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Duplicate :
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Name: gm110360 Date: 05/12/2004
FULL PRODUCT VERSION :
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)
ADDITIONAL OS VERSION INFORMATION :
windows xp
5.1 (Build 2600 xpsp2)
EXTRA RELEVANT SYSTEM CONFIGURATION :
internet explorer version
6.0.2800.1106.xpsp2.030422-1633
A DESCRIPTION OF THE PROBLEM :
if a java call is made to javascript via liveconnect, and the liveconnect calls back into java, a further outgoing call will cause internet explorer to freeze in some cases. Normally, reentrant calls work fine, but if you do a lot very quickly, the bug occurs. Funnily enough, right mouse clicking on the internet explorer button in the taskbar frees it up, until the next block.
The code example I provide here causes the lock in a completely reproducable fashion, at least on my machine.
REGRESSION: This worked a lot better under 1.4.2_03
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
double click on the test.html file
observe lock
right mouse click to free it up until next lock. Observe the output in the java console.
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
it should not lock
ACTUAL -
it locks
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
************************************
TestApplet.java:
************************************
import javax.swing.JApplet;
import netscape.javascript.JSObject;
public class TestApplet extends JApplet
{
public void start()
{
for (int i = 0; i < 100; i++)
{
JSObject.getWindow(TestApplet.this).call("enterJavascript", new Object[0]);
}
}
public void enterJava()
{
System.out.println("here");
JSObject.getWindow(TestApplet.this).call("reenterJavascript", new Object[]{"TEST"});
}
}
************************************
test.html:
************************************
<HTML>
<HEAD>
<SCRIPT TYPE="text/javascript" language="JavaScript">
function reenterJavascript(s)
{
window.document.body.all.test.innerHTML=s;
}
function enterJavascript()
{
window.document.body.all.coreApplet.enterJava();
}
</SCRIPT>
</HEAD>
<BODY>
<OBJECT ID="coreApplet" classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" codebase = "http://java.sun.com/products/plugin/autodl/jinstall-1_4_2-windows-i586.cab#Version=1,4,2,0" WIDTH = "0" HEIGHT = "0" >
<PARAM NAME="name" VALUE="coreApplet"></PARAM>
<PARAM NAME="CODE" VALUE = "TestApplet.class" ></PARAM>
<PARAM NAME="type" VALUE = "application/x-java-applet;jpi-version=1.4.2"></PARAM>
</OBJECT>
<div id="test"></div>
</BODY>
</HTML>
---------- END SOURCE ----------
(Incident Review ID: 261506)
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###@###.### 10/18/04 20:10 GMT