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.

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Java Null Pointer Exception while Importing a Table to IS

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hi Keerthi,
thank you.
i tried with below code but still unsuccesfully
+ oaDFF = (OADescriptiveFlexBean)oawebbean.findIndexedChildRecursive("ActFlexField");+
oapagecontext.writeDiagnostics(this, "Niccal: i got DFF handle", 1);
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i am able to print 1° comment line but not second. so i think it's something wrong getting the segment handle.
anyway i'm not able to reach your suggested if statement because execution stops before.
Infact, if i comment line :OAMessageTextInputBean mtib = (OAMessageTextInputBean)oaDFF.findChildRecursive("ActFlexField0");
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Java Null Pointer Exception- Business Validation In AM

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Hi Sumit,
Thanks for replying. Here is the error stack.
Exception Details.
oracle.apps.fnd.framework.OAException: java.lang.NullPointerException
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     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processFormRequest(OAFormBean.java:395)
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     at oracle.apps.fnd.framework.webui.OAPageBean.processFormRequest(OAPageBean.java:2675)
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## Detail 0 ##
java.lang.NullPointerException
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     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequest(OAWebBeanHelper.java:843)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processFormRequest(OAFormBean.java:395)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:1022)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:988)
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The code breaks at the line 642: totalqty = (Number)row.getQuantityReleased();
I had already taken care of the null value in the VO sql query by using nvl(sum(release_amount), 0).. .so it should return atleast 0, if its null. But it returns "null" all the time.
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hi Keerthi,
thank you.
i tried with below code but still unsuccesfully
+ oaDFF = (OADescriptiveFlexBean)oawebbean.findIndexedChildRecursive("ActFlexField");+
oapagecontext.writeDiagnostics(this, "Niccal: i got DFF handle", 1);
OAMessageTextInputBean mtib = (OAMessageTextInputBean)oaDFF.findChildRecursive("ActFlexField0");
oapagecontext.writeDiagnostics(this, "Niccal: before if", 1);
i am able to print 1° comment line but not second. so i think it's something wrong getting the segment handle.
anyway i'm not able to reach your suggested if statement because execution stops before.
Infact, if i comment line :OAMessageTextInputBean mtib = (OAMessageTextInputBean)oaDFF.findChildRecursive("ActFlexField0");
page doesn't give error and saves data.
any suggestion appreciated,
thanx,
N

