[svn] 3768: Fix BLZ-262: null pointer exception on redeploy of web app/ servlet.

Revision: 3768
Author: [email protected]
Date: 2008-10-21 07:48:14 -0700 (Tue, 21 Oct 2008)
Log Message:
Fix BLZ-262: null pointer exception on redeploy of web app/servlet.
I was too agressive in releasing the ThreadLocal variables when the servlet shut down.
Leave the nulling out code there, but add a createThreadLocalObjects() API that is called
on MessageBrokerServlet startup that will re-allocate these static variables if they are null.
QA: Yes
Doc: No
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-262
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/FlexContext.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/MessageBroker.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/MessageBrokerServlet.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/io/SerializationContext.java
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/io/TypeMarshallingContext.jav a

Similar Messages

[svn] 3779: Continue fix for BLZ-262: null pointer exception on redeploy of web app/servlet.

Revision: 3779
Author: [email protected]
Date: 2008-10-21 10:23:55 -0700 (Tue, 21 Oct 2008)
Log Message:
Continue fix for BLZ-262: null pointer exception on redeploy of web app/servlet.
Remove finally block in servlet init() as the call to destroy() in the catch block will clear ThreadLocals
if there is an error. Move it to the end of try block instead since the init() thread doesn't need any
thread locals set.
Log the startup error before calling destroy() in init() catch clause.
QA: Yes
Doc: No
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-262
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/MessageBrokerServlet.java

Hello!
I had a similar problem under WebLogic 6.1 SP4 after deploying a war-file with
a bug.
After deploying the corrected file, it seemed that the old version was deployed
again.
Perhaps this behaviour will help you to load the new application/ejb:
- undeploy
- remove from targets
- move to targets
- deploy
Claudia
"Marco" <[email protected]> wrote:
>
hi all,
i have found a werid problem in deploying applications in Solaris 8
for weblogic
7.0.
i have deployed one EJB, and the first time i access it (thru teh web
app embedded
in the .ear) it gave me a null pointer exception because i was failing
to lookup
one environment variable.
so, i fix the code, rebuild the ear and redeployed, and the same error
happened
again.
i am sure i did not do any mistakees because i have put some system.err
statements
in the bean code to show the workflow, and when i have deployed it on
Window 2k
the statemens appeared.
but in solaris they didnot appear, and i got the same exception that
i had before..
it looks like wls is caching teh ejb, because whenever i redeploy it
(adding more
and more system.err statements) it always execute the faulty code of
when deployed
the very first time.
anyone can help?
regards
marco

[svn] 3766: Fix for BLZ-261: Null pointer exception in Websphere login code .

Revision: 3766
Author: [email protected]
Date: 2008-10-21 05:59:49 -0700 (Tue, 21 Oct 2008)
Log Message:
Fix for BLZ-261: Null pointer exception in Websphere login code.
Protect the debug logging from being called if the principal variable is null.
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-261
Modified Paths:
blazeds/trunk/modules/opt/src/websphere/flex/messaging/security/WebSphereLoginCommand.jav a

Revision: 3766
Author: [email protected]
Date: 2008-10-21 05:59:49 -0700 (Tue, 21 Oct 2008)
Log Message:
Fix for BLZ-261: Null pointer exception in Websphere login code.
Protect the debug logging from being called if the principal variable is null.
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-261
Modified Paths:
blazeds/trunk/modules/opt/src/websphere/flex/messaging/security/WebSphereLoginCommand.jav a

Xi 3.1 SP3 giving java null pointer exception error on scheduling webi

after we have the system uptime running for a few days and have schedule webi jobs successfully for a few days, we constant get the message java null pointer exception error on scheduling webi.
This only have days after restarting the environment.
Seems to be coming up after scheduling a certain amount of webi reports.
Only doing a stop all services and restart resolves the issue.
XI 3.1 SP3
SAP IK Sp3
Tomcat55
HPUX-IA64 (Hpunix) platform.

Hello, I have the same issue. If someone gives you an answer please let me know how to fix it.

