Shared java static variables

I have an application where I would like to
read from some small configuration tables
and cache them into java variables, in order to avoid each stored procedure call to redo
those queries. The configuration data is
pretty static, so I don't worry about refresh
problems.
My first attempt to do that was using static
final variables (like Vector). In our oracle
environment however (8.1.7) each session
seems to have its own copy of static final
variables, resulting in each session to
perform those queries for initializing all
over again.
firstly, i would like to find out if there is another way to share this data among java
sessions, but otherwise I am curious how
I can get the claims made in http://technet.oracle.com/products/oracle8i/pdf/8ir2java.pdf , page 6 to work.
Specifically, here is what the document says:
"In Oracel8i Release 2, JServer introduces the concept of "hotloaded" classes. Various core classes that
initialize static variables known to be constant are pre-initialized during database creation time. When you use
one of these classes in your program, the class loader loads the pre-initialized form. In many cases, the time
required to initialize the static variables is itself quite significant, and now with the introduction of hotloaded
classes that time is completely eliminated. In addition, the objects in these particular static variables are shared
among all sessions. Hotloaded classes therefore improve performance by eliminating class initialization and
they reduce per-user-session footprint by increasing the amount of data shared between sessions. Hotloaded
classes provide improved performance and scalability "for free", with no user intervention. "
the kind of initialization I have been
trying is like:
public static final int inti = func();
this also didn't seem to work:
public static final int inti;
static {
inti = ....;
thanks,
null

Similar Messages

Java static variables in Stored Java

I'm wondering if someone in Oracle could relate their thinking with regards to static variables in stored java and why were these implemented as they were. The aspect I'm referring to specifically is how these are basically working as PLSQL package variables, i.e. with state maintained for the life of the session.
Outside the database, in the "normal" Java world, statics will only live as long as the program is running. But in the Oracle DB world, the static continues to live as long as the session. With this in mind, doesn't this difference compromise the idea of just inserting working Java code into the Database? i.e. static variables now have to be initialized every time a method is called, and cannot be assumed to have default values. Does that not seem like a rather large departure from what a non-DB java programmer would be doing?
Thanks in advance for your thoughts on this.
Joe Tseng

It should generally be the case that all calls in a session see the same static variable values. Some actions will terminate the java session (and lose the static variable state) without ending the RDBMS session, such as calling System.exit from java, but normally this can't happen within a single RDBMS call. Perhaps if you give more details on how you are making the call from java to PLSQL one could say more. In particular, if the call happens to be via the JDBC thin driver then the session running in the JDBC connection will be distinct from the calling session.

Static variable, a bug in applet classloader, Java plug-in?

I found a potential bug in java plug-in.
Environment,
1. IE 6.0
2. Windows XP
3. JRE 1.3.1.06 and JRE 1.4.1.01
Steps,
1. build a very simple applet (attached below)
2. embed the applet into a .html page.
3. enable java plug-in for IE and Netscape.
4. launch the .html page in either of the two browsers.
5. for the 1st time, I can see 'tmp = 0' in the java console window.
6. keep the browser open, browse to 'www.google.com'
7. click 'Back' button of the browser.
8. I notice 'tmp = 1' in the java console window.
9. if I browse to google.com and back again, it will display 'tmp = 2'. and the number will keep on increasing if I repeat those steps.
10. But if I press F5 to refresh the page, the log message will go back to 'tmp = 0'. and if I press 'x' inthe console window to clean up the classloader cache, I will get 'tmp = 0'. If I close the browser and open a new one, I will still get 'tmp = 0', which is what the applet should output.
11. If I click 't' in the console window to list the thread while I am in the 'google' page, I can't see the applet thread, which means the applet should have been destroyed.
12. No matter I try 'g' to do garbage collect, or 'f' to finalize objects, the problem still happens. the only solution is what I did in the step 10.
Is it a bug in the classloader or the JRE itself? Why the value of the static variable won't be cleaned up along with the applet?
----------- HERE IS THE APPLET --------------------
import java.applet.Applet;
public class AA extends Applet
private static long tmp = 0;
public void init() {
System.out.println("tmp value = " + tmp);
tmp++;
public void start() {}
public void stop() {}
public void destroy() {}

Static values are stored in the class. Once a class is loaded into a classloader, it cannot be unloaded (the only thing you can do is use another classloader).
Apparently, the classloader cache allows sharing of classloaders between applet instances. Perhaps F5 (reload) causes the classloader cache to be cleared.
I don't see any bug. When developing applications or applets that must run in the same JVM, you should program defensively and avoid using static values which can change over time.

