code: private void release(PooledConnection<C> pooledConnection) {
  		long currentTime = System.currentTimeMillis();
  		long useTime;
  		synchronized(pooledConnection) {
  			pooledConnection.releaseTime = currentTime;
  			useTime = currentTime - pooledConnection.startTime;
  			if(useTime>0) pooledConnection.totalTime.addAndGet(useTime);
  			pooledConnection.allocateStackTrace = null;
  		}
  		// Remove from the pool
  		synchronized(poolLock) {
  			try {
  				if(busyConnections.remove(pooledConnection)) availableConnections.add(pooledConnection);
  			} finally {
  				poolLock.notify();
  			}
  		}
  	}
docs: Releases a PooledConnection.  It is safe to release
  it multiple times.  The connection should have either
  been closed or reset before this is called because
  this makes the connection available for the next request.