OracleDBConsole problem
I'm having problems opening Enterprise Manager and starting OracleDBConsole service.
i've tried the following:
1) emctl status dbconsole
output: oc4j configuration issue:C:\oracle\.../oc4j/j2ee/oc4j_dbconsole_bcc_test_bcc not found
(bcc_test:localhost & bcc:instance)
2) emca -config dbcontrol db -repos create
output: repository successfully created
warning: error executing cmd c:\oracle...\bin\emctl.bat deploy dbconsole
+ severe: error instantiating EM configuration files+
3) emctl start agent
output: unable to determine localhost from url repository_url=http://bcc_test:%em_upload_port%/em/upload/
Any help pls?
would highly appreciate it.
Hi,
Did you setup your environment.. ??
do this..
emca.bat -config dbcontrol db
This asks you the appropriate questions and sets up the EM environment.
Check you etc/hosts (%WINDOWS%\system32\drivers\etc\hosts file.) is having the your ip
and try for starting dbconsole.. (try after restarting your system).. it will work... !!
- Pavan Kumar N
Edited by: Pavan Kumar on Oct 7, 2008 6:59 PM
Similar Messages
-
OEM 10g Oracledbconsole problems in a Windows XP Pro environment
I just figured why the new Oracle 10g OEM for windows(Windows XP Pro in my case) will not start up and the OracleDBConsole process fails with a return code of 2( Agent process exited abnormally during initialization).
I had my internet service connected last week through my cable company. Before that I could start up the Oracle 10g OEM without any problems but afterwards I started getting the OracleDBConsole error. After a little research and after re-installing Oracle several times I discovered the problem:
When you boot up your machine Oracle or perhaps oracledbconsole executes a Java applicaton called
getHostIPAddress, which gets the ip address of your machine. Another Java application is executed aftewards called getHostNameForIPAddress that attempts to derive the host name using the ip address returned from the getHostIPAddress function.
When I installed Oracle 10g with my internet connection active the getHostIPAddress function was returning the ip address assigned to me dynamically by my cable company. Function getHostNameForIPAddress was than called to get the hostname using this ip address and that's where the problem occurred. These are the errors as they appear in the installationactions... file in my
C:\Program Files\Oracle\Inventory\logs folder:
Calling Query netQueries10.1.0.2.0 getHostNameForIPAddress
ipAddress = 24.51.224.63
Query Exception: UnknownHostException
Query Exception Class: class oracle.sysman.oii.oiil.OiilQueryException
It appears that the getHostNameForIPAddress
cannot and probably should not be able to derive the hostname using a dynamically assigned ip address.
Solution:
1. I removed Oracle 10g from my machine and all references to it(registry). You might not have to do this
but I wanted no problems with the re-installation.
2. I turned off the cable modem.
3. I re-installed Oracle 10g and rebooted. This time the Oracle 10g OEM worked. The oracledbconsole and the emagent services were started successfully.
The ip address host was resolved to the localhost(127.0.0.0) not to the ipaddress assigned to me by my ISP because the internet connection was not active.
Note. You must leave your cable box disconnected or turned off until the oracledbconsole and the emagent services are started else you will start having the same problems. Everytime you startup your machine oracledbconsole or some other process executes the getHostIPAddress and getHostNameForIPAddress functions. That's why you have to wait until those two processes( oracledbconsole and the emagent ) are running before you can turn on your cable modem. Look in the processes tab of the windows task manager to verify that these two processes are running.Hi gene731;
WARNING I just received word from the IBM CERT Team that the security for Microsoft Live has been breached. Their recommendation is to have nothing to do with it until Microsoft is able to redo the security. At the present time the hackers are able to defeat the Microsoft Live security one third of the time.
You may want to let your mom know how much danger she is letting herself in for using Microsoft Live since the security has been breached.