Null pointer exception in jserv.log

Genius,
I am facing weired exception "Null pointer exception" in jserv.log.
Apps Login is showing "internal server error"
I tried enabled debug log level in jserv.conf, httpd.conf, all logs are having Null pointer exception message. not able to trace exactly what is the issue.
This is 11.5.10 env.
Can anybody help me out?
Thanks

fyi. i am the apps dba of that env.
Yes bounced many times, after making several setups. found that ATG RUP patch 4 screwed got applied, developers applied the patches directly, which screwed the env.
now we are recloning the test env.
thanks folks for your support.

Null Pointer exception returned when object is not null!

I've isolated the problem and cut down the code to the minimum. Why do I get a null pointer exception when the start method is called, when the object objJTextField is not null at this point???? I'm really stuck here, HELP!
(two small java files, save as BasePage.java and ExtendedPage.java and then run ExtendedPage)
first file
~~~~~~~
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public abstract class BasePage extends JFrame implements ActionListener
private JPanel objJPanel = null;
public BasePage()
setSize(300,200);
Container objContentPane = getContentPane();
objJPanel = new JPanel();
createObjects();
createPage();
// Add panels to content pane
objContentPane.add(objJPanel);
public void addComponentToPage(JComponent objJComponent)
objJPanel.add(objJComponent);
public void addButtonToPage(JButton objJButton)
objJButton.addActionListener(this);
objJPanel.add(objJButton);
public void actionPerformed(ActionEvent objActionEvent)
System.out.println("Action performed");
userDefinedButtonClicked(objActionEvent.getActionCommand());
// overide
public abstract void createObjects();
public abstract void createPage();
public abstract void userDefinedButtonClicked(String sActionCommand);
file 2
~~~~
import javax.swing.*;
public class ExtendedPage extends BasePage
private JTextField objJTextField = null;
private JButton objJButtonBrowse = null;
public ExtendedPage()
super();
public void createObjects()
objJTextField = new JTextField(20);
objJButtonBrowse = new JButton("Start");
objJButtonBrowse.setActionCommand("START");
public void createPage()
addComponentToPage(objJTextField);
addButtonToPage(objJButtonBrowse);
public void userDefinedButtonClicked(String sActionCommand)
if ((sActionCommand != null) && (sActionCommand.equals("START")) )
start();
private void start()
objJTextField.setText("Doesn't work");
public static void main(String[] args)
ExtendedPage objEP = new ExtendedPage();
objEP.show();

Hello ppaulf,
Your problem is in your ExtendedPage.java file. You can fix this by changing the line
private JTextField objJTextField = null;to:
private JTextField objJTextField = new JTextField();This creates a proper instance.
Good luck,
Ming
Developer Technical Support
http://www.sun.com/developers/support

