protected void startExecutorPool(){
  if (m_executorPool != null) {
    m_executorPool.shutdownNow();
  }
  m_executorPool=Executors.newFixedThreadPool(m_executionSlots);
}

protected void startExecutorPool ( ) { if ( m_executorPool != null ) { m_executorPool . shutdownNow ( ) ; } m_executorPool = Executors . newFixedThreadPool ( m_executionSlots ) ; }
start the pool of execution threads
