Netty lags for a few seconds before shutting down -

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iv been doing network programming while , converted 1 of projects netty. iv been bothered lot fact unlike original program, client freeze 3-5 seconds before closing, enough make me end force terminating everytime because don't want wait it. normal netty? doing wrong?

main method:

public static void main(string[] args) throws exception {     final sslcontext sslctx = sslcontext.newclientcontext(insecuretrustmanagerfactory.instance);      eventloopgroup group = new nioeventloopgroup();     try {         bootstrap b = new bootstrap();         b.group(group)          .channel(niosocketchannel.class)          .handler(new networkinitializer(sslctx));         // start connection attempt.          ch = b.connect(host, port).sync().channel();          //sends clients name server         askname();       //loop simple gl stuff , gameplay updating, posted below         while(running){loop();         if (display.iscloserequested()){               running = false;             if (lastwritefuture != null) {                 lastwritefuture.sync();             }    //tells server shut down             write("9");             ch.closefuture().sync();             group.shutdowngracefully();             system.out.println("herro der");             break;         }         }     } {         group.shutdowngracefully();          // connection closed automatically on shutdown.     } }

loop class:

    private static void loop() {     gl11.glclear(gl11.gl_color_buffer_bit);     //main update method game.  calculations , stuff.  can post if neccisary kinda big.     spacestate.update();     display.update();     display.sync(60); }

group.shutdowngracefully(); default waits 3 seconds until pending tasks executed before terminates itself. can specify different timeout value, small value has risk of getting rejectedexecutionexception. if sure application has no business left event loop group, can specify small value terminate immediately.


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