JAX-WS Client throws NULL Pointer Exception in NW 7.1 SP3 and higher

All,
My JAX-WS client is throwing an exception when attempting to create a client to connect to the calculation service. The exception is coming out of the core JAX-WS classes that are part of NetWeaver. (see exception below)
Caused by: java.lang.NullPointerException
 at com.sap.engine.services.webservices.espbase.client.jaxws.core.SAPServiceDelegate.createDispatchContextExistingPort(SAPServiceDelegate.java:440)
 at com.sap.engine.services.webservices.espbase.client.jaxws.core.SAPServiceDelegate.createDispatchContext(SAPServiceDelegate.java:475)
 at com.sap.engine.services.webservices.espbase.client.jaxws.core.SAPServiceDelegate.createDispatch(SAPServiceDelegate.java:492)
 at com.sap.engine.services.webservices.espbase.client.jaxws.core.SAPServiceDelegate.createDispatch(SAPServiceDelegate.java:484)
 at javax.xml.ws.Service.createDispatch(Service.java:166)
I have done some research and it appears that as of NetWeaver 7.1 SP3 SAP stopped using the SUN JAX-WS runtime and implemented their own SAP JAX-WS runtime. I also took the time to decompile the jar file that contained the SAPServiceDelegate class which is throwing the null pointer exception. (see method from SAPServiceDelegate below)
 private ClientConfigurationContext createDispatchContextExistingPort(QName portName, JAXBContext jaxbContext)
 BindingData bindingData;
 InterfaceMapping interfaceMap;
 InterfaceData interfaceData;
 bindingData = clientServiceCtx.getServiceData().getBindingData(portName);
 if(bindingData == null)
 throw new WebServiceException((new StringBuilder()).append("Binding data '").append(portName.toString()).append("' is missing!").toString());
 QName bindingQName = new QName(bindingData.getBindingNamespace(), bindingData.getBindingName());
 interfaceMap = getInterfaceMapping(bindingQName, clientServiceCtx);
 interfaceData = getInterfaceData(interfaceMap.getPortType());
 ClientConfigurationContext result = DynamicServiceImpl.createClientConfiguration(bindingData, interfaceData, interfaceMap, null, jaxbContext, getClass().getClassLoader(), clientServiceCtx, new SOAPTransportBinding(), false, 1);
 return result;
 WebserviceClientException x;
 x;
 throw new WebServiceException(x);
The exception is being throw on the line where the interfaceMap.getPortType() is being passed into the getInterfaceData method. I checked the getInterfaceMapping method which returns the interfaceMap (line above the line throwing the exception). This method returns NULL if an interface cannot be found. (see getInterfaceMapping method below)
 public static InterfaceMapping getInterfaceMapping(QName bindingQName, ClientServiceContext context)
 InterfaceMapping interfaces[] = context.getMappingRules().getInterface();
 for(int i = 0; i < interfaces.length; i++)
 if(bindingQName.equals(interfaces.getBindingQName()))
 return interfaces;
 return null;
What appears to be happening is that the getInterfaceMapping method returns NULL then the next line in the createDispatchContextExistingPort method attempts to call the getPortType() method on a NULL and throws the Null Pointer Exception.
I have included the code we use to create a client below. It works fine on all the platforms we support with the exception of NetWeaver 7.1 SP3 and higher (I already checked SP5 as well)
 //Create URL for service WSDL
 URL serviceURL = new URL(null, wsEndpointWSDL);
 //create service qname
 QName serviceQName = new QName(targetNamespace, "WSService");
 //create port qname
 QName portQName = new QName(targetNamespace, "WSPortName");
 //create service
 Service service = Service.create(serviceURL, serviceQName);
 //create dispatch on port
 serviceDispatch = service.createDispatch(portQName, Source.class, Service.Mode.PAYLOAD);
What do I need to change in order to create a JAX-WS dispatch client on top of the SAP JAX-WS runtime?

Hi Guys,
I am getting the same error. Any resolution or updates on this.
Were you able to fix this error.
Thanks,
Yomesh

Null pointer exception while inserting a new row in ADF with jdev

Hi,
In ADF, I have retrieved some user information from LDAP server and I want to insert those values in to my table. But when I do this, I am getting a null pointer exception when I get the view object (ViewObject vo=getCRUIP002_1();). I am not sure why this happens.
Here is my code. It is urgent.
and please some one help me in fixing the issue.
ViewObject vo=getCRUIP002_1();
vo.clearCache();
vo.setMaxFetchSize(0);
vo.executeQuery();
Row newRow=vo.createRow();
vo.insertRow(newRow);
SearchResult res = (SearchResult)results.next();
Attributes attrs = res.getAttributes();
// Row newRow = vo.getCurrentRow();
newRow.setAttribute("LOGINNAME",(Object)attrs.get("sn").get().toString());
newRow.setAttribute("PASSWORDVALUE","x");
newRow.setAttribute("FIRSTNAME",(Object)attrs.get("sn").get().toString());
newRow.setAttribute("LASTNAME",(Object)attrs.get("sn").get().toString());
newRow.setAttribute("EMAIL",(Object)attrs.get("mail").get().toString());
Thanks,
Priya.S

assuming ur jdev version is 10.1.2
ViewObject vo=getCRUIP002_1();i dont think ur getting the view object hence null pointer expception.
ViewObject vo = findViewObject("MyView1");
if u r in the object class then first get the root application module and then access the View obejct from there.
In ADF if u assign a null value, u will always get the null pointer exception coz of java. Run the app in debug mode and check the values step by step, by the way there is not exception handling in ur code either, Do u know how to debug in Jdev ?
zaibi.

