Hi,
We encounter two problems using avirata:

1. large log file of avirata
-rwx------+ 1 Administrators None 1046609834  jackrabbit.log_IS_UNDEFINED

When the avirata workflow runs, the above file is generated and can grow too 
large, i think this should be turned off as it will occupy unnecessary disk 
space.

2. we get runtime exception and a popup shows up:

org.apache.airavata.xbaya.XBayaException: Empty Output Generated
    at 
org.apache.airavata.xbaya.util.InterpreterUtil.findInputFromPort(InterpreterUtil.java:213)
    at 
org.apache.airavata.xbaya.interpretor.WorkflowInterpreter.handleWSComponent(WorkflowInterpreter.java:979)
    at 
org.apache.airavata.xbaya.interpretor.WorkflowInterpreter.executeDynamically(WorkflowInterpreter.java:719)
    at 
org.apache.airavata.xbaya.interpretor.WorkflowInterpreter.scheduleDynamically(WorkflowInterpreter.java:357)
    at 
org.apache.airavata.xbaya.graph.dynamic.gui.DynamicWorkflowRunnerWindow$3.run(DynamicWorkflowRunnerWindow.java:389)

what will be the reason for this?

thanks

Ning

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