code: public int getMinimumUserLimitPercent(String queue) {
      int userLimit = rmConf.getInt(toFullPropertyName(queue,
          "minimum-user-limit-percent"), defaultUlimitMinimum);
      if(userLimit <= 0 || userLimit > 100) {
        throw new IllegalArgumentException("Invalid user limit : "
            + userLimit + " for queue : " + queue);
      }
      return userLimit;
    }
docs: Get the minimum limit of resources for any user submitting jobs in
  this queue, in percentage.
  
  This method defaults to default user limit configured if
  no value is specified in the configuration for this queue.
  
  Throws an {@link IllegalArgumentException} when invalid value is
  configured.
  
  @param queue name of the queue
  @return minimum limit of resources, in percentage, that will be
  available for a user.