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FULL PRODUCT VERSION :
java version "1.5.0_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_05-b05)
Java HotSpot(TM) Client VM (build 1.5.0_05-b05, mixed mode, sharing)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 5.2.3790]
EXTRA RELEVANT SYSTEM CONFIGURATION :
2.0GHz Pentium M processor
1GB physical memory
Internet Explorer 6.0.3790.1830
A DESCRIPTION OF THE PROBLEM :
When Java Plugin is configured with -Xmx parameter set to some number larger than half of the system's physical memory, java plugin will not start in Internet Explorer. It pops up a message box that says "The Java Runtime Environment cannot be loaded". On my machine, -Xmx750m does the trick. The problem seems to be independent of the version of Windows operating system. It's also reproducible on Windows 2000 and XP. It happens with both the <APPLET> tag and with the <OBJECT> tag.
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open Java 1.5 control panel and switch to Java tab. Open "Java Applet Runtime Settings" by clicking on "View" button. In the last field (Java Runtime Parameters) enter "-Xmx512m", where "512" should be replaced by 3/4 of the system physical memory size. Also enable "<APPLET> tag support" for Internet Explorer. Apply settings. Open internet explorer and navigate to any web page that contains an applet.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Applet runs and its user interface is visible.
ACTUAL -
The place where the Applet would be on the HTML page is blank with a little icon in top left corner, which represents missing control. An error message dialog is displayed by Java Plugin.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Error message box has the title "Java(TM) Plug-in Fatal Error", and the message is "The Java Runtime Environment cannot be loaded".
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
HTML page that calls up the applet.
-------------------------------------------------
<HTML>
<HEAD>
<TITLE>
Test Applet
</TITLE>
</HEAD>
<BODY>
<APPLET width=400 height=250>
<PARAM NAME="codebase" VALUE=".">
<PARAM NAME="code" VALUE="testapplet.TestApplet.class">
<PARAM NAME="name" VALUE="Test Applet">
</APPLET>
</BODY>
</HTML>
-------------------------------------------------
Even though the actual TestApplet.class doesn' t have to be available to see the problem, below is java code for this Applet.
-------------------------------------------------
package testapplet;
import java.applet.Applet;
import javax.swing.JLabel;
public class TestApplet extends Applet {
public TestApplet() {
add(new JLabel("Applet's Running"));
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Maximum possible value for -Xmx must be determined by trial and error for each individual machine.
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