    -> Juniper/Telnet
org.<...>.adapters.JuniperSshAdapter -> Juniper/SSH
org.<...>.adapters.JuniperKeyAdapter -> Juniper/SSH with a key

Please not however that if you change the type of connection, some other 
parameters will get a different meaning. For example, if you use a Key, 
the password parameter has no meaning, and should be replaced by a 
keyUrl parameter, which specifies the path to the key, and you could 
also add a passphrase parameter, which indicates a possible password for 
your key.

So, to make it short, I'd advise you to use the configuration tool, 
since this will solve the problem with the Base64 encoding of the 
password, as well as ask you all the right questions according to the 
chosen type of connection/device.


> I hope I'm not bothering you too much, but I really like the concept of
> perfSONAR and I'm trying my best to get the services to work.
>
> Regards,
>
> Christian

Regards,

Stijn