Problems with my WDS
Hi guys. I set up a wds last week (my extreme is the "head" and the express is the addon). I added the express to give my self a larger range. Unfortunately, I often get the same results as I did with just one station (one bar). I'm trying to find out why. The only reason I have come up with is that I'm not on the right base station. If I look in internet connect it shows me my basestation id. When I compare this id to that of the two base stations I find that I am connected to the main base station. I'll be damned if the extreme is giving better reception than my express. Any ideas on what to do? I'm gonna try resetting the express again. I feel like I waste $100 right now. Just to add, I placed my computer RIGHT NEXT to the base station (the express) and got 2 bars.
Whats going on guys?
thanks,
axel
Powerbook G4 Mac OS X (10.4.8) airport extreme card
This is interesting to. I opened up the extreme station (the main one) in airport admin and clicked on wds. It listed the express but called it unavailable. What could be wrong with my express? On another note, I cannot even log into the express in airport admin. I've tried the two passwords that are possible. I was able to log into it once on admin, and not again since then. It says "an error occurred while reading the configuration".
Any ideas would be greatly appreciated.
Similar Messages
-
Problems with getting WDS network to work - TimeCapsule + AirportExtreme
Hi There, Apologies if this has been answered somewhere else but I have searched and still havent managed to solve my problem.
I have a TC plugged into our cable modem which is broadcasting wirelessly fine. What I am trying to do is extend the network by using a Airport Extreme BaseStation in another room which has a PC computer plugged into the Airport Extreme via ethernet cable that (the PC doesn't have wireless capability).
so this is what I am trying to do:
Internet - (ethernet) - TimeCapsule - (wifi) - Airport Extreme - (ethernet) - PC
The Time Capsule is running version 7.4.2 software
The Airport Extreme is running version 5.7
What I have tried so far is to set the TC to "Participate in a WDS network" on channel 1 using WPA/WPA2 Personal passwords. In the WDS settings it is set to WDS main and I have allowed the Airport ID of the AE.
In the settings on the AEI have the wireless network name set to the same as the TC, I have the radio mode on 802.11g only (i have tried the others too but didn't seem to work). The wireless mode is set to Participate in WDS network, channel set to 1 and under WDS settings I have it set as WDS relay and the ID of the TC in WDS main settings.
The TC when i look at its set up occasionaly flashes up WDS error, all it says is The device is set up as WDS network but no other Apple Wireless devices were found.
Im really scratching my head on this one, Im not an expert on networks at all but normally configuring apple stuff has caused a lot less headaches that this.
Can anyone tell me if I am doing anything obviously wrong or any suggestions as to what I can do to get this working. (I personally blame the PC for not having wireless!!!)
Cheers
DWelcome to the discussion area!
WDS can be tricky. Instead of setting up the second device as a relay, you might try setting it up as a remote. Normally, a relay is used between a base and a remote. Take a look at the excellent instructions previously posted by expert Tesserax as follows:
http://discussions.apple.com/thread.jspa?threadID=2355832&tstart=0
And you could also refer to Apple's instructions on pages 42-44 in the Designing AirPort Networks Guide -
Problems setting up WDS with AE
I recently had some problems with my home network and performed a hard reset on both of my AE base stations in order to reconfigure the network. I am trying to set up a WDS network with the two AE's (one being connected to the internet and the other serving as a remote to extend the range and use AirTunes function). When using Airport Utility and going through the setup process, I set up the primary AE with the connection to the internet. I am then using Airport Utility to try and configure the second AE to join the main network, but AU is not allowing the remote AE to connect/join the primary network. I keep getting an error message saying that the Apple wireless device could not join the WDS network and that I should close Airport Utility and try again. I have tried this a number of times, as well as performing more hard resets of both AE's and nothing seems to be working - any suggestions??
This is the first time I have ever had this problem using AU. In past versions of the program this has always worked setting up the network automatically, but does not seem to be working this time. Any suggestions would be helpful.
