if (log.isTraceEnabled())
if (trace)
   public void handleConnectionException(Throwable t, Client c)   {      if (log.isTraceEnabled())      {         log.trace("Caught exception from connection", t);      }      if (exceptionListener != null)      {                  if (t instanceof Error)         {            log.error("Caught error on connection", t);         }         else         {            Exception e =(Exception)t;            JMSException j = new JMSException("Throwable received from underlying connection");            j.setLinkedException(e);            synchronized (exceptionListener)            {               exceptionListener.onException(j);            }         }               }         }