Allan -
Problems installing 10G (r 10.2) on Windows 7 64-bit
Hello. I am taking an introductory Oracle SQL class. The professor gave us a link to install Oracle 10g release 2, which I followed and performed on my Windows 7 64-bit laptop. The installation seemed to run through okay. When asked (again, per instruction), I created a database named CIS276 (the class name) instead of "orcl" as suggested during the setup. I am having problems getting connected to the database, however, and since the class is online, I can't go to our campus to sit down with the professor to work out where the trouble is, so I'm hoping somebody out here can help me. Here's where I am:
I am able to get to the Enterprise Manager through the loopback address and port that was given to me during installation. I am able to log into EM using the SYS account with the password I entered during install. I get to a screen that has a button labelled "Startup/Shutdown." When I click that button, I am taken to a screen asking for Host credentials (OS account name and password) and database credentials (I use "SYS", the password I created, database is already filled in, and "SYSDBA" for "Connect as"). After entering this information, I click on OK. I get an error message at the top of the screen saying: "Couldnot contact the agent. Verify that the url for the agent is null." I looked up this string and a suggestion was to run " lsnrctl status"--I think (I've been trying a lot of things over the past couple of days to try to get this running) and the program replied that the environment variable "ORACLE_SID" wasn't set. I looked up what I was supposed to do and went into Windows 7 Environment area and set the value.
I rebooted the computer and tried again and am still getting the same problem. So I Googled the error message again and saw a suggestion to stop and restart dbconsole. When I did that, I got an error (stopping and starting) telling me that I was denied access.
At this point, I felt I'd better stop and get any suggestions from more experienced Oracle users. If anybody could give me some suggestions as to what to try next, I'd truly appreciate it.
And one other question: when I followed the link to download Oracle, there was another download listed called something like "Companion Disk 2". Is this a necessary download or is it just extra stuff that I may not use for now?
Thank you again.
Eric S. BaumanHi Eric,
I thin your problem is not related to Operating System. Right now I also use Windows 7 64 bit. and the oracle database that i used is Oracle 10g (10.2.0.3) for windows vista 64 bit. still up and running good.
"I am able to get to the Enterprise Manager through the loopback address and port that was given to me during installation. I am able to log into EM using the SYS account with the password I entered during install. I get to a screen that has a button labelled "Startup/Shutdown." When I click that button, I am taken to a screen asking for Host credentials (OS account name and password) and database credentials (I use "SYS", the password I created, database is already filled in, and "SYSDBA" for "Connect as"). After entering this information, I click on OK. I get an error message at the top of the screen saying: "Couldnot contact the agent. Verify that the url for the agent is null." I looked up this string and a suggestion was to run " lsnrctl status"--I think (I've been trying a lot of things over the past couple of days to try to get this running) and the program replied that the environment variable "ORACLE_SID" wasn't set. I looked up what I was supposed to do and went into Windows 7 Environment area and set the value."
from your problem let's do it one by one:
to run lsnrctl, from windows desktop--> click start menu -> on search program and files box type cmd, the start menu will change its appearance and it will show you black icon with names cmd.exe do right click on that icon then choose run as administrator. It will open DOS command prompt for you.
on DOS prompt type : set ORACLE_SID=<your database name>, example : set ORACLE_SID=orcl then enter
now you can execute your lsnrctl status from the prompt.
in case you need to start listener you can use : lsnrctl start from previous DOS Prompt or you can start it via services.msc as follow : from windows desktop--> click start menu -> on search program and files box type services.msc then enter on window that open find oracle<oracle_home>TNS listener services then double click this services click on button start.
as for the agent problem is not running try to check the services with names oracleDBConsole<dbname> is it run or not.
hope it helps. -
OracleDBConsole service does not start
I am running Oracle 10.2.0 on windows xp. For some reason, my OracleDBConsole no longer starts up. I look in the Event Viewer and it just says the process exited during initialization.
I try running nmesrvc.exe on the command prompt and get a StartServiceCtrlDispatcher 1063 error.
I try typing 'net start OracleDBconsoleorcl' and I get a service specific error of 2.
Any clues on what is going on? It has started in the past, but now does work, and I have changed nothing about the oracle installation.If you are running on a DHCP based environment, you will see Enterprise manager console works when it is attached to the network who provided your ip address. Otherwise a configuration file named localhost.localdomain will be found. When installing on dynamic IP systems it is highly advisable to configure a Loopback adapter. Check this out: http://download-west.oracle.com/docs/cd/B19306_01/install.102/b14316/reqs.htm#BABGCEAI
Otherwise, components like Enterprise Manager will suddenly stop to work.
In case you have already performed this tasks and problems still persists, then a console reconfiguration will have to take place, after you ensure proper consistency with IP addressing mechanism.