Thanks,
JBYou would get better responses if you posted in the airport section of the forum.
http://discussions.apple.com/category.jspa?categoryID=140 -
Problem setting up WDS with MSI RG54GS2 & Motorola WR850g
Problem setting up WDS with WR850g & MSI RG54GS2
Hi,
I'm trying to bridge 2 routers: Motorola WR850g & MSI RG54GS2 .
I set the MSI as the main router (it works better for me as a router than the Moto), and the Moto is the repeater. I have set it up exactly as the guide on Broadbandreports.com for the Motorola , and on Tom's Networking http://www.tomsnetworking.com/2004/04/14/how_to_wds_bridge/
The Moto sees the MAC of the MSI (Status is UP), the MSI doesn't have a page that shows WDS MACs . I know the routers are connected because when I connect a laptop to the Moto wireless network, it gets an IP (and the DHCP on the Moto is disabled) and the default gateway of the connection is the IP of the main (MSI) router.
The problem is I can't surf anywhere. I can't even ping the MSI router - which should be possible if the WDS works properly.The Moto Wireless Bridge Operation is set properly to Access Point/Wireless Bridge .
Can anyone solve this?
Thanks.David, welcome to the discussions.
Are you refering to Airport Extreme Setup as the Extreme base.
Or are you using a 3rd party Router as your primary Base, or the Express as the primary base.
Read the supplied link, Not all 3rd party routers are WDS compatible.
http://discussions.apple.com/thread.jspa?messageID=2785566
Who is you Internet Service Provider?
What brand and Model Modem did they furnish?
Are you using Dial-Up...DSL...or Cable?
http://docs.info.apple.com/article.html?artnum=303595
See if there is any help from this link.
http://discussions.apple.com/thread.jspa?messageID=607414
Cheers Don -
Ipad in WDS network: problems with roaming
We have a WIFI-network with several remote wifi-stations. Using an iPad, we have problems when moving within the network to pick up the stronger signal from a close-by station. Instead, the iPad keeps the previous station till it gets so week it drops the connection.
It looks, we had a problem with 3.0, then it seemed to become much better in iOS 3.2, now with 3.3. it got bad again.
Any experience or better idea how to get a reliable connection when moving within the wifi-network-area?you did not say what router you are using. i am asuming you have 2 apple airport base stations, one named lab1 and the other is lab2.
if you want your ipad to steer to the nearest base station you need to run an ethernet cable between lab1 and lab2 on lab1 you set airport utility to "allow this network to be extended" and on lab2 yoiu run airport utillity and set it to "join an existing network", there should be a setting there"connect with ethernet".. once this is properly setup, the ipad should automatically steer to the access point that has the strongest signal
also on lab2, you want to set it to ""allow wireless clients". if that is not checked, then the ipad cannot join it.
if you are not using apple airport extremes or apple airport expresses in your network, then your probably posting on the wrong forum. and you would need to go to that manufactures website to see how to setup their wireless routers to wds. -
Airport Extreme Utility problem with Vista (works with XP, MacOS)
Hi,
I just setup a new Airport Extreme network at my house, and most things are working fine. I have wirelessly connected at various points an Airport Express (using WDS), a MacBook Pro (OSX) and an IBM Thinkpad. I have several wired machines as well.
My problem: The wired machine I use to configure and setup everything is a Vista Ultimate machine. Unfortunately, the Airport Utility won't connect to the Airport Extreme (or Airport Express for that matter) from Vista. The utility works fine from XP or OSX, but not from Vista. Note that I'm using this in a wired capacity. The Vista machine is directly connected to the Airport Extreme, while several other machine are connected through a GBit switch.
Any help would be much appreciated? Is this a Vista security problem or an Airport Utility problem with Vista?It's most likely a security issue with Windows Vista. Vista has the ability to set "compatibility modes" for applications.
Try:
1. right mouse clicking the Airport Utility's .exe file.