I can't figure out why I'm getting a Null Pointer Exception

I'm writing a program that calls Bingo numbers. I got that part of the program to work but when I started adding Swing I kept getting a Null Pointer Exception and I don't know how to fix it. The Exception happens on line 15 of class Panel (g = image.getGraphics();). Here is the code for my classes. I'm still not finished with the program and I can't finish it until I know that this issue is resolved.
package Graphics;
import java.awt.Graphics;
import javax.swing.JFrame;
public class DrawFrame extends JFrame{
 public Panel panel;
 public DrawFrame(int x, int y, String s) {
 super(s);
 this.setBounds(0, 0, x, y);
 this.setResizable(false);
 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 this.setPreferredSize(getSize());
 panel = this.getPanel();
 this.getContentPane().add(panel);
 panel.init();
 this.setVisible(true);
 public Graphics getGraphicsEnvironment(){
 return panel.getGraphicsEnvironment();
 Panel getPanel(){
 return new Panel();
package Graphics;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
public class Panel extends JPanel{
 Graphics g;
 Image image;
 public void init() {
 image = this.createImage(this.getWidth(), this.getHeight());
 g = image.getGraphics();
 g.setColor(Color.white);
 g.fillRect(0, 0, this.getWidth(), this.getHeight());
 Graphics getGraphicsEnvironment() {
 return g;
 public void paint(Graphics graph) {
 if (graph == null)
 return;
 if (image == null) {
 return;
 graph.drawImage(image, 0, 0, this);
package Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
public class Keys extends KeyAdapter{
public int keyPressed; //creates a variable keyPressed that stores an integer
public void keyPressed(KeyEvent e) { //creates a KeyEvent from a KeyListner
 keyPressed = e.getKeyCode(); //gets the key from the keyboard
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import Graphics.*;
public class Bingo {
 static Ball balls[][] = new Ball[5][15]; //creates a 2D 5 by 15 array
 public static void main(String[] args) {
 DrawFrame frame = new DrawFrame(1500, 500, "Welcome to the automated Bingo Caller."); //creates instance of DrawFrame that is 1000 pixels wide and 500 pixels high
 Graphics g = frame.getGraphicsEnvironment(); //calls the getGraphicsEnvironment method in the DrawFrame class
 Keys key = new Keys(); //creates instance of the Key class
 frame.addKeyListener(key); //adds a KeyListener called Key
 for (int x = 0; x < 5; x++) { //fills rows
 for (int y = 0; y < 15; y++) { //fills columns
 balls[x][y] = new Ball(x, y+1); //fills array
 frame.pack(); //adjusts the size of the frame so everything fits
 g.setColor(Color.black); //sets the font color to black
 g.setFont(new Font("MonoSpace", Font.PLAIN, 20)); //creates new font
 for(int y=0;y<balls.length;y++){ //draws all possible balls
 g.drawString(balls[y][0].s, 0, y*100); //draws numbers
 for(int x=0;x<balls[y].length;x++){ //draws all possible balls
 g.drawString(balls[y][x].toString(), (x+1)*100, y*100); //draws letters
 do {
 frame.repaint(); //repaints the balls when one is called
 int x, y; //sets variables x and y as integers
 boolean exit; //sets a boolean to the exit variable
 do {
 exit = false; //exit is set to false
 x = (int)(Math.random() * 5); //picks a random number between 0 and 4 and stores it as x
 y = (int)(Math.random() * 15); //picks a random number between 0 and 14 stores it as y
 if (!balls[x][y].called) { //checks to see if a value is called
 exit = true; //changes exit to true if it wasn't called
 balls[x][y].called = true; //sets called in the Ball class to true if it wasn't called
 System.out.println(balls[x][y]); //prints value
 } while (!exit); //if exit is false, returns to top of loop
 int count = 0; //sets a count for the number of balls called
 for(int z=0;z<balls.length;z++){ //looks at balls
 g.setColor(Color.black); //displays in black
 g.drawString(balls[z][0].s, 0, z*100); //draws balls as a string
 for(int a=0;a<balls[z].length;a++){ //looks at all balls
 if (balls[z][a].called){ //if a ball is called
 g.setColor(Color.red); //change color to red
 count++; //increments count
 } else {
 g.setColor(Color.black); //if it isn't called stay black
 g.drawString(balls[z][a].toString(), (a+1)*100, y*100); //draws balls as string
 do {
 if (key.keyPressed == KeyEvent.VK_R||count==5*15) { //if R is pressed or count = 5*15
 count=5*15; //changes count to 5*15
 for(int z=0;z<balls.length;z++){ //recreates rows
 g.setColor(Color.black); //sets color to black
 g.drawString(balls[z][0].s, 0, z*100); //redraws rows
 for(int a=0;a<balls[z].length;a++){ //recreates columns
 balls[z][a] = new Ball(z, a+1); //fills array
 g.drawString(balls[z][a].toString(), (a+1)*100, z*100); //redraws columns
 } while (key.keyPressed!=KeyEvent.VK_ENTER || count == 5 * 15); //determines if the key was pressed or counter is 5*15s
 } while (key.keyPressed == KeyEvent.VK_ENTER);
public class Ball {
 String s; //initiates s that can store data type String
 int i; //initiates i that can store data as type integer
 boolean called = false; //initiates called as a boolean value and sets it to false
 public Ball(int x, int y) {
 i = (x * 15) + y; //stores number as i to be passed to be printed
 switch (x) { //based on x value chooses letter
 case 0:
 s = "B";
 break;
 case 1:
 s = "I";
 break;
 case 2:
 s = "N";
 break;
 case 3:
 s = "G";
 break;
 case 4:
 s = "O";
 public String toString() { //overrides toString method, converts answer to String
 return s + " " + i; //returns to class bingo s and i
}