~ Madrid -
Oracle 10g on Windows 2003 Perl.exe problem
I am using Windows 2003 server and have installed Oracle 10g SEONE. There is a service of OracleDBConsole which starts multiple perl.exe process in background. This results in full utilisation of Hard drive and memory. The task manager shows 100% utilization and over 3GB of Memory including Virtual memory utilization. My server is having 1GB RAM.
Please help me to reduce server resource consumption....We've got the same problem. Installed 10g on a new Dell server running Win 2003 Server.
We see 2 Perl.exe processes that each take 50% of the cpu, appear to be in a loop, and consume huge amounts of memory until the server pretty much locks-up.
I've seen this symptom several times on this forum and others, yet no one ever seems to come up with a resolution. Should I dump Oracle and use MySQL? -
Where's the problem??VMWARE workstation + win2003 + DB 10G (EM not working)
Please I need a real help in this , I have Installed Win 2003 Server On VMware Workstation with DB 10 G but the Enterprise Manager Give me Blank Homepage (no Login Interface) , Is this problem happend in Physical installation of Win 2003 sever ?? Is there is any options to be Enabled to let the EM work on Win 2003 server or it's work normally as win XP ,Vista ???
Help!!!!!!!!!!!!!!!!!!!!!!Hi,
Assuming Windows OracleDBConsole(sid) service is up and running on your virtual machine, issue you are facing could be a browser setting. You should add https://hostname into trusted sites in Internet Explorer or have something similar done with Mozilla Firefox (if that is your prefered browser). After that you'll get a login screen.
Hope this helps. -
OracleDBConsole service cannot start
Hi all,
I installed Oracle 11g software on a Windows XP SP2 machine with 1 GB RAM.
I then used DBCA to create a db and in the end of the db creation the following error raised:
error screenshot: http://www.ahmedbaraka.com/temp/error.jpg
logfile URL: http://www.ahmedbaraka.com/temp/emConfig.log
After many attempts to use emca to create the EM repository, I noticed the problem is in starting the OracleDBConsole service. This service cannot be started by Windows. When I refer to the Even Log, I see the following error: "Process exited abnormally during initialization."
<b>Did any one face this problem when installing Oracle 11g? Is there any suggestiong to try to fix it?</b>
Thanks in advance.Hi all,
I installed Oracle 11g software on a Windows XP SP2
machine with 1 GB RAM.
I then used DBCA to create a db and in the end of the
db creation the following error raised:Sorry I have not checked your screen shots. My question is did you install 11g with the standard database and then created a new DB (second DB) with DBCA or you installed Software Only?
One thing to check is whether you have got 2 listeners. The first listener would be created successfully, but the second will fail because Oracle will try to allocate the same port it gave to the first listener to the second listener. -
Hello again!!!
I'm trying to install the RAC in my two servers with Windows 2000 Advanced Server.
The problem is that after installing Oracle CFS, Oracle 9i EE, patch 9.0.4 for Oracle, and patch for dbca and srvm for RAC; I've configured a cluster listener, and when I reboot both of the nodes the OracleGSDService service only starts in one of the nodes, so I can't launch DBCA to configure a cluster database.
The error message appears me when I try to start this service is:
"Error 1053:The service did not respond to the start or control request in a timely fashion."
And when I try to execute gsd.bat appears a java exception saying something like "Port already in use:2006 ...."
Any idea?¿ Thanks in advance. Bye,
SilviaHi!
I have the same problem, unfortunatelly. Could anybady help me?
Environment: Windows XP, Oracle 10g.
Services -> OracleDBconsole[SID] -> start -> "Error 1053: The service did not respond to the start or control request in a timely fashion"
Install, Database-creating was succesfully...
OracleDBconsole[SID] started may time... But today I can't start... :o(
I tried to call emca.bat reconfigure repository. I can't re-configure. "Repository already exists, fix the error(s) and run EM configurant assistant in standalone mode. Could not complete the configuration. Refer the log file for details." -
I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
LeftyThis was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
boolean active = true;
public void run(){
ss.setSoTimeout(90);
while (active){
try{
serverSocket = ss.accept();
catch (SocketTimeoutException ste){
// do nothing
// interrupt thread
public void deactivate(){
active = false;
// you gotta sleep for a time longer than the
// accept() timeout to make sure that timeout is finished.
try{
sleep(91);
}catch (InterruptedException ie){
interrupt();
} -
A problem with Threads and MMapi
I am tring to execute a class based on Game canvas.