When should I use static variable and when should not? Java essential

When should I use static variable and when should not? Java essential

Static => same value for all instances of the class.
Non-static => each instance can have its own value.
Which you need in which circumstances is completely up to you.

How to read static variable defined java class from flex?

This is a beginner question. If I use remoteClass to map a java class and a flex class, how can I access a static variable defined in java class from the flex code?
Thanks!

Static propeties are by default ignored in the blazeds for serialization. You can try using another global property in the java bean which maps to the value stored in the static property( Hopefully it should work)
eg,
public String instanceValue = ClassName.staticValue;
Ref: http://livedocs.adobe.com/blazeds/1/blazeds_devguide/help.html?content=serialize_data_3.ht ml

Java inherited static operations on static variables

How does one force a static method in a base class to operate (read/modify) on static variables in the base class and all of its subclasses ?
From what I've seen, static methods aren't truly inherited; just invoked from the sub-classes within the super's context !! Am I mistaken ?

It seems I've incorrectly (more like, incompletely) phrased the 1st part of the question to cause a concern in your response. I hate fundamentally flawed approaches as well :-) My title still holds good, though.
Rephrasing:
How does one allow a static method defined in a base class, that can already operate (read/modify) on its own static variables, be inheritable in the subclasses, so that they too can use this method to operate on their over-ridden static variables, without the subclasses having to redefine them ?
Partial Problem Definition:
Way before any instances of some of the above-discussed classes are created, the classes should be able to fill in a common static variable with data that is unique to the particular class in question. Especially when these so-called static variables are declared final. Therefore, a superclass (in this case the root) can define this method once, and all subclasses would inherit this class method during their class-object initialization and accordingly fill in their 2 cents worth of value in a given static variable - which in this case will have the same name in all the classes involved. This static variable can represent anything - time-of-class-creation, class-level random number etc.,
An apparently silly example:
Class A {
protected static final String canonicalClassName = getMyClassName();
protected static String getMyClassName() {
// Implementation
Class B {
protected static final String canonicalClassName = getMyClassName();
What would the commented implementation in getMyClassName() be, so that all subclasses can take advantage of (WITHOUT re-defining) the super's method ?
Edited by: Matt0000 on Apr 17, 2008 2:21 PM

Static variable in session bean

Can we declare static variable in session bean. If we declare what will happen. Will it create error in compile time or not deployed in server.

From a Java language perspective, nothing stops you from declaring a static variable in a session
bean class. It will compile as long as its syntactically correct.
From an EJB programming model perspective, the use of non-final static variables
is discouraged because it breaks the JVM-transparency that is an important aspect of the
EJB architecture. It should be possible to deploy a single EJB application to a cluster and
have it behave exactly as if it were deployed to only one server instance (albeit with higher
overall throughput/performance). Using non-final static variables breaks this property
because the bean instances in one JVM will see a different value for the static variable
than bean instances in a different JVM.
It also forces you to deal with synchronization
of the shared data, which is a complexity that was carefully avoided in the EJB programming
model by ensuring that each bean instance is single-threaded.
Bottom line is you can have "final static" data members in EJB classes but you should
avoid non-final (mutable) static data.
--ken

Modifying static variable in 1object dosent effect value in another object

Hi,
I have a simple class that declares a static variable x...
class DeclareStatic
     static int x = 10;
}I have another class that modifies this static variable (x)...
class ModifyStatic
     public static void main(String[] Args)
          DeclareStatic.x = 20;
}The problem I have is when I run the next class to simply print out the static variable x, I get 10 (the originally assigned value), not 20 (the modified value)...
class StaticTest
     public static void main(String[] Args)
          System.out.println(DeclareStatic.x);
}It is my understanding that by definition of being static, there is only 1 copy of this static variable(x), shared amongst all objects. Therefore, when I attempt to modify this value with a direct reference (DeclareStatic.x =20;), why isn't the change refelected in other classes which access the variable?
This also leads to the question how DO I modify a (non final) static variable from an object and have the change reflected in all other objects?
I have spent some time researching this on-line and in my java books to no avail, any help is greatly appreciated as I am studying to sit the SCJP and attention to detail is everything!
Thanks,
Alan Kilbride ;o)