The javadoc of createImage() states that "The return value may be null if the component is not displayable."
Not sure, but it may be that you need to call init() after this.setVisible(true).

Max Beans in Cache causes NULL Pointer Exception

Hi All,
a rather weird event (from our perspective) occurs when we do the
following:
We have an entity bean set to max beans in cache 100 (default value of
our deployment tool ), the database table related to that bean holds
lets say 300 entries.
Doing a find all and in the same session bean instanciated transaction a
processing loop over the enumeration of beans we get an NULL Pointer
exception when accesing the 101 Bean. Neverthless the Weblogic server
increases the cache size automatically but obviously not fast enough and
not on time.
has anyone experienced the same problem and has a fix for it, appart
from increasing the cache size in the deployment descriptor ?
any help welcome
Michael

Hi Michael.
Can you post the stack trace of the NullPointerException? Was it in
your code or ours? Also, what version of WebLogic are you using?
-- Rob
Rob Woollen
Software Engineer
BEA WebLogic
[email protected]
Michael Rupprecht wrote:
Hi All,
a rather weird event (from our perspective) occurs when we do the
following:
We have an entity bean set to max beans in cache 100 (default value of
our deployment tool ), the database table related to that bean holds
lets say 300 entries.
Doing a find all and in the same session bean instanciated transaction a
processing loop over the enumeration of beans we get an NULL Pointer
exception when accesing the 101 Bean. Neverthless the Weblogic server
increases the cache size automatically but obviously not fast enough and
not on time.
has anyone experienced the same problem and has a fix for it, appart
from increasing the cache size in the deployment descriptor ?
any help welcome
Michael

Java Null Pointer Exception - with arraycopy method.