The problem begin when I try to Play both a MIDI tone and to run an infinit Thread loop.
The MIDI tone "Stammers".
How to over come the problem?
Thanks in advance
Kobi
See Code example below:
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
public class MainScreenCanvas extends GameCanvas implements Runnable {
private MainMIDlet parent;
private boolean mTrucking = false;
Image imgBackgound = null;
int imgBackgoundX = 0, imgBackgoundY = 0;
Player player;
public MainScreenCanvas(MainMIDlet parent)
super(true);
this.parent = parent;
try
imgBackgound = Image.createImage("/images/area03_bkg0.png");
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
imgBackgoundY = this.getHeight() - imgBackgound.getHeight();
catch(Exception e)
System.out.println(e.getMessage());
* starts thread
public void start()
mTrucking = true;
Thread t = new Thread(this);
t.start();
* stops thread
public void stop()
mTrucking = false;
public void play()
try
InputStream is = getClass().getResourceAsStream("/sounds/scale.mid");
player = Manager.createPlayer(is, "audio/midi");
player.setLoopCount(-1);
player.prefetch();
player.start();
catch(Exception e)
System.out.println(e.getMessage());
public void run()
Graphics g = getGraphics();
play();
while (true)
tick();
input();
render(g);
* responsible for object movements
private void tick()
* response to key input
private void input()
int keyStates = getKeyStates();
if ((keyStates & LEFT_PRESSED) != 0)
imgBackgoundX++;
if (imgBackgoundX > 0)
imgBackgoundX = 0;
if ((keyStates & RIGHT_PRESSED) != 0)
imgBackgoundX--;
if (imgBackgoundX < this.getWidth() - imgBackgound.getWidth())
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
* Responsible for the drawing
* @param g
private void render(Graphics g)
g.drawImage(imgBackgound, imgBackgoundX, imgBackgoundY, Graphics.TOP | Graphics.LEFT);
this.flushGraphics();
}You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM -
Hi all,
I would like to ask you for a help. I need to write a small program at my university. I started to write a midlet which function would be to countdown time for sports activities. I woul like to start a new thread - the one that counts down - and at the same time make the main thread sleep. After the "countdown" thread finishes, the main thread wakes up and waits for user input. The problem is that when the "countdown" thread finishes his work, I've got Uncaught exception java/lang/NullPointerException. error and the midlet halts.
Below you can find the code
import java.lang.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class intervals extends MIDlet implements CommandListener
public Display ekran;
private SweepCanvas sweeper;
private Form rundy;
private TextField round0, round1, round2, round3, round4, round5, round6, round7, round8;
private long czas,x;
private Command exitCommand;
private Command addRound;
private Command delRound;
private Command start;
private TextField repeat;
private Form odliczanie;
private Alert ostrz;
Licznik thread;
String test;
StringItem test1;
int parz,i,j,k;
static int l;
int ilrund;
int ilpowt;
Item sec;
long sec1;
public intervals()
rundy = new Form("Interwały sportowe");
exitCommand = new Command("Wyjście", Command.EXIT, 2);
addRound = new Command("Dodaj","Dodaj rundę", Command.ITEM,1);
delRound = new Command("Usuń","Usuń ostatnią rundę", Command.ITEM,1);
start = new Command("Start", Command.ITEM,1);
odliczanie = new Form("Odliczanie");
TextField dodaj(TextField kolej)
kolej=new TextField("Podaj czas (s) rundy "+parz,null, 4, TextField.NUMERIC);//stworzenie nowej instancji do wybierania czasu trwania rundy
if(rundy.size()==0)
rundy.insert(rundy.size(),kolej);
else
rundy.insert(rundy.size()-1, kolej);
return kolej;
void odliczanie(TextField round)
monitor m=new monitor();
k=Integer.parseInt(round.getString());
ekran.setCurrent(odliczanie);
thread=new Licznik(k,odliczanie);
thread.start();
ekran.setCurrent(rundy);
public void startApp()// throws MIDletStateChangeException
rundy.deleteAll();
