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• Objective: you want a job chain to execute exclusively one order at a time.
  Subsequent orders should wait until their predecessor(s) have proceeded to the end of the job chain.
• You could

...

• specify the attribute max_orders=1 for your job chain:
  • Additional orders will wait before the first job node of a job chain.
  • Such orders will start immediately after their predecessor passed the job chain.
  • The sequence of orders that have been added to the job chain will be respected.

 <?xml version="1.0" encoding="ISO-8859-1"?>
 
 <job_chain max_orders="1">
    <job_chain_node state="100"
                    job="jobsSample_1"
                    next_state="200"
                    error_state="error"/>
    <job_chain_node state="200"
                    job="jobsSample_2"
                    next_state="success"/>
    <job_chain_node state="success"/>
    <job_chain_node state="error"/>
 </job_chain>