Hi all,
I have been trying to fix this for a while now, but I think I've been staring at the screen for too long to fix it!
Basically I am trying to 'crossover' some arrays (evolutionary technique) but I keep getting a null pointer exception.
Here is my customised class: class ChromosomeDetails {
     double[] chromosomePrices;
     int[] chromosomePoints;
     int[] chromosomePlayerIDs;
     int chromosomeFitness;
     ChromosomeDetails(double[] chromosomePrices, int[] chromosomePoints, int[] chromosomePlayerIDs, int chromosomeFitness) {
          this.chromosomePrices = chromosomePrices;
          this.chromosomePoints = chromosomePoints;
          this.chromosomePlayerIDs = chromosomePlayerIDs;
          this.chromosomeFitness = chromosomeFitness;
     public ChromosomeDetails () {
          chromosomePrices = null;
          chromosomePoints = null;
          chromosomePlayerIDs = null;
          chromosomeFitness = 0;
     public double[] getPrices() {
          return chromosomePrices;
     public int[] getPoints() {
          return chromosomePoints;
     public int[] getPlayerIDs() {
          return chromosomePlayerIDs;
     public int getFitness() {
          return chromosomeFitness;
} In my main method I create 2 instances of this class like so:ChromosomeDetails parentChromosomeADetails = new ChromosomeDetails();
ChromosomeDetails parentChromosomeBDetails = new ChromosomeDetails();...and 2 other instances that are left empty:ChromosomeDetails childChromosomeCDetails = new ChromosomeDetails();
ChromosomeDetails childChromosomeDDetails = new ChromosomeDetails();     I then try to 'crossover' the values in the arrays like so: int randomCrossoverPoint = new Random().nextInt(parentChromosomeADetails.chromosomePoints.length-1);
System.arraycopy(parentChromosomeADetails.chromosomePrices, 0, childChromosomeCDetails.chromosomePrices, 0, randomCrossoverPoint);
System.arraycopy(parentChromosomeBDetails.chromosomePrices, randomCrossoverPoint, childChromosomeCDetails.chromosomePrices, randomCrossoverPoint, (childChromosomeCDetails.chromosomePrices.length-randomCrossoverPoint));
System.arraycopy(parentChromosomeADetails.chromosomePoints, 0, childChromosomeCDetails.chromosomePoints, 0, randomCrossoverPoint);
System.arraycopy(parentChromosomeBDetails.chromosomePoints, randomCrossoverPoint, childChromosomeCDetails.chromosomePoints, randomCrossoverPoint, (childChromosomeCDetails.chromosomePoints.length-randomCrossoverPoint));
System.arraycopy(parentChromosomeADetails.chromosomePlayerIDs, 0, childChromosomeCDetails.chromosomePlayerIDs, 0, randomCrossoverPoint);
System.arraycopy(parentChromosomeBDetails.chromosomePlayerIDs, randomCrossoverPoint, childChromosomeCDetails.chromosomePlayerIDs, randomCrossoverPoint, (childChromosomeCDetails.chromosomePlayerIDs.length-randomCrossoverPoint));
                    However it gives me this error, relating to the first arraycopy method: Exception in thread "main" java.lang.NullPointerException
     at java.lang.System.arraycopy(Native Method)Please note that in this program, parentChromosomeADetails and parentChromosomeBDetails already hold data when I try to use the arraycopy method, whereas the childChromosomeCDetails and childChromosomeDDetails objects are empty, waiting for the data from the arraycopy methods. Any help would be immensely appreciated.

it was learning very well yesterday, but that was before I introduced my customised class. I need my class as I need to be able to keep hold of all of the data, rather than just the chromosome points, so that I can see the exact strategy that the algorithm uses.
It is indeed the child chromosome that is null, and I suppose that it because I had to initialise the int[] chromosomePoints, double[] chromosomePrices and int[] chromosomePlayerIDs as null. What is the best solution to this? using loops to initialise all values in the arrays as 0 before the arraycopy?!

Null pointer Exception with Custom EventQueue

I created a simple class customEventQueue which is extended from EventQueue class and pushed it using
Toolkit.getDefaultToolkit().getSystemEventQueue().push(customEventQueue);
Now, whenever there are three modal dialogs on top of a frame and if I click on top dialog that closes all three dialog boxes, I get nullpointer exception in console. The custom event class does not have any method in it. It just extends from EventQueue.
I checked it in different JRE and it happens only in JRE1.3.1.
Has anybody tried the same thing with custom event queue? Any help is most welcome. Thanks...
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)

Hi Chandel me having the same problem
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown
Source)
at
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Sour
ce)
at
java.awt.DefaultKeyboardFocusManager.pumpApprovedKeyEvents(Unknown So
urce)
at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Sour
ce)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown
Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.SequencedEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown
Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Th bigger problem is that i don't know what is causing this exception, cause the stack trace doesn't mention the line of code where the exception occurred.
In earlier version of java we had pData null pointer exception. This bug manifests when the pull down menu doesn't fit completely into the frame's bounds and swing has to create a seaprate window for the pull-down.
The problem is that WInputMethod caches a reference to peer and that that reference becomes stale when peer is destroyed and recreated.
In this bug cached peer reference becomes stale as the Window for the menu is hidden (and its peer is destroyed) and shown again (with new peer this time).
WInputMethod have a cached reference to the old peer but that old peer is not connected to the underlying native window used to display the menu.
But it's been fixed. I want to know if our problem is in some way related to this pData bug.
Thanx.