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loginf=new TextField(30); loginf.setEnabled(false);
     passf=new TextField(30); passf.setEnabled(false);
     repassf=new TextField(30); repassf.setEnabled(false);
ok=new Button("OK"); ok.setEnabled(false);
     newu=new Button("NEW");
cancel=new Button("Cancel");
     check=new Button("Check Login"); check.setEnabled(false);
vok=new Button("OK");
     iok=new Button("OK");
          lok=new Button("OK");
          mok=new Button("OK");
          sok=new Button("OK");
valid=new Dialog(regis,"Login name is valid !");
     invlog=new Dialog(regis,"Login name already exist!");
     less=new Dialog(regis,"Password is less than six characters !");
mismat=new Dialog(regis,"password & retyped are not matching !");
acucreat=new Dialog(regis,"You have registered successfully !");
     regis.setLayout(null);
//     regis.setBackground(Color.orange);
valid.setLayout(new FlowLayout());
     invlog.setLayout(new FlowLayout());
     less.setLayout(new FlowLayout());
     mismat.setLayout(new FlowLayout());
acucreat.setLayout(new FlowLayout());
id.setBounds(35,50,80,25); //(left,top,width,hight)
idf.setBounds(125,50,40,25);
name.setBounds(35,85,70,25);
namef.setBounds(125,85,150,25);
login.setBounds(35,120,80,25);
loginf.setBounds(125,120,80,25);
check.setBounds(215,120,85,25);
     pass.setBounds(35,155,80,25);
passf.setBounds(125,155,80,25);
repass.setBounds(35,190,80,25);
repassf.setBounds(125,190,80,25);
admin.setBounds(35,225,100,25);
limit.setBounds(145,225,100,25);
          ok.setBounds(45,265,70,25);
     newu.setBounds(135,265,70,25);
cancel.setBounds(225,265,70,25);
     passf.setEchoChar('*');
repassf.setEchoChar('*');
     regis.add(id);
     regis.add(idf);
regis.add(name);
     regis.add(namef);
     regis.add(login);
     regis.add(loginf);
     regis.add(check);
regis.add(pass);
     regis.add(passf);
regis.add(repass);
     regis.add(repassf);
     regis.add(ok);
     regis.add(newu);
     regis.add(cancel);
regis.add(admin);
     regis.add(limit);
valid.add(vok);
     invlog.add(iok);
     less.add(lok);
     mismat.add(mok);
acucreat.add(sok);
ok.addActionListener(this);
     newu.addActionListener(this);
check.addActionListener(this);
cancel.addActionListener(this);
     // limit.addItemListener(this);
     //admin.addItemListener(this);
          vok.addActionListener(this);
          iok.addActionListener(this);
     lok.addActionListener(this);
     mok.addActionListener(this);
     sok.addActionListener(this);
regis.setLocation(250,150);
regis.setSize(310,300);
regis.setVisible(true);
     public void actionPerformed(ActionEvent ae)
     if(ae.getSource()==check)
          try{
               String s2=loginf.getText();
ResultSet rs=db.s.executeQuery("select* from List");
                    while(rs.next())
               if(s2.equals(rs.getString(2).trim()))
//                    invlog.setBackground(Color.orange);
                         invlog.setLocation(250,150);
                         invlog.setSize(300,100);
               cancel.setEnabled(false);
ok.setEnabled(false);
check.setEnabled(false);
                    invlog.setVisible(true);
                         break;
                    else
                    //     valid.setBackground(Color.orange);
                         valid.setLocation(250,150);
                         valid.setSize(300,100);
               cancel.setEnabled(false);
ok.setEnabled(false);
check.setEnabled(false);
               valid.setVisible(true);
                    }catch(Exception e)
               e.printStackTrace();
if(ae.getSource()==newu)
     try{
          ResultSet rs=db.s.executeQuery("select max(ID) from List");
     while(rs.next())
String s1=rs.getString(1).trim();
               int i=Integer.parseInt(s1);
i++;
               String s2=""+i;
idf.setText(s2);
               newu.setEnabled(false);
               namef.setText(""); namef.setEnabled(true);
          loginf.setText(""); loginf.setEnabled(true);
          passf.setText(""); passf.setEnabled(true);
          repassf.setText(""); repassf.setEnabled(true);
          ok.setEnabled(true);
               check.setEnabled(true);
               }catch(Exception e)
          e.printStackTrace();
     if(ae.getSource()==ok)
          try
          String s1=idf.getText();
          String s2=loginf.getText();
          String s3=passf.getText();
     String s4=repassf.getText();
     int x=Integer.parseInt(s1);
     int t;
     if(type.getSelectedCheckbox()==admin)
          t=1;
          else
          t=0;
ResultSet rs=db.s1.executeQuery("select* from List");
               while(rs.next())
               if(s2.equals(rs.getString(2).trim()))
                    invlog.setBackground(Color.orange);
                    invlog.setLocation(250,150);
                    invlog.setSize(300,100);
               cancel.setEnabled(false);
ok.setEnabled(false);
check.setEnabled(false);
                    invlog.setVisible(true);
                    break;
               else
                    if (s3.length()<6)
                    less.setBackground(Color.orange);
                         less.setLocation(250,150);
                         less.setSize(300,100);
               ok.setEnabled(false);
                    cancel.setEnabled(false);