2. Click the Compatibility tab. Change the Compatibility mode to Windows XP (Service Pack 2).
3. Now go down to "Privilage Level" and check the "Run this program as an administrator"
Apple never tells you this but you must connect to the Airport Extreme wirelessly. Now run the Airport Utility. You should see it. -
IP / DHCP Problems with D-Link Extreme
I have been having a lot of problems with my current set up.. D-Link router/modem -> Airport Extreme >WDS> Express. The D-Link router has the "DHCP Range" of Start: 192.168.1.2 End: 192.168.254 and Lease time of 24 hours. The Airport extreme has the IP Address of 169.254.255.1 and Connection Sharing set to Off (Bridge Mode). The Airport Extreme keeps telling me it does not have a valid IP address and my MBP is connected to the AEBS is saying Airport has a self-assigned IP address and may not be able to connect to the internet. I have no idea of what settings to change it to. Help please.
Most likely there is a bad connection between the D-Link router and the Base Station, accounting for the inability of the Base Station to communicate with the D-Link router and thus obtaining an IP address.
Does the status light on the D-Link router port to which the Airport Base Station is cabled show a valid and active connection? If not, try a different ethernet cable for connecting the two devices and/or try plugging the Base Station into a different port on the D-Link router. -
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();
} -
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 camera.
Hi everybody!
I've a problem with taking snapshot.
I would like to display a loading screen after it take snapshot ( sometimes i
have to wait few seconds after i took snapshot. Propably photo is being taken in time where i have to wait).
I was trying to use threads but i didn't succeed.
I made this code:
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while((!performing.isShown()) && (backgroundCamera.isShown())){
Thread.yield();
notifyAll();
}).start();
new Thread(new Runnable(){
public void run() {
try {
this.wait();
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start();This code is sometimes showing performing screen but sometimes no.
I don't know why. In my opinion performing.isShown() method isn't working correctly.
Does anyone have some idea how to use threads here?Hi,
I've finally managed to work this fine.
The code:
Object o = new Object();
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while(!performing.isShown()){
Thread.yield();
synchronized(o) {
o.notify();
}).start();
new Thread(new Runnable(){
public void run() {
try {
synchronized(o) {
o.wait(1);
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start(); -
We have a problem where our application stops responding after a few days of usage. Things will for fine for a day or two, and then pretty quickly threads will start getting hung up, usually in places where they are allocating memory
We are running WebLogic 8.1 SP2 on Sun JDK 1.4.2_04 on Solaris 8 using the alternate threading model and the -server hotspot vm. We are running pretty much the same code that we had no problems with under WebLogic 6.1 SP4 and Sun JDK 1.3.1.
A thread dump usually shows that some or all of our execute threads are in the state "waiting for monitor entry" even though they are not currently waiting on any java locks. Here is a sample thread from the thread dump (we have ~120 threads so I don't want to post the full dump).
=============================================================================================
"ExecuteThread: '8' for queue: 'itgCrmWarExecutionQueue'" daemon prio=5 tid=0x005941d0 nid=0x2c waiting for monitor entry [c807f000..c807fc28]
at java.lang.String.substring(String.java:1446)
at java.lang.String.substring(String.java:1411)
at weblogic.servlet.internal.ServletRequestImpl.getRelativeUri(ServletRequestImpl.java:1872)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3492)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
=============================================================================================
String.java line 1446 for this jdk allocates a new String object, and all the other threads in this state also are creating new objects or arrays, etc.
