question: public void shutdown ( ) throws ConnectionManagerException { s_logger . info ( "Shutting down CIM adapter." ) ; connectionLock . lock ( ) ; try { closeAllConnections ( ) ; if ( _listener != null ) { _listener . stop ( ) ; _listener = null ; } executorService . shutdown ( ) ; } catch ( Exception e ) { throw new ConnectionManagerException ( "An error occurred shutting down the connection manager" , e ) ; } finally { connectionLock . unlock ( ) ; } }
target:  Shutdown the application. Stops the listener (which releases its TCP port).