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Type: Bug
Resolution: Duplicate
Priority: P3
Fix Version/s: None
Affects Version/s: 1.1.1
Component/s: client-libs
Labels:
- HTML
- Japanese
- Java
- Plug-in
- performance

Subcomponent:
java.awt
CPU:

sparc
OS:

solaris_2.5.1

chosho.kyo@japan 1998-09-05

(1) Working environments
OS : Solaris2.5.1 Japanese version
Browser : Netscape Communicator4.04J
Java Plug-in : Java Plug-in 1.1.1 g
JRE : JRE1.1.6 within Plug-in
Window : CDE
Japanese Input : Atok7

(2) Phenomenon
Step1: Start NC with Java Plug-in.
Step2: Read a html file with applet.
Step3: Read another html file with another applet.
Step4: Repeat Step3 over and over to read other html with different applet.
       The memory size of Java VM increases without any limitation.
       Sometimes netscape will show a dialog window
       say:[Plugin: Java VM process has died.].

I have got the new test programs for reproducing BugId:4171490
from Ntt Comware.
Please check them.

(1) Working environments
OS : Solaris2.5.1 Japanese version
Browser : Netscape Communicator4.04J
Java Plug-in : Java Plug-in 1.1.1 g
JRE : JRE1.1.6 within Plug-in
Window : CDE
Japanese Input : Atok7

(2) Test steps

[Step1] Compile F1main.java and F2main.java
[Step2] Build a environment to run both applets above.
        Assume there is a WWW environment called
        http://speed.japan/~kyo/ and make directories
        as follows.

        $mkdir test
        $cd test
        $mkdir Frame2

        Put F1main.class, F1Thread.class and all HTML files
        under the directory test.
        Put F2main.class under the directory test/F2main.

[Step3] Read http://speed.japan/~kyo/test/sample.html
        The above address is a real one, you can access it directly.

[Step4] Two frames appear and then you can test it.
        Click start button on the upper frame, then a lower frame
        will be reloaded automaticlly until you click the stop button
        of the upper frame.

[Step5] Observe the growth of the memory state like following.

        $ps -u username -o pmem,fname | grep java_vm

        You will find the memory of the java_vm grows indefinitely.

/*----------F1main.java-----------*/
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;

public class F1main extends Applet implements ActionListener{
public Label tf = null;
private F1Thread f1Thread;
private Button startButton;
private Button stopButton;

public void init(){

setLayout(new GridLayout(4,1));

// Create Version Label
add(new Label("Auto HTML read program ver 1.0"));

// Create Counter Fileld
tf = new Label();
add(tf);

// Create Start Button
startButton = new Button("start");
startButton.addActionListener(this);
add(startButton);

//Create StopButton
stopButton = new Button("stop");
stopButton.addActionListener(this);
stopButton.setEnabled(false);
add(stopButton);

}

public void actionPerformed(ActionEvent e){
if(e.getSource() == startButton){
startButton.setEnabled(false);
stopButton.setEnabled(true);
f1Thread = new F1Thread( this, tf );
}
if(e.getSource() == stopButton){
startButton.setEnabled(true);
stopButton.setEnabled(false);
f1Thread.stop();
}
}
}

class F1Thread extends Thread{
private Label setl = null;
private String http = null;
private Applet parent = null;
static final private String htmlFile = "F2main.html";

public F1Thread(Applet parent, Label tf){

URL url;
String host;
String base;
int pos;

this.setl = tf;
this.parent = parent;

// Create URL Address
url = parent.getDocumentBase();
host = url.getHost();
base = url.getFile();
base = base.substring(0,base.lastIndexOf("/")+1);
http = "http://";
http += host;
http += base;
http += htmlFile;

this.start();
}

public void run(){
for(int i=0;;i++){
try{
parent.getAppletContext().showDocument(new URL(http), "FRAME2");
this.setl.setText(Integer.toString(i));
sleep(5000);
}
catch(Exception e){
System.out.println("F1Thread " + e.toString());
return;
}

}
}
}

/*----------F2main.java-----------*/
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class F2main extends Applet{
public void init(){
setLayout(new GridLayout());
Label label = new Label("This is F2main.");
add(label);

}
}

------------F1main.html-------------
<HTML>


<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 400 HEIGHT = 100
codebase="http://java.sun.com/products/plugin/1.1/jinstall-11-win32.cab#Ver
sion=1,1,0,0">
<PARAM NAME = CODE VALUE = F1main.class >

<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.1" java_CODE = F1main.class
WIDTH = 400 HEIGHT = 100
  pluginspage="http://java.sun.com/products/plugin/1.1/plugin-install.html">
<NOEMBED></COMMENT>

</NOEMBED></EMBED>
</OBJECT>




</HTML>

------------F2main.html-------------
<HTML>


<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 400 HEIGHT = 100
codebase="http://java.sun.com/products/plugin/1.1/jinstall-11-win32.cab#Ver
sion=1,1,0,0">
<PARAM NAME = CODE VALUE = F2main.class >
<PARAM NAME = CODEBASE VALUE = "Frame2" >

<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.1" java_CODE = F2main.class
java_CODEBASE = "Frame2" WIDTH = 400 HEIGHT = 100
  pluginspage="http://java.sun.com/products/plugin/1.1/plugin-install.html">
<NOEMBED></COMMENT>

</NOEMBED></EMBED>
</OBJECT>




</HTML>

------------sample.html-------------
<HTML>
    <HEAD>
        <TITLE>Applet Reload test</TITLE>
    </HEAD>
    <FRAMESET ROWS="50%,50%">
        <FRAME SRC="F1main.html" NAME="FRAME1">
        <FRAME SRC="F2main.html" NAME="FRAME2">

    </FRAMESET>
</HTML>

chosho.kyo@japan 1998-09-10

duplicates

JDK-4190698 jdk1.1.8 needs to have latest libXm.so.3 patch to prevent memory leak

Closed

relates to

JDK-4171483 Reload button not properly supported by plugin

Resolved

JDK-4239717 Reloading applet causes memory leak in plugin 1.2... still

Resolved

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