FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing)
ADDITIONAL OS VERSION INFORMATION :
Linux mjirko 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 athlon i386 GNU/Linux
Microsoft Windows 2000 [Verze 5.00.2195]
A DESCRIPTION OF THE PROBLEM :
NameService resolving (calling ORB.resolve_initial_references("NameService")) in Apllet causes AccessControlException and deadlock (applet hangs).
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- run name service (on port 2809): tnameserv -ORBInitialPort 2809
- run test applet using appleviewer: appletviewer CorbaTest.html
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
NameSrvice should be resolved and message "Nameservice resolved." printed into System.out.
ACTUAL -
The applet hangs in ORB.resolve_initial_references().
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "Thread-2" java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThread)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at sun.applet.AppletSecurity.checkAccess(AppletSecurity.java:138)
at java.lang.Thread.checkAccess(Thread.java:1218)
at java.lang.Thread.setName(Thread.java:1001)
at com.sun.corba.se.impl.transport.SelectorImpl.run(SelectorImpl.java:239)
REPRODUCIBILITY :
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
<!-- FILE: CorbaTest.html -->
<HTML>
<HEAD>
<TITLE>CORBA Test</TITLE>
</HEAD>
<BODY>
<h1>CORBA Test</h1>
<hr>
<applet code="CorbaTest.class" width="400" height="250">
<param name="org.omg.CORBA.ORBInitialPort" value="2809"/>
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."
Your browser is completely ignoring the <APPLET> tag!
</applet>
</BODY>
</HTML>
/**
* FILE: CorbaTest.java
*/
import java.applet.Applet;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
public class CorbaTest extends Applet {
private ORB orb;
public void init() {
// create ORB
try {
orb = ORB.init(this, null);
//((com.sun.corba.se.spi.orb.ORB) orb).transportDebugFlag = true;
} catch(RuntimeException e) { }
}
public void start() {
if(orb==null) return;
// resolve NamingContext
try {
org.omg.CORBA.Object objRef = orb.resolve_initial_references("NameService");
NamingContext nc = NamingContextHelper.narrow(objRef);
System.out.println("NameService resolved.");
} catch(Exception e) { }
}
public void destroy() {
if(orb!=null) {
orb.shutdown(false);
orb = null;
}
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Grant "modifyThread" and "modifyThreadGroup" permissions to Applet.
Suggested fix supplied by community member ###@###.###:
A DESCRIPTION OF THE FIX :
Bug number : 6203567
Bug Description : NameService resolving in Applet causes AccessControlException and deadlock
Diff Baseline : Tiger b05
Diff :
--- com/sun/corba/se/impl/transport/SelectorImpl.java 2005-08-26 22:54:33.000000000 +0200
+++ com/sun/corba/se/impl/transport/SelectorImpl2.java 2005-11-10 10:23:42.000000000 +0100
@@ -236,7 +236,12 @@
public void run()
{
- setName("SelectorThread");
+ AccessController.doPrivileged(new PrivilegedAction() {
+ public Object run() {
+ setName("SelectorThread");
+ return null;
+ }
+ });
while (!closed) {
try {
int n = 0;
FIX FOR BUG NUMBER:
6203567
Test case supplied by community member ###@###.###:
Hello,
here is a little test case for the fix. Steps to use this test case:
1) compile CorbaInAppletTest.java
2) run name service (on port 2809): tnameserv -ORBInitialPort 2809
3) run the test applet using appleviewer: appletviewer
CorbaInAppletTest.html
If the bug is present, the exception message is printed out and the
apllet hangs in ORB.resolve_initial_references().
If the bug is corrected, NameSrvice should be resolved and message
"Nameservice resolved." printed into System.out.
Refer to the attached files for CorbaInAppletTest.java and CorbaInAppletTest.html
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Java