We've done a pstack on this process when it's in this state, and the threads that are in the "waiting for monitor entry" that look like they're allocating memory are all waiting on the same lwp_mutex_lock with some allocation method that's calling into the native TwoGenerationCollectorPolicy.mem_allocate_work (see pstack output below for the same thread as in the thread dump above)
=============================================================================================
----------------- lwp# 44 / thread# 44 --------------------
ff31f364 lwp_mutex_lock (e3d70)
fee92384 __1cNObjectMonitorGenter26MpnGThread__v_ (5000, 525c, 5000, 50dc, 4800, 4af0) + 2d8
fee324d4 __1cSObjectSynchronizerKfast_enter6FnGHandle_pnJBasicLock_pnGThread__v_ (c807f65c, c807f7d4, 5941d0, 0, 35d654, fee328ec) + 68
fee32954 __1cQinstanceRefKlassZacquire_pending_list_lock6FpnJBasicLock__v_ (c807f7d4, ff170000, d4680000, 4491d4, fee1bc2c,
0) + 78
fee3167c __1cPVM_GC_OperationNdoit_prologue6M_i_ (c807f7bc, 4400, ff170000, 2d2b8, 4a6268, c807fa18) + 38
fee2e0b0 __1cIVMThreadHexecute6FpnMVM_Operation__v_ (c807f7bc, 963a8, 0, 0, 1, 0) + 90
fed2c2a4 __1cbCTwoGenerationCollectorPolicyRmem_allocate_work6MIii_pnIHeapWord__ (962c0, ff1c29ec, ff1c297c, ff131a26, 4800, 4998) + 160
fed22940 __1cNinstanceKlassRallocate_instance6MpnGThread__pnPinstanceOopDesc__ (ee009020, 5941d0, 15ca581, 3647f0, 4a6268, c807f8c8) + 180
fed34928 __1cLOptoRuntimeFnew_C6FpnMklassOopDesc_pnKJavaThread__v_ (ee009018, 5941d0, 0, 0, 0, 0) + 28
fa435a58 ???????? (ee009018, e86de, 15ca4de, 50dc, 5941d0, c807f9c8)
fb36f9a4 ???????? (0, d412ccd8, ee046c28, ff170000, 0, 0)
fad8b278 ???????? (ee046c28, d6000c90, ee046530, 8, db8e8450, c807f9e8)
fad62abc ???????? (d412ccd8, ee046530, d6000c90, ee3bfa38, 8, c807fa18)
fa4b3c38 ???????? (c807fb9c, 0, f2134700, fa415e50, 8, c807faa8)
fa40010c ???????? (c807fc28, c807fe90, a, ee9e1e20, 4, c807fb40)
fed5d48c __1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHandle_pnRJavaCallArguments_pnGThread__v_ (c807fe88, c807fcf0, c807fda8, 5941d0, 5941d0, c807fd00) + 27c
fee4b784 __1cJJavaCallsMcall_virtual6FpnJJavaValue_nLKlassHandle_nMsymbolHandle_4pnRJavaCallArguments_pnGThread__v_ (ff170000, 594778, c807fd9c, c807fd98, c807fda8, 5941d0) + 164
fee5e8dc __1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_ (c807fe88, c807fe84, c807fe7c, c807fe74, c807fe6c, 5941d0) + 6c
fee6fc74 __1cMthread_entry6FpnKJavaThread_pnGThread__v_ (5941d0, 5941d0, 838588, 594778, 306d10, fee69254) + 128
fee6927c __1cKJavaThreadDrun6M_v_ (5941d0, 2c, 40, 0, 40, 0) + 284
fee6575c _start (5941d0, fa1a1600, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Also when it's having this problem, the "VM Thread" is always using a lot of processor time. We did a couple of pstacks today while it was having this problem, and this thread was stuck in the ONMethodSweeper.sweep for over 15 minutes when we finally killed the server.
From the thread dump:
"VM Thread" prio=5 tid=0x000e2d20 nid=0x2 runnable
From the first pstack:
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed40c04 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (42a2f4, fa5fa46d, ffffffff, fc4ffcb8, 42a2f4, 42a324) + 124
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (42a2f0, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (fa5f7f88, fa608940, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Second pstack
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed41180 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (0, ff1b9664, ffffffff, fc4ffcb8, a6f2cc, fc4ffbd0) + 6a0
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (a6f2c8, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (faded4c8, fadf2c80, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Has anyone ever seen anything like this? I'm trying to figure out if this is caused by something we're doing, or something relating to our environment and jvm options. Any ideas?Thanks for the reply - I'm testing our app with the +UseConcMarkSweepGC now in our test environment to make sure it doesn't cause any problems there. Unfortunately the only place we've had this problem is on the production server, so it's extra difficult debugging this.