                    check.setEnabled(false);
                    less.setVisible(true);
else if(!(s3.equals(s4)))
                    mismat.setBackground(Color.orange);
                    mismat.setLocation(250,150);
                    mismat.setSize(300,100);
                    ok.setEnabled(false);
                    cancel.setEnabled(false);
                    check.setEnabled(false);
                    mismat.setVisible(true);
                    else
db.s1.execute("insert into User values("+x+",'"+s2+"','"+s3+"',"+t+")");
                    acucreat.setBackground(Color.orange);
                    acucreat.setLocation(250,150);
                    acucreat.setSize(300,100);
                    regis.setVisible(false);
                    acucreat.setVisible(true);
               }//else
          }//while
               } //try
          catch(Exception e1)
          // e1.printStackTrace();
          if (ae.getSource()==cancel)
          regis.setVisible(false);
          if (ae.getSource()==vok)
          ok.setEnabled(true);
               cancel.setEnabled(true);
check.setEnabled(true);
               valid.setVisible(false);
          if (ae.getSource()==iok)
          ok.setEnabled(true);
               cancel.setEnabled(true);
check.setEnabled(true);
               invlog.setVisible(false);
          if (ae.getSource()==lok)
          less.setVisible(false);
               cancel.setEnabled(true);
ok.setEnabled(true);
check.setEnabled(true);
          if (ae.getSource()==mok)
          mismat.setVisible(false);
               cancel.setEnabled(true);
ok.setEnabled(true);
check.setEnabled(true);
if (ae.getSource()==sok)
          acucreat.setVisible(false);
          ok.setEnabled(false);
               newu.setEnabled(true);
               regis.setVisible(true);
     public static void main(String args[])
     new Register();
-----------DBConnect.java------------------------------------
import java.sql.*;
public class DBconnect
Statement s,s1;
Connection c;
public DBconnect()
try
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          c=DriverManager.getConnection("jdbc:odbc:Sonal");
          s=c.createStatement();
s1=c.createStatement();
     catch(Exception e)
     e.printStackTrace();
----------Login.java----------------
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class Login implements ActionListener
Frame log;
Label login,pass;
TextField loginf,passf;
Button ok,cancel;
Dialog invalid;
Button iok;
Register reg;
DBconnect db;
Main m;
Login()
db=new DBconnect();
     log=new Frame();
     log.setLocation(250,210);
     login=new Label("Login :");
pass=new Label("Password :");
     loginf=new TextField(20);
     passf=new TextField(20);
     passf.setEchoChar('*');
     ok=new Button("OK");
     // newu=new Button("New User");
     cancel=new Button("CANCEL");
     iok=new Button(" OK ");
invalid=new Dialog(log,"Invalid User!");
//log.setBackground(Color.cyan);
//log.setForeground(Color.black);
     log.setLayout(null);
     // iok.setBackground(Color.gray);
     invalid.setLayout(new FlowLayout());
     login.setBounds(35,50,70,25); //(left,top,width,hight)
     loginf.setBounds(105,50,100,25);
     pass.setBounds(35,85,70,25);
     passf.setBounds(105,85,70,25);
     ok.setBounds(55,130,70,25);
// newu.setBounds(85,120,80,25);
cancel.setBounds(145,130,70,25);
log.add(login);
log.add(loginf);
log.add(pass);
log.add(passf);
log.add(ok);
// log.add(newu);
log.add(cancel);
     invalid.add(iok);//,BorderLayout.CENTER);
ok.addActionListener(this);
// newu.addActionListener(this);
cancel.addActionListener(this);
     iok.addActionListener(this);
log.setSize(300,170);
log.setVisible(true);
public void actionPerformed(ActionEvent a)
if(a.getSource()==ok)
     try{
          String l=loginf.getText();
          String p=passf.getText();
          ResultSet rs=db.s.executeQuery("select * from List");
          while(rs.next())
          if(l.equals(rs.getString(2).trim())&& p.equals(rs.getString(3).trim()))
                    String tp=rs.getString(4).trim();
                         int tp1=Integer.parseInt(tp);
log.setVisible(false);
if(tp1==1)
                         m=new Main();
                    // m.List.setEnabled(true);
                         else
                         m=new Main();
                         m.List.setEnabled(false);
                    break;
else
               invalid.setBackground(Color.orange);
               invalid.setSize(300,100);
               invalid.setLocation(250,210);
               cancel.setEnabled(false);
          ok.setEnabled(false);
               invalid.setVisible(true);
               }catch(Exception e1)
               e1.printStackTrace();
     if (a.getSource()==cancel)
     log.setVisible(false);
     if (a.getSource()==iok)
     invalid.setVisible(false);
     loginf.setText("");
     passf.setText("");
     cancel.setEnabled(true);
ok.setEnabled(true);
     public static void main(String[] args)
     new Login();
-------------inquiry.java---------------------------------
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.Date;
import java.text.*;
import java.sql.*;
public class Inquiry implements ActionListener
Frame inqry;
Label name,addr;
TextField namef,addrf;
Button ok,cancel,dok;
Dialog invalid;
