Java Server socket stuck on accept call (Android Client, Java Server) -

below have put fragment of code understand problem. have server code, works fine first time client loads , sends packet. after first packet received, server stuck on "accept".

i have wireshark configured port, , server getting packets. wonder why accept wont return more once. driving me nuts.

server code

 public class dapool implements runnable {  private serversocket serversocket;  private arraylist<da> pool;  private linkedlist<socket> clientconnq;  public dapool(int newpoolsize, int serverport) {   try {    serversocket = new serversocket(serverport, 500, inetaddress.getbyname("127.0.0.1"));   } catch (ioexception e) {    e.printstacktrace();    return;   }   poolsize = newpoolsize;   clientconnq = new linkedlist<socket>();   pool = new arraylist<da>(poolsize);                 da devicethread;   (int threads = 0; threads < poolsize; threads++) {    devicethread = new da();    connpool.add(devicethread);    devicethread.start();   }  }  public void run() {   while (true) {    socket incomingsocket;    try {     incomingsocket = serversocket.accept();    } catch (ioexception e) {     e.printstacktrace();     return;    }    insertnewconntoq(incomingsocket);   }  }    private class da extends thread {   private socket clientsocket;   private objectinputstream inputobjectstream;   public da() {    }   public void run() {    while (true) {      while (clientconnq.isempty()) {      synchronized (clientconnq) {       try {        clientconnq.wait();       } catch (interruptedexception ignored) {        ignored.printstacktrace();       }      }     }     synchronized (clientconnq) {      clientsocket = (socket) clientconnq.removefirst();      try {       inputobjectstream = new objectinputstream(clientsocket.getinputstream());      } catch (ioexception e) {       e.printstacktrace();       return;      }         // useful here                                          }     }    }   }  } 

client code

public class sendqueue extends thread {  linkedlist<message> requestq;  message sendrequest, requestmessage;   socket clientsocket;  outputstream outputstream;  objectoutputstream objectoutputstream;   public sendqueue(socket newclientsocket) {   requestq = new linkedlist<message>();   clientsocket = newclientsocket;  }   public void run() {   while (true) {    synchronized (requestq) {     while (requestq.isempty()) {      try {       requestq.wait();      } catch (interruptedexception ignored) {       ignored.printstacktrace();      }     }     sendrequest = requestq.removefirst();    }    try {     outputstream = clientsocket.getoutputstream();     objectoutputstream = new objectoutputstream(outputstream);         objectoutputstream.writeobject(sendrequest);     objectoutputstream.flush();     outputstream.flush();    } catch (ioexception e) {     e.printstacktrace();    } catch (runtimeexception e) {     e.printstacktrace();    }   }  }   public int sendrequest(message message) {   synchronized (requestq) {    requestq.addlast(message);    requestq.notify();   }   return 0;  } } 

i don't see timeout being set on serversocket.

serversocket.accept() blocking operation block until either error occurs, timeout occurs, or connection accepted.

try

serersocket.setsotimeout(10000) 

you don't seem closing streams when finished.