Hi,
I have a simple class that declares a static variable
x...
class DeclareStatic
     static int x = 10;
}I have another class that modifies this static
variable (x)...
class ModifyStatic
     public static void main(String[] Args)
          DeclareStatic.x = 20;
}The problem I have is when I run the next class to
simply print out the static variable x, I get 10 (the
originally assigned value), not 20 (the modified
value)...
class StaticTest
     public static void main(String[] Args)
          System.out.println(DeclareStatic.x);
}It is my understanding that by definition of being
static, there is only 1 copy of this static
variable(x), shared amongst all objects. Therefore,
when I attempt to modify this value with a direct
reference (DeclareStatic.x =20;), why isn't the
change refelected in other classes which access the
variable?Because your test code never makes a reference to the ModifyStatic class. You could delete ModifyStatic from your system and the code would run exactly the same.
Jim S.

Static variable behaviour in memory

Hi,
My question is :
When you compile a java code, does the static variable gets the memory allocated while creating the byte code or is it on run time that a static variable gets the memory allocation and then it is shared for all instances.
Thanks
Melvyn.

Good !!! I expected this question from you.
Instantiation and Initialization are different.
A class or interface type T will be initialized immediately before the first occurrence of any one of the following:
1) T is a class and an instance of T is created.
2) T is a class and a static method declared by T is invoked.
3) A static field declared by T is assigned.
4) A static field declared by T is used and the reference to the
field is not a compile-time constant. References to
compile-time constants must be resolved at compile time to
a copy of the compile-time constant value, so uses of such a
field never cause initialization.
Regards
Raghu

Slow performance when multiple threads access static variable

Originally, I was trying to keep track of the number of function calls for a specific function that was called across many threads. I initially implemented this by incrementing a static variable, and noticed some pretty horrible performance. Does anyone have an ideas?
(I know this code is "incorrect" since increments are not atomic, even with a volatile keyword)
Essentially, I'm running two threads that try to increment a variable a billion times each. The first time through, they increment a shared static variable. As expected, the result is wrong 1339999601 instead of 2 billion, but the funny thing is it takes about 14 seconds. Now, the second time through, they increment a local variable and add it to the static variable at the end. This runs correctly (assuming the final increment doesn't interleave which is highly unprobable) and runs in about a second.
Why the performance hit? I'm not even using volatile (just for refernce if I make the variable volatile runtime hits about 30 seconds)
Again I realize this code is incorrect, this is purely an interesting side-expirement.
package gui;
public class SlowExample implements Runnable
     public static void main(String[] args)
          SlowExample se1 = new SlowExample(1, true);
          SlowExample se2 = new SlowExample(2, true);
          Thread t1 = new Thread(se1);
          Thread t2 = new Thread(se2);
          try
               long time = System.nanoTime();
               t1.start();
               t2.start();
               t1.join();
               t2.join();
               time = System.nanoTime() - time;
               System.out.println(count + " - " + time/1000000000.0);
               Thread.sleep(100);
          catch (InterruptedException e)
               e.printStackTrace();
          count = 0;
          se1 = new SlowExample(1, false);
          se2 = new SlowExample(2, false);
          t1 = new Thread(se1);
          t2 = new Thread(se2);
          try
               long time = System.nanoTime();
               t1.start();
               t2.start();
               t1.join();
               t2.join();
               time = System.nanoTime() - time;
               System.out.println(count + " - " + time/1000000000.0);
          catch (InterruptedException e)
               e.printStackTrace();
           * Results:
           * 1339999601 - 14.25520115
           * 2000000000 - 1.102497384
     private static int count = 0;
     public int ID;
     boolean loopType;
     public SlowExample(int ID, boolean loopType)
          this.ID = ID;
          this.loopType = loopType;
     public void run()
          if (loopType)
               //billion times
               for (int a=0;a<1000000000;a++)
                    count++;
          else
               int count1 = 0;
               //billion times
               for (int a=0;a<1000000000;a++)
                    count1++;
               count += count1;
}

Peter__Lawrey wrote:
Your computer has different types of memory
- registers
- level 1 cache
- level 2 cache
- main memory.
- non CPU local main memory (if you have multiple CPUs with their own memory banks)
These memory types have different speeds. Depending on how you use a variable affects which memory it is placed in.Plus you have the hotspot compiler kicking in sometime during the run. In other words for some time the VM is interpreting the code and then all of a sudden its compiled and executing the code compiled. Reliable micro benchmarking in java is not easy. See [Robust Java benchmarking, Part 1: Issues|http://www.ibm.com/developerworks/java/library/j-benchmark1.html]