repeat = new TextField("Podaj ilość powtórzeń",null,1,TextField.NUMERIC);
rundy.addCommand(addRound);
rundy.addCommand(exitCommand);
rundy.setCommandListener(this);
Canvas obrazek = new MyCanvas();
ekran = Display.getDisplay(this);
ekran.setCurrent(obrazek);
czas=System.currentTimeMillis();
while (System.currentTimeMillis()<czas+1000)
continue;
ekran.setCurrent(rundy);
public void pauseApp()
public void destroyApp(boolean unconditional)
notifyDestroyed();
public void commandAction(Command c, Displayable s)
if (c == exitCommand)
destroyApp(false);
notifyDestroyed();
else if(c==addRound)
if(rundy.size()==0)//Sprawdzenie ilości elementów w celu poprawnego wyświetlania liczby rund w formie
parz=1;
else
parz=rundy.size();
switch(parz)
case 1:
round0=dodaj(round0);break;
case 2:
round1=dodaj(round1);break;
case 3:
round2= dodaj(round2);break;
case 4:
round3=dodaj(round3);break;
case 5:
round4=dodaj(round4);break;
default:
ostrz=new Alert("Uwaga","Maksymalna liczba rund wynosi 9", null, AlertType.INFO);
ostrz.setTimeout(3000);
ekran.setCurrent(ostrz);
if(rundy.size()==1)
rundy.append(repeat);
rundy.addCommand(start);
rundy.addCommand(delRound);
else if(c==delRound)
if(rundy.size()!=0)
rundy.delete(rundy.size()-2);
if (rundy.size()==1)
rundy.deleteAll();
if(rundy.size()==0)
rundy.removeCommand(delRound);
rundy.removeCommand(start);
else if(c==start)
ilrund=rundy.size()-1;
if(this.repeat.size()>0)
ilpowt=Integer.parseInt(this.repeat.getString());
ekran = Display.getDisplay(this);
for (i=1; i<=ilpowt;i++)
odliczanie= new Form("Odliczanie");
for (j=0;j<ilrund;j++)
switch(j)
case 0:
odliczanie(round0);
break;
case 1:
odliczanie(round1);
break;
case 2:
odliczanie(round2);
break;
case 3:
odliczanie(round3);
break;
case 4:
odliczanie(round4);
break;
case 5:
odliczanie(round5);
break;
case 6:
odliczanie(round6);
break;
case 7:
odliczanie(round7);
break;
case 8:
odliczanie(round8);
break;
class Licznik extends Thread
int czas1,k;
Form forma;
monitor m;
public Licznik(int k,Form formap)
czas1=k;
forma=formap;
public synchronized void run()
while(czas1>0)
forma.deleteAll();
forma.append("Czas pozostały (s): "+czas1);
try{Thread.sleep(1000);} catch(InterruptedException e){e.printStackTrace();}
czas1--;
if(czas1<=0)
m.put();
}and monitor class
public class monitor
boolean busy=false;
synchronized void get()
if(!busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
notify();
synchronized void put()
if(busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
busy=true;
notify();
}Can anybody help me with this?Groovemaker,
Your Licznik class has a member m of type monitor, which has not been instantiated (in other words is null) hence, when calling m.put() you get NullPointerException. Please also mind, that using Thread.sleep(1000) is not an accurate way of measuring time.
If I may, please use recommended for Java class naming conventions - some of your names use lower case, while other don't which is confusing to the reader.
Daniel -
Problem with threads within applet
Hello,
I got an applet, inside this applet I have a singleton, inside this singleton I have a thread.
this thread is running in endless loop.
he is doing something and go to sleep on and on.
the problem is,
when I refresh my IE6 browser I see more than 1 thread.
for debug matter, I did the following things:
inside the thread, sysout every time he goes to sleep.
sysout in the singleton constructor.
sysout in the singleton destructor.
the output goes like this:
when refresh the page, the singleton constructor loading but not every refresh, sometimes I see the constructor output and sometimes I dont.
The thread inside the singleton is giving me the same output, sometime I see more than one thread at a time and sometimes I dont.
The destructor never works (no output there).
I don't understand what is going on.
someone can please shed some light?
thanks.
btw. I am working with JRE 1.1
this is very old and big applet and I can't convert it to something new.Ooops. sorry!