Oracle 10g JDev IDE 9.0.5.2 Null Pointer Exception while debugging

Hi,
In windows XP m/c, I am facing following Null Pointer
Exception while debugging basic Java application through
10g JDev 9.0.5.2, and it failed in debugging that application...
May I know, How to get it out of this problem..., am
suspecting Is it related to any of my windows XP configuration?
Here's the stack trace shown in the 10g JDev console while
debugging simple java application..,
java.lang.NullPointerException
at javax.swing.border.EmptyBorder.<init>(EmptyBorder.java:54)
at com.sun.java.swing.plaf.windows.WindowsTableHeaderUI$XPDefaultRendere
r.getTableCellRendererComponent(WindowsTableHeaderUI.java:63)
at oracle.jdevimpl.runner.debug.ThreadsPanel$3.getTableCellRendererCompo
nent(ThreadsPanel.java:306)
at javax.swing.plaf.basic.BasicTableHeaderUI.getHeaderRenderer(BasicTabl
eHeaderUI.java:394)
at javax.swing.plaf.basic.BasicTableHeaderUI.getHeaderHeight(BasicTableH
eaderUI.java:428)
at javax.swing.plaf.basic.BasicTableHeaderUI.createHeaderSize(BasicTable
HeaderUI.java:454)
at javax.swing.plaf.basic.BasicTableHeaderUI.getPreferredSize(BasicTable
HeaderUI.java:485)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1275)
at oracle.jdevimpl.runner.debug.ThreadsPanel.threadsPanelSettingsChanged
(ThreadsPanel.java:538)
at oracle.jdevimpl.runner.debug.ThreadsWindow$AllThreadsPanel.threadsWin
dowSettingsChanged(ThreadsWindow.java:408)
at oracle.jdevimpl.runner.debug.ThreadsWindow.threadsWindowSettingsChang
ed(ThreadsWindow.java:138)
at oracle.jdevimpl.runner.debug.ThreadsWindow.<init>(ThreadsWindow.java:
112)
at oracle.jdevimpl.runner.debug.JDebugger.getThreadsWindow(JDebugger.jav
a:3048)
at oracle.jdevimpl.runner.debug.DebuggingProcess.selected(DebuggingProce
ss.java:565)
at oracle.ideimpl.runner.RunManager.viewSelectionChanged(RunManager.java
:467)
at oracle.ide.addin.AbstractView.fireViewSelectionChanged(AbstractView.j
ava:484)
at oracle.ideri.navigator.DefaultNavigatorWindow.fireViewSelectionChange
d(DefaultNavigatorWindow.java:791)
at oracle.ideri.navigator.DefaultNavigatorWindow$3.viewSelectionChanged(
DefaultNavigatorWindow.java:1218)
at oracle.ide.addin.AbstractView.fireViewSelectionChanged(AbstractView.j
ava:484)
at oracle.ideimpl.explorer.BaseTreeExplorer.actionPerformed(BaseTreeExpl
orer.java:2077)
at javax.swing.Timer.fireActionPerformed(Timer.java:271)
at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh

John,
You mentioned "I closed the IDE so that the TopLink project would pick up the changes..."
1. We need to find out why you needed to close the IDE? Was TopLink mapping editor not picking up your changes?
2. I am sure you did not modified .java outside of Jdev, but in case if you did, let me know.
3. After removing a superclass attribute, did you save all changes?
4. We tried various combinations, but were unable to reproduce the project reopen issue that you mentioned was fixed by changing the ClassDescriptor.xml. It would be extremely helpful if you could either send us (anuj dot k dot jain at oracle dot com) a project that can reproduce this issue, or outline the exact steps.

XI Business scenario Null pointer exception

Hi SDN,
I am on NW2004s, with PI_Basis sp10, I am getting a Java.lang null pointer
exception.
Please guide me Step by step process on which service pack I have to be and what all patches of java should I apply / upgrade to fix this problem.
Thanks in Advance,
Regards,
Sai.k.k

Hi Konchada,
Is this PI System newly installed?
Let me know!
Moreover have you imported XI BASIS Component?
If it is newly installed, this problem is because you have not imported XI BASIS Component. You import the component through Integration Repository Environment.
I think this will solve your issue
Regards,
Ramesh P
Message was edited by:
Ramesh P