Error on compile - non-static variable can not be referencedfrom static con

Error on compile happening with addButton?
Thanks
import java.awt.*;
import java.awt.event.*;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JFrame;
public class Log implements ActionListener {
JButton addButton;
public static void addComponentsToPane(Container pane) {
pane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
     c.gridy = 3;
c.gridx = 0;
     JLabel callsignLabel= new JLabel("Callsign");
pane.add(callsignLabel, c);
     c.gridy = 3;
c.gridx = 1;
     JLabel nameLabel= new JLabel("Name");
pane.add(nameLabel, c);
     c.gridy = 3;
c.gridx = 2;
     JLabel timeLabel= new JLabel("Time");
pane.add(timeLabel, c);
     c.gridy = 3;
c.gridx = 3;
     JLabel dateLabel= new JLabel("Date");
pane.add(dateLabel, c);
     c.gridy = 3;
c.gridx = 4;
     JLabel frequencyLabel= new JLabel("Freq ");
pane.add(frequencyLabel, c);
     c.gridy = 3;
c.gridx = 5;
     JLabel locationLabel = new JLabel("Country/State");
pane.add(locationLabel, c);
c.gridy = 5;
c.gridx = 0;
     addButton = new JButton("Add");
pane.add(addButton, c);
     addButton.addActionListener(this);

Thank you for the reply
I am new to Java
What is wrong with the way it is coded?The error message tells you what's wrong: You're trying to reference a non-static variable from a static context.
If you don't know what that means, then click the link I provided and look at the results from that google search. You might have to go through a few before you find a satisfactory explanation. And after you've done that, if you have specific questions about things you didn't understand there, please post again.

Using a static variable declared in an applet in another class

Hi guys,
I created an applet and i want to use one of the static variables declared in teh applet class in another class i have. however i get an error when i try to do that...
in my Return2 class i try to call the variable infoPanel (declared as a static JPanel in myApplet...myApplet is set up like so:
public class myApplet extends JApplet implements ActionListener, ListSelectionListener
here are some of the lines causing a problem in the Return2 class:
myApplet.infoPanel.removeAll();
myApplet.infoPanel.add(functionForm2.smgframeold);
myApplet.infoPanel.validate();
myApplet.infoPanel.repaint();
here are some of the errors i get
dummy/Return2.java [211:1] package myApplet does not exist
myApplet.infoPanel.removeAll();
^
dummy/Return2.java [212:1] package myApplet does not exist
myApplet.infoPanel.add(functionForm2.smgframeold);
^
dummy/Return2.java [213:1] package myApplet does not exist
myApplet.infoPanel.validate();
^
dummy/Return2.java [214:1] package myApplet does not exist
myApplet.infoPanel.repaint();
^
please help! thanks :)

I don't declare any packages though....i think it just doesn't recognize myApplet for some reason..
other errors i got compiling are:
dummy/Return2.java [82:1] cannot resolve symbol
symbol : variable myApplet
location: class Return2
updateDesc.setString(3, myApplet.staticName);
I Don't get why i'm getting this error cuase they worked fine when myApplet was a standalone application, not an applet.
myApplet is in the same folder as Return2 and it compiles properly.

Calling a java static method from javascript

I am running into issue while calling a java static method with a parameter from javascript. I am getting the following error. Any help is greatly appreciated.
Thx
An error occurred at line: 103 in the jsp file: /jnlpLaunch.jsp
pfProjectId cannot be resolved to a variable
=================================================
// Java static method with one parameter
<%!
public static void CreateJnlpFile(String pfProjectId)
%>
//Script that calls java static method
<script language="javascript" type="text/javascript">
var pfProjectId = "proj1057";
// Here I am calling java method
<%CreateJnlpFile(pfProjectId);%>
</script>
===================================================
Edited by: 878645 on Mar 6, 2012 11:30 PM