Frame result; //Result of the inquiry....
Label lrname,lraddr,lward,lrdate,lcdate;
TextField rname,raddr,ward,rdate,cdate;
Date d;
DateFormat df;
Button rok,rcancel;
Dialog success;
Button rdok;
DBconnect db;
Inquiry()
          db=new DBconnect();
          inqry=new Frame("Inquiry Form");
          inqry.setLayout(null);
inqry.setBackground(Color.cyan);
          name=new Label(" NAME ");
          addr=new Label("ADDRESS");
          namef=new TextField(20);
          addrf=new TextField(20);
          ok=new Button("OK");
          cancel=new Button("CANCEL");
          dok=new Button("OK");
          invalid=new Dialog(inqry,"Invalid Name or Address !");
          invalid.setSize(300,100);
     invalid.setLocation(300,180);
          invalid.setBackground(Color.orange);
          invalid.setLayout(new FlowLayout());
result=new Frame(" INQUIRY RESULT "); //Result Window......
result.setLayout(null);
result.setBackground(Color.cyan);
lcdate=new Label(" DATE ");
     lrname=new Label(" NAME ");
lraddr=new Label(" ADDRESS ");
     lward=new Label(" WARD ");
     lrdate=new Label(" ADMIT-DATE ");
cdate=new TextField(10);
     rname=new TextField(20);
rname.setEnabled(false);
     raddr=new TextField(20);
     raddr.setEnabled(false);
     ward=new TextField(20);
     ward.setEnabled(false);
     rdate=new TextField(10);
     rdate.setEnabled(false);
     cdate=new TextField(20);
     d=new Date();
     df=DateFormat.getDateInstance(DateFormat.MEDIUM,Locale.KOREA);
     cdate.setText(df.format(d));
     cdate.setEnabled(false);
rok=new Button(" OK ");
     rcancel=new Button("CANCEL");
          name.setBounds(40,50,50,25);
namef.setBounds(120,50,130,25);
addr.setBounds(40,100,60,25);
addrf.setBounds(120,100,80,25);
ok.setBounds(60,145,70,25);
          cancel.setBounds(140,145,70,25);
          lcdate.setBounds(200,50,60,25); //Result Window......
cdate.setBounds(270,50,80,25);
lrname.setBounds(35,85,70,25);
rname.setBounds(140,85,180,25);
lraddr.setBounds(35,120,80,25);
     raddr.setBounds(140,120,100,25);
lward.setBounds(35,155,80,25);
ward.setBounds(140,155,100,25);
lrdate.setBounds(30,190,80,25);
rdate.setBounds(140,190,80,25);
rok.setBounds(70,240,70,25);
rcancel.setBounds(170,240,70,25);
          inqry.add(name);
          inqry.add(namef);
          inqry.add(addr);
          inqry.add(addrf);
          inqry.add(ok);
          inqry.add(cancel);
invalid.add(dok);
     result.add(lcdate); //Result Window......
     result.add(cdate);
          result.add(lrname);
          result.add(rname);
          result.add(lraddr);
          result.add(raddr);
          result.add(lward);
          result.add(ward);
          result.add(lrdate);
          result.add(rdate);
          result.add(rok);
          result.add(rcancel);
     ok.addActionListener(this);
     cancel.addActionListener(this);
     dok.addActionListener(this);
rok.addActionListener(this); //Result Window......
     rcancel.addActionListener(this);
     inqry.setSize(280,180);
     inqry.setLocation(300,180);
     inqry.setVisible(true);
          result.setSize(400,280); //Result Window......
     result.setLocation(200,150);
     result.setVisible(false);
          public void actionPerformed(ActionEvent ae)
               if(ae.getSource()==ok)
               try
                         String nm=namef.getText();
                         String ad=addrf.getText();
                         inqry.setVisible(false);
                         ResultSet rs=db.s.executeQuery("select * from Billinformation");
                         while(rs.next())
                              String nm1=rs.getString(2).trim();
                              String ad1=rs.getString(3).trim();
                              int k=0;
                              if((nm1.equals(nm))&&(ad1.equals(ad)))
                         String adm=rs.getString(5).trim();
                         String wr=rs.getString(6).trim();
                         String bd=rs.getString(8).trim();
                              String wrb=wr+"-"+bd;
result.setVisible(true);
                              rname.setText(nm1);
                         raddr.setText(ad1);
                         ward.setText(wrb);
                         rdate.setText(adm);
k=1;
                              break;
                              }//if
                         else if(k==1)
                         invalid.setVisible(true);
                         }//while
}//try
                         catch(Exception e)
                         e.printStackTrace();
                    } //getsource ==ok
               if(ae.getSource()==cancel)
inqry.setVisible(false);
                    if(ae.getSource()==rok) //Result Window......
                    namef.setText("");
                         addrf.setText("");
                         result.setVisible(false);
                    inqry.setVisible(true);
if(ae.getSource()==rcancel)
result.setVisible(false);
                    if(ae.getSource()==dok)
                    namef.setText("");
                         addrf.setText("");
                         invalid.setVisible(false);
                         inqry.setVisible(true);
     public static void main(String args[])
          new Inquiry();
PLease Help me !!
I need this urgently.

