Frequently Asked Questions

Adaptor module

  1. How do I use this module ?

Execution management

  1. How to get rid of this error message: 
    org.glite.security.util.FileEndingIterator : Error while reading directory null
  2. How can I pass JDL atttributes that have no equivalent in SAGA specification ?
  3. What is the URL syntax understood by this plug-in ?
  4. How to get the name of the CE chosen by the WMS ?
  5. How to get the name of the worker node where the job is running ?

Adaptor module

How do I use this module ?
The command "jsaga-help" provides some useful information about the usage and the current configuration of the plug-ins. 
jsaga-help -help
If this command does not provides the answer to your question, then please contact us so that we can fill out this FAQ.

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Execution management

How to get rid of this error message: 
org.glite.security.util.FileEndingIterator : Error while reading directory null
Add this line to your LOG4J configuration file ($JSAGA_HOME/etc/log4j.properties by default): 
log4j.logger.org.glite.security.util.FileEndingIterator=FATAL

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How can I pass JDL atttributes that have no equivalent in SAGA specification ?
There are several alternatives for doing that:
  • Default JDL attributes can be added in a file, by adding path to this file as the value of attribute "DefaultJdlFile" in etc/jsaga-default-contexts.xml configuration file.
  • Default JDL attributes can be put directly into the etc/jsaga-default-contexts.xml configuration file (see example).
  • In addition to default JDL requirements, user-defined requirements can be added at run-time by setting the non-standard attribute "JDLRequirements" in your job description. Example usage : 
    description.setVectorAttribute("Extension", new String[]{"JDLRequirements=(other.GlueHostOperatingSystemRelease>=5.0)"});

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What is the URL syntax understood by this plug-in ?
The URL must be: 
wms://<HOSTNAME>[:<PORT>]/glite_wms_wmproxy_server        
Where:
    <HOSTNAME> is the name of the host running the WMS server,
    <PORT> is 7443 by default.

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How to get the name of the CE chosen by the WMS ?
As soon as the job is in 'READY' state, the name of the destination CE is available using 
job.getVectorAttribute(Job.EXECUTIONHOSTS)[0]

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How to get the name of the worker node where the job is running ?
As soon as the job is in 'RUNNING' state, the name of the WN may be accessible with 
job.getVectorAttribute(Job.EXECUTIONHOSTS)[1]
But on some cases, the WN is not available so the array returned by 
job.getVectorAttribute(Job.EXECUTIONHOSTS)
will only contain one element: the CE

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