code: public int getMaxJobsPerUserToInitialize(String queue) {
      int maxJobsPerUser = rmConf.getInt(toFullPropertyName(queue,
          "maximum-initialized-jobs-per-user"), 
          defaultMaxJobsPerUsersToInitialize);
      if(maxJobsPerUser <= 0) {
        throw new IllegalArgumentException(
            "Invalid maximum jobs per user configuration " + maxJobsPerUser);
      }
      return maxJobsPerUser;
    }
docs: Gets the maximum number of jobs which are allowed to initialize in the
  job queue.
  
  @param queue queue name.
  @return maximum number of jobs allowed to be initialized per user.
  @throws IllegalArgumentException if maximum number of users is negative
  or zero.