master/api/job?return=JocOrderStatistics&isDistributed=false does not work when job chain is removed

Current Situation

• How to reproduce
  • The ./live folder contains a sub-directory, e.g. ./live/js-1827, with a job chain. The contents of the job chain configuration is irrelevant to reproduce this problem.
  • The web service http://host:port/jobscheduler/master/api/job?return=JocOrderStatistics&isDistributed=false with Body: {"path":"/"}

    returns the list of jobs that are available from the ./live folder:

    /js-1827/job:
      due: 0
      notPlanned: 0
      setback: 0
      inTask: 0
      waitingForResource: 0
      suspended: 0
      total: 0
      occupiedByClusterMember: 0
      permanent: 0
      planned: 0
      inTaskProcess: 0
      blacklisted: 0
      started: 0
      fileOrder: 0
    /scheduler_file_order_sink:
      due: 0
      notPlanned: 0
      setback: 0
      inTask: 0
      waitingForResource: 0
      suspended: 0
      total: 0
      occupiedByClusterMember: 0
      permanent: 0
    h3. Desired Behavior
    
      planned: 0
      inTaskProcess: 0
      blacklisted: 0
      started: 0
      fileOrder: 0
    /scheduler_service_forwarder:
      due: 0
      notPlanned: 0
      setback: 0
      inTask: 0
      waitingForResource: 0
      suspended: 0
      total: 0
      occupiedByClusterMember: 0
      permanent: 0
      planned: 0
      inTaskProcess: 0
      blacklisted: 0
      started: 0
      fileOrder: 0
    

  • Remove the job chain from the sub-directory ./live/js-1827
• The return of the web service http://host:port/jobscheduler/master/api/job?return=JocOrderStatistics&isDistributed=false is now

  SCHEDULER-161 There is no JobChain '.'
  

• Delimitation
  • This problem occurs with job chains from sub-directories of the ./live folder, it does not occur for job chains that are located in the ./live folder.

Desired Behavior

• The web service http://host:port/jobscheduler/master/api/job?return=JocOrderStatistics&isDistributed=false should always return the list of available jobs, independent from the fact that previously an arbitrary job chain configuration file has been removed.