We're using the following memory options:
-ms512m -mx512m -XX:NewSize=128m -XX:PermSize=192m -XX:MaxNewSize=128m -XX:MaxPermSize=192m -XX:SurvivorRatio=8and the following debugging options, as we've also been seeing OutOfMemoryErrors ( see http://forum.java.sun.com/thread.jsp?forum=37&thread=522354&tstart=45&trange=15 )
-verbosegc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGCBTW, which c++filt version and options are you using? Our Solaris boxes only seem to have the GNU version installed. I was trying to run that on some of the other stack traces and wasn't getting anywhere, and didn't know if because it was GNU version wouldn't work on something compiled with the Sun compiler.
Thanks!
--Andy -
Problem with threads and ProgressMonitor
Dear Friends:
I have a little problem with a thread and a ProgressMonitor. I have a long time process that runs in a thread (the thread is in an separate class). The thread has a ProgressMonitor that works fine and shows the tasks progress.
But I need deactivate the main class(the main class is the user interface) until the thread ends.
I use something like this:
LongTask myTask=new LongTask();
myTask.start();
myTask.join();
Now, the main class waits for the task to end, but the progress monitor don`t works fine: it shows only the dialog but not the progress bar.
What's wrong?Is the dialog a modal dialog? This can block other UI updates.
In general, you should make sure that it isn't modal, and that your workThread has a fairly low priority so that the UI can do its updating -
Problem with threads and/or memory
I'm developing an application where there are 3 threads. One of them sends a request to the other, and if the 2nd can't answer it, it sends it to the 3rd (similar to CPU -> CACHE -> MEMORY). When i run the program with 1000-10.000 requests, no problem occurs. When i run it with 300.000-1.000.000 requests, it sometimes hangs. Is this a problem with the garbage collector, or should it be related to the threads mecanism.
(note: eache thread is in execution using a finite state machine)i had been running the program inside Netbeans.
Running the jar using the command line outside
Netbeans i have no more problems... Does Netbeans use
it's own JVM?Depends how you set it up, but look under the options. There are settings for the compiler and jvm that it uses. -
Installation problem with NW'04 SR1: database connection failed
Hi all,
while installing NW '04 SR1 on Windows Server 2003 SP1 and MS SQL Server 2000 SP4 I ran into an error related to the database connection. While performing the step "Load Java Database content" SAPinst crashes with the message
com.sap.sql.log.OpenSQLException: Could not load class com.ddtek.jdbc.sqlserver.SQLServerDriver.
The connection to the SLQ Server with e.g. the Query Analyzer is OK. I had a problem with this installation setup before (have a look at the corresponding <a href="https://forums.sdn.sap.com/thread.jspa?threadID=338638&tstart=0">thread</a> ), the JDBC drivers where missing on the installation master but after copying them in the right direction the installation went on with no problem up to this point...
Has anybody an idea what could have happened here? Is this maybe a problem connected to the one I recently had
Below I attached the sapinst.log and jload.log with more detailed messages.
sapinst.log ###########
INFO 2007-03-12 22:06:24
Working directory changed to C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_~1\ONE_HOST.
INFO 2007-03-12 22:06:24
Output of D:\Java/bin/java.exe '-classpath' './sharedlib/antlr.jar;./sharedlib/exception.jar;./sharedlib/jddi.jar;./sharedlib/jload.jar;./sharedlib/logging.jar;./sharedlib/offlineconfiguration.jar;./sharedlib/opensqlsta.jar;./sharedlib/tc_sec_secstorefs.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\base.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\util.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\sqlserver.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\spy.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jce_export.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jsse.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_smime.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_ssl.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/w3c_http.jar' '-showversion' '-Xmx512m' 'com.sap.inst.jload.Jload' '-sec' 'WPT,jdbc/pool/WPT,D:\usr\sap\WPT\SYS\global/security/data/SecStore.properties,D:\usr\sap\WPT\SYS\global/security/data/SecStore.key' '-dataDir' 'S:/D51030724\J2EE_OSINDEP\J2EE-ENG/JDMP' '-job' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/IMPORT.XML' '-log' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log' is written to the logfile C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_~1\ONE_HOST/jload.java.log.