I did.
public void start() {
public void stop() {
public void destroy() {
try {
resetAll();
Configuration.closeConnection();
QuoteItem.closeConnection();
} finally {
try {
super.finalize();
} catch (Throwable e) {
e.printStackTrace();
} -
Problem with Threads and a static variable
I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
protected static void Init(){
objMainProcess = new Thread() {
public void run() {
while( objMainProcess == Thread.currentThread() ) {
GetState();
objMainProcess.setDaemon( true );
objMainProcess.start();
public static void initStatusTimer(){
if(objTimer == null)
objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
public void actionPerformed( java.awt.event.ActionEvent evt){
SetState();
private static void SetState(){
if( objMainProcess == null ) return;
synchronized( objMainProcess ) {
bChanged = true;
try{
objMainProcess.notify();
}catch( IllegalMonitorStateException e ) {}
private static boolean GetState() {
if( objMainProcess == null ) return false;
synchronized( objMainProcess ) {
if( bChanged) {
SendMessage();
bChanged = false;
return true;
try {
objMainProcess.wait();
}catch( InterruptedException e ) {}
return false;
}Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D. -
Problem with threads running javaw
Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue; // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer) // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
// System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
}catch(Exception a){
JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run -
Problem with Threads and "plase wait..."-Window
Hi everyone,
I have a problem that I'm not able to solve in any way... I have a time-consuming task (a file decryption) which I execute in a separate thread; I've used the SwingWorker class, like suggested by sun-tutorial, and it works right. The problem is that I have to wait that the decryption have finished before continuing with program-execution. Therefore I would like to display a "please wait"-window while the task runs. I've tryed all the possible ways I know but the problem is always the same: the waitWindow is displayed empty, the bounds are painted but the contents no; it's only painted when the decrypt-task has finished. Please help me, I have no more resources....
decrypt-file code:
public class DecryptFile {
private String cryptedFileNameAndPath;
private ByteArrayInputStream resultStream = null;
// need for progress
private int lengthOfTask;
private int current = -1;
private String statMessage;
public DecryptFile(String encZipFileNameAndPath) {
cryptedFileNameAndPath = encZipFileNameAndPath;
//Compute length of task...
// 0 for indeterminate
lengthOfTask = 0;
public ByteArrayInputStream getDecryptedInputStream() {
return this.resultStream;
* Called from ProgressBarDemo to start the task.
public void go() {
current = -1;
final SwingWorker worker = new SwingWorker() {
public Object construct() {
return new ActualTask();
worker.start();
* Called from ProgressBarDemo to find out how much work needs
* to be done.
public int getLengthOfTask() {
return lengthOfTask;
* Called from ProgressBarDemo to find out how much has been done.
public int getCurrent() {
return current;
public void stop() {
current = lengthOfTask;
* Called from ProgressBarDemo to find out if the task has completed.
public boolean done() {
if (current >= lengthOfTask)
return true;
else
return false;
public String getMessage() {
return statMessage;
* The actual long running task. This runs in a SwingWorker thread.
class ActualTask {
ActualTask () {
current = -1;
statMessage = "";
resultStream = AIUtil.getInputStreamFromEncZip(cryptedFileNameAndPath); //here the decryption happens
current = 0;
statMessage = "";
}The code that calls decryption and displays waitWindow
final WaitSplash wS = new WaitSplash("Please wait...");
final DecryptFile cryptedTemplate = new DecryptFile (this.templateFile);
cryptedTemplate.go();
while (! cryptedTemplate.done()) {
try {
wait();
} catch (Exception e) { }
this.templateInputStream = cryptedTemplate.getDecryptedInputStream();
wS.close();Thanks, thanks, thanks in advance!
EdoardoMaybe you can try setting the priority of the long-running thread to be lower? so that the UI will be more responsive...
Maybe you are looking for
-
see question above Im having problems updating my iphone 4S updating software that fixes bugs! please contact me at 443-201-6604.
-
Pictures imported from iPhoto 6 to iPhoto 09 lost organization
I recently upgraded from a Quicksilver 2002 (iPhoto 06) to a Mac Mini 2009 (iPhoto 09). I copied the iPhoto Library (folder) from the G4 to the Mac Mini and ran iPhoto 09. It imports (automatically the photos, few thousands) but the organization is a
-
Hello From what I have read, reading dates from a table connected via dbconnect is not easy. OSS recommends that you create a view in the source system with a character mask on the date fields as Oracle stores dates in a unique way. In my situation I
-
I have used iphoto and created photo books but now I want to create a hardcover book with mainly stories with a few photos. Iphoto provides very little space in its text boxes for text and I understand that ibook author will produce and ebook but wi
-
How can I change colour or design to the folder icons in Mail ?
How can I change colour or design to the folder icons in Mail ?