JDK-5026942 : rmi srv in applet throws IllegalStateException when returns remote obj
- Type: Bug
- Component: core-libs
- Sub-Component: java.rmi
- Affected Version: 1.4.2,6
- Priority: P3
- Status: Resolved
- Resolution: Fixed
- OS: windows_2000,windows_xp
- CPU: x86
- Submitted: 2004-04-05
- Updated: 2005-09-20
- Resolved: 2005-09-20
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Resolved: Release in which this issue/RFE has been resolved.
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 6 |
|---|
6 betaFixed  |
Related Reports
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Relates :
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Description
Name: gm110360 Date: 04/05/2004
FULL PRODUCT VERSION :
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)
ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]
A DESCRIPTION OF THE PROBLEM :
When an applet starts a RMI server and then reloaded, IllegalStateException is thrown on server side when the RMI server returns new remote object.
Thereafter, client frequently gets UnmarshallException / IOException when using remote object returned by rmi server. Sometimes, the client also rceives NoSuchObjectException.
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. run build.bat to build the attached source files
2. put everything in a web server
3. visit the page TestApplet.html from a browser
4. run TestHello
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
say hello!
get hello
...
ACTUAL -
say hello!
get hello
[.. refresh browser here ..]
say hello!
get hello
say Failed: no such object in table
java.rmi.NoSuchObjectException: no such object in table
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Stream
RemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:
223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
at HelloImpl_Stub.sayHello(Unknown Source)
at TestHello.main(TestHello.java:11)
REPRODUCIBILITY :
This bug can be reproduced often.
---------- BEGIN SOURCE ----------
File list:
------------
build.bat
GetHello.java
Hello.java
TestApplet.html
TEstApplet.java
TestHello.java
build.bat
-----------
javac *.java
rmic GetHelloImpl
rmic HelloImpl
GetHello.java
-----------
public interface GetHello extends java.rmi.Remote {
public Hello getHello () throws java.rmi.RemoteException;
}
Hello.java
-----------
public interface Hello extends java.rmi.Remote {
public String sayHello () throws java.rmi.RemoteException;
}
TestApplet.html
-----------
<html>
<body>
<applet code="TestApplet.class" codebase="." width="2" height="2">
</applet>
</body>
</html>
TestHello.java
----------------
import java.rmi.*;
import java.security.*;
public class TestHello {
public static void main (String [] args) {
try {
GetHello gh = GetHelloFactory.getGetHello();
Hello h = null;
while (true) {
System.out.println ("get hello");
h=gh.getHello();
System.out.print ("say ");
System.out.println (h.sayHello());
}
} catch (Exception e)
{
System.out.println ("Failed: "+ e.getMessage());
e.printStackTrace();
}
}
}
class GetHelloFactory {
public static GetHello getGetHello ()
throws Exception {
return (GetHello)Naming.lookup(GetHello.class.getName());
}
}
TEstApplet.java
-----------
import java.applet.*;
import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.RemoteException;
import java.rmi.server.*;
public class TestApplet extends Applet implements Remote {
public void init() {
Registry reg = null;
try {
reg = LocateRegistry.createRegistry(1099);
} catch (RemoteException e) {}
try {
if (reg == null) reg = LocateRegistry.getRegistry(1099); Naming.rebind(GetHello.class.getName(), new GetHelloImpl());
} catch (Exception e)
{
System.out.println ("Failed: "+ e.getMessage());
e.printStackTrace();
}
}
public static void main (String [] args)
{
Applet applet=new TestApplet();
applet.init();
}
}
class GetHelloImpl extends java.rmi.server.UnicastRemoteObject implements GetHello {
public GetHelloImpl () throws java.rmi.RemoteException { super(); }
public Hello getHello () throws java.rmi.RemoteException {
return (Hello) new HelloImpl();
}
}
class HelloImpl extends java.rmi.server.UnicastRemoteObject implements Hello {
public HelloImpl () throws java.rmi.RemoteException { super(); }
public String sayHello () throws java.rmi.RemoteException {
return "hello!";
}
}
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
Launch a JVM using Runtime.exec() and run the rmi server from it
(Incident Review ID: 245860)
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