protected void stopJobAcquisitionThread(){
  if (asyncJobAcquisitionThread != null) {
    try {
      asyncJobAcquisitionThread.join();
    }
 catch (    InterruptedException e) {
      log.warn("Interrupted while waiting for the async job acquisition thread to terminate",e);
    }
    asyncJobAcquisitionThread=null;
  }
}

protected void stopJobAcquisitionThread ( ) { if ( asyncJobAcquisitionThread != null ) { try { asyncJobAcquisitionThread . join ( ) ; } catch ( InterruptedException e ) { log . warn ( "Interrupted while waiting for the async job acquisition thread to terminate" , e ) ; } asyncJobAcquisitionThread = null ; } }
stops the acquisition thread