Thanks, Got what you are telling. Right now I have one jsp file which is setting the parameter 'pfProjectId' and in another .jsp I am retrieving it. But I am getting null valuue
for the variable. I am wondering why I am getting null value in the second jsp page?.
Thx
====================================================================
<script language="javascript" type="text/javascript">
// Setting parameter pfProjectId
var pfProjectId = "proj1057";
request.setParameter("pfProjectId", "pfProjectId");
</script>
// Using Button post to call a .jsp that creates jnlp file
<form method=post action="CreateJnlpFile.jsp">
<input type="submit" value="Create JNLP File">
</form>
//Contents of second .jsp file CreateJNLPFile.jsp
String pfProjectId = request.getParameter("pfProjectId ");
System.out.println( "In CreateJnlpFile.jsp pfProjectId " + pfProjectId );
=======================================================

Non-static variable Help needed

Hi, I am creating a multi threaded web server but get the following error
non-static variable this cannot be referenced from a static context
HttpRequest request = new HttpRequest(connectionSocket);
Please could someone help.
Many Thanks
import java.io.* ;
import java.net.* ;
import java.util.* ;
public final class MultiWebServer
public static void main(String argv[]) throws Exception
     // Set the port number.
     int port = 6789;
// Establish the listen socket.
               String fileName;
               ServerSocket listenSocket = new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while (true) {
     // Listen for a TCP connection request.
     Socket connectionSocket = listenSocket.accept();
// Construct an object to process the HTTP request message.
HttpRequest request = new HttpRequest(connectionSocket);
// Create a new thread to process the request.
Thread thread = new Thread(request);
// Start the thread.
thread.start();
final class HttpRequest implements Runnable
     final static String CRLF = "\r\n";
     Socket socket;
String requestMessageLine;
String fileName;
Date todaysDate;
     // Constructor
     public HttpRequest(Socket socket) throws Exception
          this.socket = socket;
          socket = null;
// Implement the run() method of the Runnable interface.
public void run()
     try {
          processRequest();
     } catch (Exception e) {
          System.out.println(e);
private void processRequest() throws Exception
     // Get a reference to the socket's input and output streams.
     //InputStream is = new InputStream(socket.getInputStream());
     //DataOutputStream os = new DataOutputStream(socket.getOutputStream());
BufferedReader inFromClient =
                    new BufferedReader(new InputStreamReader(
                         socket.getInputStream()));
               DataOutputStream outToClient =
                    new DataOutputStream(
                         socket.getOutputStream());
     // Set up input stream filters.
     requestMessageLine = inFromClient.readLine();
     //BufferedReader br = null;
     // Get the request line of the HTTP request message.
String requestLine = null;
// Display the request line.
System.out.println();
System.out.println(requestLine);
StringTokenizer tokenizedLine =
                         new StringTokenizer(requestMessageLine);
               if (tokenizedLine.nextToken().equals("GET"))
                    fileName = tokenizedLine.nextToken();
                    if ( fileName.startsWith("/")==true )
                         fileName = fileName.substring(1);
File file = new File(fileName);
                    int numOfBytes = (int)file.length();
                    FileInputStream inFile = new FileInputStream(fileName);
                    byte[] fileInBytes = new byte[numOfBytes];
                    inFile.read(fileInBytes);
                    /* Send the HTTP header */
                    outToClient.writeBytes("HTTP/1.1 200 Document Follows\r\n");
                    if (fileName.endsWith(".jpg"))
                         outToClient.writeBytes("Content-Type: image/jpeg\r\n");
                    if (fileName.endsWith(".jpeg"))
                         outToClient.writeBytes("Content-Type: image/jpeg\r\n");
                    if (fileName.endsWith(".gif"))
                         outToClient.writeBytes("Content-Type: image/gif\r\n");
                    if (fileName.endsWith(".html"))
                         outToClient.writeBytes("Content-Type: text/html\r\n");
                    if (fileName.endsWith(".htm"))
                         outToClient.writeBytes("Content-Type: text/html\r\n");
                    outToClient.writeBytes("Content-Length: " + numOfBytes + "\r\n");
                    outToClient.writeBytes("\r\n");
                    /* Now send the actual data */
                    outToClient.write(fileInBytes, 0, numOfBytes);
                    socket.close();
               else
               System.out.println("Bad Request Message");
               todaysDate = new Date();
               try {
                    FileInputStream inlog = new FileInputStream("log.txt");
                    System.out.println(requestMessageLine + " " + todaysDate );
                    FileOutputStream log = new FileOutputStream("log.txt", true);
                    PrintStream myOutput = new PrintStream(log);
                    myOutput.println("FILE -> " + requestMessageLine + " DATE/TIME -> " + todaysDate);
               catch (IOException e) {
               System.out.println("Error -> " + e);
               System.exit(1);
socket.close();

