LS FAQ

From GEANT2-JRA1 Wiki

Contents

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Installation

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Not configured

  • Q: I tried to compile the latest LS snapshot (perfSONAR-LS-src-snapshot-20060720.tar.gz), but I got the following error: 


$ ant -f build-xmlls.xml build-xmlls

Buildfile: build-xmlls.xml

build-xmlls:
clean-all:

BUILD FAILED

/home/perfsonar/ant/xmlls/xmlls-java-compile-targets.xml:77: The
following error occurred while executing this line:
/home/perfsonar/ant/java-compile-targets.xml:27:
/home/perfsonar/${build} not found.

Total time: 8 seconds
  • A: "ant configure-xmlls" command must be used first of all. So: 
$ cd $PERFSONAR/ant
$ cp build-xmlls.xml build.xml
$ ant configure-xmlls
$ ant build-xmlls

$ ant deploy-xmlls
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Problems

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Invocation Target Exception

  • Q: I get InvocationTargetException while running SOAP client and requesting LS action.
  • A: Not all required jars were copied to Axis lib directory ($TOMCAT/webapps/axis/WEB-INF/lib). Fix this and the problem shouldn't be encountered.
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NullPointerException

  • Q: While running client application (i.e. ant ls-run-client), I get NullPointerException; why?
  • A: Did you follow the LS instalation guide? NullPointerException may be caused by various reasons. The most common one is that you haven't defined the path to components.properties and service.properties files in your $TOMCAT/conf/catalina.properties. Check #Step 11 - catalina.properties.
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Exist DB XML: "No such namespace for ..." problem

  • Q: I get "No such namespace for [a_namespace]" exception while sending XPath requests to eXist DB XML. My Lookup Service doesn't work well because of that.
  • A: Exist query language is XQuery, not XPath. XPath relies on namespace definitions from outside, but you must define namespaces if using XQuery langiage. So that you should use 
 declare namespace a_namespace="http://a_namespace.declaration/...";

before your XQuery/XPath expression. You may also use "*" instead of full namespace name (i.e., 

 /*:element

instead of /namespace:element ), but the meaning is not always the same.

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