can you explain what your program tries to do... and
at where it went wrong..Sir,
We are trying to make an project where we can make a person register in our data base & after which he/she can search for other user.
The logged in user can modify his/her own data but can view other ppl's data.
We are in a phase of registering the user & that's where we are stuck. The problem is that after the login screen when we hit register (OK- button) the data are not getting entered in the data base.
Can u please help me??
I am using "jdk1.3' - studnet's edition.
I am waiting for your reply.
Thanks in advance & yr interest.

[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] 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

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

Null Point Exception Error

Hi All
        I have to add an input field which will accept email Id from users. This field has to be kept mandatory. I have kept a check on the value entered. If the user does not enter any value, an error message should be displayed. Below is the code that I have written. Whenever, the user keeps this field blank and submits the form, null point exception error is displayed.
Please help how to overcome this problem
email = wdContext.currentContextElement().getEmail_Id();
         try{
          if (wdContext.currentContextElement().getEmail_Id().equals("") )
               IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();
               msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);
     else

Hi,
Change the following code to
email = wdContext.currentContextElement().getEmail_Id();
try{
if (wdContext.currentContextElement().getEmail_Id().equals("") )
IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();
msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);
if (wdContext.currentContextElement() != null)
    email = wdContext.currentContextElement().getEmail_Id();
if ( email.equals("") )
IWDMessageManager msg = wdThis.wdGetAPI().getComponent().getMessageManager();
msg.reportMessage(IMessageTender_ResignationComp.PERSONAL_EMAIL_ID,new Object[]{"Please enter correct Email Id"},true);
Regards
Ayyapparaj

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?!

Java null pointer exception

Hey guys,
Im having a problem with the following code:
    public void testVariable(Object a, Object b)
        if(a!=null || b!=null)
            Object reta = null;
            Object retb = null;
            String tempa = null;
            String tempb = null;
            if(a.toString() !=null && b.toString() !=null)    <---- Null pointer exception
                tempa = a.toString();
                tempb = b.toString();
                tempa = tempa.toLowerCase();
                tempb = tempb.toLowerCase();
            }Im getting a null pointer exception when i do that if statement, ive narrowed it down and found that that was the problem but I have no idea why?
any suggestions ?

if (a!=null || b!=null)...If a is not null, OR b is not null, do the following statements.
if( a.toString() !=null && b.toString() !=null ) ...Perform an operation on a, converting it to a string. This will throw a null pointer exception if a is null. If we survive that, see if the resulting string is null (toString methods should never return null here in fact).
Perform an operation b, converting it to a a string. This will throw a null pointer exception if b is null. If we survive that, see if the resulting string is null (toString methods should never return null here in fact).
So if either a or b is null, but the other one isn't, you will get a null pointer exception.
Edited by: dcminter on 27-Apr-2008 17:51