import java.io.* ;
import java.net.* ;
import java.util.* ;
public final class MultiWebServer
public MultiWebServer(){
try{
// Set the port number.
int port=6789;
// Establish the listen socket.
String fileName;
ServerSocket listenSocket=new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while(true){
// Listen for a TCP connection request.
Socket connectionSocket=listenSocket.accept();
// Construct an object to process the HTTP request message.
HttpRequest request=new HttpRequest(connectionSocket);
// Create a new thread to process the request.
Thread thread=new Thread(request);
// Start the thread.
thread.start();
}catch(IOException ioe){
}catch(Exception e){
public static void main(String argv[]) throws Exception
new MultiWebServer();
final class HttpRequest implements Runnable
final static String CRLF = "\r\n";
Socket socket;
String requestMessageLine;
String fileName;
Date todaysDate;
// Constructor
public HttpRequest(Socket socket) throws Exception
this.socket = socket;
socket = null;
// Implement the run() method of the Runnable interface.
public void run()
try {
processRequest();
} catch (Exception e) {
System.out.println(e);
private void processRequest() throws Exception
// Get a reference to the socket's input and output streams.
//InputStream is = new InputStream(socket.getInputStream());
//DataOutputStream os = new DataOutputStream(socket.getOutputStream());
BufferedReader inFromClient =
new BufferedReader(new InputStreamReader(
socket.getInputStream()));
DataOutputStream outToClient =
new DataOutputStream(
socket.getOutputStream());
// Set up input stream filters.
requestMessageLine = inFromClient.readLine();
//BufferedReader br = null;
// Get the request line of the HTTP request message.
String requestLine = null;
// Display the request line.
System.out.println();
System.out.println(requestLine);
StringTokenizer tokenizedLine =
new StringTokenizer(requestMessageLine);
if (tokenizedLine.nextToken().equals("GET"))
fileName = tokenizedLine.nextToken();
if ( fileName.startsWith("/")==true )
fileName = fileName.substring(1);
File file = new File(fileName);
int numOfBytes = (int)file.length();
FileInputStream inFile = new FileInputStream(fileName);
byte[] fileInBytes = new byte[numOfBytes];
inFile.read(fileInBytes);
/* Send the HTTP header */
outToClient.writeBytes("HTTP/1.1 200 Document Follows\r\n");
if (fileName.endsWith(".jpg"))
outToClient.writeBytes("Content-Type: image/jpeg\r\n");
if (fileName.endsWith(".jpeg"))
outToClient.writeBytes("Content-Type: image/jpeg\r\n");
if (fileName.endsWith(".gif"))
outToClient.writeBytes("Content-Type: image/gif\r\n");
if (fileName.endsWith(".html"))
outToClient.writeBytes("Content-Type: text/html\r\n");
if (fileName.endsWith(".htm"))
outToClient.writeBytes("Content-Type: text/html\r\n");
outToClient.writeBytes("Content-Length: " + numOfBytes + "\r\n");
outToClient.writeBytes("\r\n");
/* Now send the actual data */
outToClient.write(fileInBytes, 0, numOfBytes);
socket.close();
else
System.out.println("Bad Request Message");
todaysDate = new Date();
try {
FileInputStream inlog = new FileInputStream("log.txt");
System.out.println(requestMessageLine + " " + todaysDate );
FileOutputStream log = new FileOutputStream("log.txt", true);
PrintStream myOutput = new PrintStream(log);
myOutput.println("FILE -> " + requestMessageLine + " DATE/TIME -> " + todaysDate);
catch (IOException e) {
System.out.println("Error -> " + e);
System.exit(1);
socket.close();

Runtime error in linking with static variables....

Hi,
I am building a shared library which includes a compiled object generated from a class containing the static variables only and also I have another version of same class with same & some new static variables in it and using that to generate another shared library. Now when I tried to run a program
which links with both the library it core dumps when it tries to return from the program i.e when it finishes.
Can someone please help me explain why my program is behaving like that?? Can duplicate inculsion of static variables in different scope can cause problem ?? How can this be avoided ?
Also please be advised that the class with static variables gets generated at the compile time using a script which uses a DTD whose version (specification) can be different in both the libraries therefore I can't just seperate the common stuff into one class and specific into another.
Thanks.
Rajeev.

Not to worry...found the answer in another post. Seems like patches need to applied to the OS.

Shared java static variables

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