WARNING 2007-03-12 22:06:26
Execution of the command "D:\Java/bin/java.exe '-classpath' './sharedlib/antlr.jar;./sharedlib/exception.jar;./sharedlib/jddi.jar;./sharedlib/jload.jar;./sharedlib/logging.jar;./sharedlib/offlineconfiguration.jar;./sharedlib/opensqlsta.jar;./sharedlib/tc_sec_secstorefs.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\base.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\util.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\sqlserver.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\spy.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jce_export.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jsse.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_smime.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_ssl.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/w3c_http.jar' '-showversion' '-Xmx512m' 'com.sap.inst.jload.Jload' '-sec' 'WPT,jdbc/pool/WPT,D:\usr\sap\WPT\SYS\global/security/data/SecStore.properties,D:\usr\sap\WPT\SYS\global/security/data/SecStore.key' '-dataDir' 'S:/D51030724\J2EE_OSINDEP\J2EE-ENG/JDMP' '-job' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/IMPORT.XML' '-log' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log'" finished with return code 1. Output:
java version "1.4.2_13"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_13-b06)
Java HotSpot(TM) Client VM (build 1.4.2_13-b06, mixed mode)
12.03.2007 22:06:25 com.sap.inst.jload.Jload main
INFO: Jload -sec WPT,jdbc/pool/WPT,D:\usr\sap\WPT\SYS\global/security/data/SecStore.properties,D:\usr\sap\WPT\SYS\global/security/data/SecStore.key -dataDir S:/D51030724\J2EE_OSINDEP\J2EE-ENG/JDMP -job C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/IMPORT.XML -log C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log
12.03.2007 22:06:26 com.sap.inst.jload.Jload main
SCHWERWIEGEND: couldn't connect to DB
com.sap.sql.log.OpenSQLException: Could not load class com.ddtek.jdbc.sqlserver.SQLServerDriver.
ERROR 2007-03-12 22:06:26
CJS-20065 Execution of JLoad tool 'D:\Java/bin/java.exe '-classpath' './sharedlib/antlr.jar;./sharedlib/exception.jar;./sharedlib/jddi.jar;./sharedlib/jload.jar;./sharedlib/logging.jar;./sharedlib/offlineconfiguration.jar;./sharedlib/opensqlsta.jar;./sharedlib/tc_sec_secstorefs.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\base.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\util.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\sqlserver.jar;D:\usr\sap/WPT/JC10/j2ee\jdbc\spy.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jce_export.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_jsse.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_smime.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/iaik_ssl.jar;D:/usr/sap/WPT/SYS/global/security/lib/tools/w3c_http.jar' '-showversion' '-Xmx512m' 'com.sap.inst.jload.Jload' '-sec' 'WPT,jdbc/pool/WPT,D:\usr\sap\WPT\SYS\global/security/data/SecStore.properties,D:\usr\sap\WPT\SYS\global/security/data/SecStore.key' '-dataDir' 'S:/D51030724\J2EE_OSINDEP\J2EE-ENG/JDMP' '-job' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/IMPORT.XML' '-log' 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log'' aborts with returncode 1. Check 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log' and 'C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.java.log' for more information.
jload.log ###########
12.03.07 22:06 com.sap.inst.jload.Jload main
INFO: Jload -sec WPT,jdbc/pool/WPT,D:\usr\sap\WPT\SYS\global/security/data/SecStore.properties,D:\usr\sap\WPT\SYS\global/security/data/SecStore.key -dataDir S:/D51030724\J2EE_OSINDEP\J2EE-ENG/JDMP -job C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/IMPORT.XML -log C:\PROGRA1\SAPINS1\NW04SR1\WEBAS_1\ONE_HOST/jload.log
12.03.07 22:06 com.sap.inst.jload.Jload main
SEVERE: couldn't connect to DB
com.sap.sql.log.OpenSQLException: Could not load class com.ddtek.jdbc.sqlserver.SQLServerDriver.
Best regards,
BerndHello Kairat,
Please follow the below mentioned guide to install it.
Check all the parameters to set and run pre requisite checker before starting installation.
Keep in mind that before starting any SAP installation you should always run prerequisite checker.
https://websmp205.sap-ag.de/instguides --> SAP Netweaver -->SAP Netweaver 7.0 -- > Installations --> EHP2
Regards,
Amit Barnawal
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