Java Null Pointer Exception when assigning a value to an Object Array

I am working on a webservice where the request can contain a dynamic array of SingleOwnerRequestNodeDetail objects. I need to read these objects in and sort them according to an orderNbr that is contained in the object.
I am attempting to read these object into a Comparable class and sort them. I am having problems when I try to insert the objects into my object array ComparableBO[]. I get the following error: Exception during processing: java.lang.NullPointerException
Any assistance would be greatly appreciated.
Here's my class:
public class ComparatorBO implements Comparable {
     private SingleOwnerRequestNodeDetail nodeDetailInfo;
     private int orderNbr;
     public SingleOwnerRequestNodeDetail getNodeDetailInfo() {
          return nodeDetailInfo;
     public void setNodeDetailInfo(SingleOwnerRequestNodeDetail nodeDetailInfo) {
          this.nodeDetailInfo = nodeDetailInfo;
     public int getOrderNbr() {
          return Integer.parseInt(nodeDetailInfo.getSingleOwnerRequestOrderNbr());
     public void setOrderNbr (int orderNbr) {
          this.orderNbr = orderNbr;
     public int compareTo(Object anotherNodeDetailInfo)throws ClassCastException {
          if (!(anotherNodeDetailInfo instanceof ComparatorBO))
               throw new ClassCastException ("An single owner request node detail object is expected");
          int anotherNodeDetailOrderNbr = ((ComparatorBO)anotherNodeDetailInfo).getOrderNbr();
          return this.orderNbr - anotherNodeDetailOrderNbr;
}Here's the code where I read in the objects and attempt to place them in the comparableBO[]
ComparatorBO[] comparatorBOArray = null;
comparatorBOArray = new ComparatorBO[requestInfo.length];
          for (int i=0; i < requestInfo.length; i++)
               SingleOwnerRequestNodeDetail nodes = new SingleOwnerRequestNodeDetail();
               ComparatorBO comparatorBO = new ComparatorBO();
               nodes.setSingleOwnerRequestNodeID(requestInfo.getSingleOwnerRequestNodeID());
               nodes.setSingleOwnerRequestNodeType(requestInfo[i].getSingleOwnerRequestNodeType());
               nodes.setSingleOwnerRequestOpCode(requestInfo[i].getSingleOwnerRequestOpCode());
               nodes.setSingleOwnerRequestOrderNbr(requestInfo[i].getSingleOwnerRequestOrderNbr());
               comparatorBO.setNodeDetailInfo(nodes);
               *comparatorBOArray[i].setNodeDetailInfo(comparatorBO.getNodeDetailInfo());*
               comparatorBOArray[i].setOrderNbr(Integer.parseInt(nodes.getSingleOwnerRequestOrderNbr()));

imadeveloper wrote:
I am working on a webservice where the request can contain a dynamic array of SingleOwnerRequestNodeDetail objects. I need to read these objects in and sort them according to an orderNbr that is contained in the object.
I am attempting to read these object into a Comparable class and sort them. I am having problems when I try to insert the objects into my object array ComparableBO[]. I get the following error: Exception during processing: java.lang.NullPointerException
Any assistance would be greatly appreciated.
Here's my class:
public class ComparatorBO implements Comparable {
     private SingleOwnerRequestNodeDetail nodeDetailInfo;
     private int orderNbr;
     public SingleOwnerRequestNodeDetail getNodeDetailInfo() {
          return nodeDetailInfo;
     public void setNodeDetailInfo(SingleOwnerRequestNodeDetail nodeDetailInfo) {
          this.nodeDetailInfo = nodeDetailInfo;
     public int getOrderNbr() {
          return Integer.parseInt(nodeDetailInfo.getSingleOwnerRequestOrderNbr());
     public void setOrderNbr (int orderNbr) {
          this.orderNbr = orderNbr;
     public int compareTo(Object anotherNodeDetailInfo)throws ClassCastException {
          if (!(anotherNodeDetailInfo instanceof ComparatorBO))
               throw new ClassCastException ("An single owner request node detail object is expected");
          int anotherNodeDetailOrderNbr = ((ComparatorBO)anotherNodeDetailInfo).getOrderNbr();
          return this.orderNbr - anotherNodeDetailOrderNbr;
}Here's the code where I read in the objects and attempt to place them in the comparableBO[]
ComparatorBO[] comparatorBOArray = null;
comparatorBOArray = new ComparatorBO[requestInfo.length];
          for (int i=0; i < requestInfo.length; i++)
               SingleOwnerRequestNodeDetail nodes = new SingleOwnerRequestNodeDetail();
               ComparatorBO comparatorBO = new ComparatorBO();
               nodes.setSingleOwnerRequestNodeID(requestInfo.getSingleOwnerRequestNodeID());
               nodes.setSingleOwnerRequestNodeType(requestInfo[i].getSingleOwnerRequestNodeType());
               nodes.setSingleOwnerRequestOpCode(requestInfo[i].getSingleOwnerRequestOpCode());
               nodes.setSingleOwnerRequestOrderNbr(requestInfo[i].getSingleOwnerRequestOrderNbr());
               comparatorBO.setNodeDetailInfo(nodes);
               *comparatorBOArray[i].setNodeDetailInfo(comparatorBO.getNodeDetailInfo());*
               comparatorBOArray[i].setOrderNbr(Integer.parseInt(nodes.getSingleOwnerRequestOrderNbr()));
Well normally when someone wont tell me what line the error occured in I copy paste their code into my compiler and find out. But you have other classes which you have not shown us so I cannot help you.
Incase you missed my point, please tell us where the error occured!