Really frustrating Null Pointer Exception

Hi I had the day off and was bored so I decided to start work on a poker game. Today I just started making a deck of cards and drawing a random card from it. However it isn't working as I get a very annoying null pointer exception which I don't understand. Anyway I will post my code:
public class DeckOfCards
 public static void main(String args[])
 Deck daDeck = new Deck();
 Card[] drawnCards = new Card[10];
 for (int i=0; i < 10; ++i)
 drawnCards[i] = daDeck.DrawCard();
 System.out.println(drawnCards.getTitle());
import java.util.*;
public class Deck
 Suit Hearts;
 Suit Diamonds;
 Suit Spades;
 Suit Clubs;
 public void Deck()
 Hearts = new Suit("Hearts");
 Diamonds = new Suit("Diamonds");
 Spades = new Suit("Spades");
 Clubs = new Suit("Clubs");
 public Card DrawCard()
 System.out.println("Drawing card...");
 Random generator = new Random();
 Card card = null;
 System.out.println("Card variable inited");
 while (card == null)
 System.out.println("Bleep");
 switch (generator.nextInt(4))
 case 0:
 System.out.println("0");
 return Hearts.getAvailableCard();
 case 1:
 System.out.println("1");
 return Diamonds.getAvailableCard();
 case 2:
 System.out.println("2");
 return Spades.getAvailableCard();
 case 3:
 System.out.println("3");
 return Clubs.getAvailableCard();
 default:
 System.out.println("none");
 System.out.println("Exited while loop");
 return card;
import java.util.*;
public class Suit
 Card[] cards = new Card[13];
 public Suit(String suit_)
 cards[0] = new Card("Two", suit_);
 cards[1] = new Card("Three", suit_);
 cards[2] = new Card("Four", suit_);
 cards[3] = new Card("Five", suit_);
 cards[4] = new Card("Six", suit_);
 cards[5] = new Card("Seven", suit_);
 cards[6] = new Card("Eight", suit_);
 cards[7] = new Card("Nine", suit_);
 cards[8] = new Card("Ten", suit_);
 cards[9] = new Card("Jack", suit_);
 cards[10] = new Card("Queen", suit_);
 cards[11] = new Card("King", suit_);
 cards[12] = new Card("Ace", suit_);
 public Card getAvailableCard()
 System.out.println("Getting an available card...");
 Random generator = new Random();
 Card card = new Card();
 int randomNo = generator.nextInt(13);
 System.out.println(randomNo);
 if (cards[randomNo].isAvailable())
 return cards[randomNo];
 return card;
public class Card
 String strValue;
 String suitName;
 int value;
 int suit;
 boolean available = true;
 public Card()
 strValue = "Out";
 suitName = "cards";
 public Card(String strValue_, String suitName_)
 strValue = strValue_;
 suitName = suitName_;
 public String getTitle()
 String title = strValue + " of " + suitName;
 return title;
 public void setAvailable(boolean available_)
 available = available_;
 public boolean isAvailable()
 return available;
What the program is meant to do is create a deck of cards, then pick ten cards, randomly picking a suit and card in that suit. If the card has already been drawn ( not available ) then the DrawCard() method should repick a suit and card and try again. The program may be doing something differently to what I have said and may be a bit messy just because I have messed around with things trying to understand why I am getting the exception. This is the exception:
Exception in thread "main" java.lang.NullPointerException
at Deck.DrawCard(Deck.java:34)
at DeckOfCards.main(DeckOfCards.java:13)
The program doesn't even make it to the first line of the getAvailableCard() method in the Suit Class.
So all I am asking is can anyone see why I am getting the null pointer exception and what action could I take to fix it. Thankyou to anyone who has read this.

Figure out what's null.
Print out cards and then cards[randomNo].
If those aren't null, then you need to look more closely at the erorr message and put in print statements to find out what is.
Whatever turns out to be null, you'll need to trace back and figure out why.
If it's the array, and the array is a member variable, then you need to know that reference member variables are initilaized to null.
If the array isn't null (because you did cards = new Card[something]) but cards[randomNo] is null, then it's because you didn't do this: for (int ix = 0; ix < cards.length; ix++) {
 cards[ix] = new Card(...);
}

[svn] 3768: Fix BLZ-262: null pointer exception on redeploy of web app/ servlet.

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