SQL Developer EA 3.1 -Java Null pointer exception when loading model viewer

a) I have a simple 3 node flow -- 1) DataSource selects CLOB and VARCHAR column; 2) BuildText node transforms CLOB into NESTED COLUMN; 3) ClustBuild node build K-Means cluster
b) The "run" step succeeds for all three nodes, however when I try to launch the viewer for the cluster model, it fails with the stack trace below after 5 mins or so. I have a custom stoplist for the BuildText node that extends the "English" stoplist. If I replace the custom stoplist with the "default" (the English stoplist I believe), then the viewer loads without the exception.
NB) Database version is 11.2.0.1.0, Sql Dev build is 3.1.06 Build MAIN-06-44
java.lang.NullPointerException
     at oracle.dmt.dataminer.mviewer.clustering.tree.model.ClusterTreeSDMModel.load(ClusterTreeSDMModel.java:57)
     at oracle.dmt.dataminer.mviewer.clustering.tree.ClusteringTreeEditor.load(ClusteringTreeEditor.java:412)
     at oracle.dmt.dataminer.mviewer.clustering.tree.ClusteringTreeEditor.open(ClusteringTreeEditor.java:251)
     at oracle.ideimpl.editor.EditorState.openEditor(EditorState.java:283)
     at oracle.ideimpl.editor.EditorState.createEditor(EditorState.java:184)
     at oracle.ideimpl.editor.EditorState.getOrCreateEditor(EditorState.java:95)
     at oracle.ideimpl.editor.SplitPaneState.canSetEditorStatePos(SplitPaneState.java:232)
     at oracle.ideimpl.editor.SplitPaneState.setCurrentEditorStatePos(SplitPaneState.java:195)
     at oracle.ideimpl.editor.TabGroupState.createSplitPaneState(TabGroupState.java:102)
     at oracle.ideimpl.editor.TabGroup.addTabGroupState(TabGroup.java:379)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1403)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1337)
     at oracle.ideimpl.editor.EditorManagerImpl.openEditor(EditorManagerImpl.java:1263)
     at oracle.ide.editor.EditorUtil.openDefaultEditorInFrame(EditorUtil.java:164)
     at oracle.dmt.dataminer.workflow.WorkflowContextMenu$2.actionPerformed(WorkflowContextMenu.java:746)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
     at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
     at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
     at java.awt.Component.processMouseEvent(Component.java:6504)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
     at java.awt.Component.processEvent(Component.java:6269)
     at java.awt.Container.processEvent(Container.java:2229)
     at java.awt.Component.dispatchEventImpl(Component.java:4860)
     at java.awt.Container.dispatchEventImpl(Container.java:2287)
     at java.awt.Component.dispatchEvent(Component.java:4686)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
     at java.awt.Container.dispatchEventImpl(Container.java:2273)
     at java.awt.Window.dispatchEventImpl(Window.java:2713)
     at java.awt.Component.dispatchEvent(Component.java:4686)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
     at java.awt.EventQueue.access$000(EventQueue.java:101)
     at java.awt.EventQueue$3.run(EventQueue.java:666)
     at java.awt.EventQueue$3.run(EventQueue.java:664)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
     at java.awt.EventQueue$4.run(EventQueue.java:680)
     at java.awt.EventQueue$4.run(EventQueue.java:678)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Edited by: user809775 on Dec 19, 2011 11:31 AM

Hi,
We have been working on some performance issues tied to viewing large cluster models.
Maybe... this is tied to that.
1) Can you run the following query in sql worksheet to see how many distinct attributes are in the root cluster node. Just replace the 'CLUS_KM_1_16' value with your model name.
SELECT count(distinct(h.attribute_name || h.attribute_subname))
FROM TABLE(DBMS_DATA_MINING.GET_MODEL_DETAILS_KM('CLUS_KM_1_16',1,NULL, 0, 1, 0)) t,
TABLE(t.histogram) h
2) Can you launch the client with the console window to see if there is an earlier exception that is being eaten that is leading to the final exception.
You can do this by using the finding the following executable and using it to launch sql dev:
C:\<SQL DEV INSTALL FOLDER>\sqldeveloper\sqldeveloper\bin\sqldeveloper.exe
3) Of course, recreating the problem on our side is necessary. This might be difficult without opening a support ticket, but if you are able to post a script that creates a table using some demo data that ships with the db, we should be able to determine the problem pretty quickly.
Thanks, Mark

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

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