Bugs item #562972, was opened at 2002-05-31 09:30
You can respond by visiting:
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Category: JBossServer
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 8
Submitted By: Marius Kotsbak (mkotsbak)
Assigned to: Nobody/Anonymous (nobody)
Summary: Error in PortableRemoteObject.narrow()
Initial Comment:
18:30:30,517 ERROR [STDERR] java.lang.ClassCastException
18:30:30,518 ERROR [STDERR] at
com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293)
18:30:30,519 ERROR [STDERR] at
javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134)
When running narrow after lookup from a servlet.
----------------------------------------------------------------------
Comment By: Nobody/Anonymous (nobody)
Date: 2002-08-09 08:33
Message:
Logged In: NO
This bug is killing my development efforts, but it doesn't look like JBoss fault, but
rather the VM's. First a few
investigative notes. This ClassCastException happens on both remote and local
interfaces using
PortableRemoteObject and without. PortableRemoteObject has nothing to do with this
bug. If some investigative
code is put in like this in the setSessionContext:
Context ctx = new InitialContext();
Object obj = ctx.lookup("local/BeanAHome");
Class[] c = obj.getClass().getInterfaces();
System.out.println(obj.getClass().getSuperclass().getName());
for (int i=0; i<c.length; i++) {
System.out.println(c[i].getName());
}
BeanAHome home = (BeanAHome)obj;
We find the following out. First, as expected, obj is of java.lang.reflect.Proxy
class. Next we check to see what
interfaces it implements. The output show com.mycompany.BeanAHome as an implemented
interface in the
Proxy. However, when a cast is made to this object an exception occurs. This makes
no sense because
reflection shows it implements the desired interface.
I have looked at Sun's bug parade have not found anything like this. I however didn't
look to hard at it. There is a
chance that JBoss could be responsible for this bug, but I don't feel like searching
in the code and my next project
is on Oracle 9iAS. If I get some more time, I will look into this more.
A good test would be to download java 1.3 and see if the bug goes away. My guess is
that is does.
Matt
----------------------------------------------------------------------
Comment By: Nobody/Anonymous (nobody)
Date: 2002-08-09 08:30
Message:
Logged In: NO
This bug is killing my development efforts, but it doesn't look like JBoss fault, but
rather the VM's. First a few
investigative notes. This ClassCastException happens on both remote and local
interfaces using
PortableRemoteObject and without. PortableRemoteObject has nothing to do with this
bug. If some investigative
code is put in like this in the setSessionContext:
Context ctx = new InitialContext();
Object obj = ctx.lookup("local/BeanAHome");
Class[] c = obj.getClass().getInterfaces();
System.out.println(obj.getClass().getSuperclass().getName());
for (int i=0; i<c.length; i++) {
System.out.println(c[i].getName());
}
BeanAHome home = (BeanAHome)obj;
We find the following out. First, as expected, obj is of java.lang.reflect.Proxy
class. Next we check to see what
interfaces it implements. The output show com.mycompany.BeanAHome as an implemented
interface in the
Proxy. However, when a cast is made to this object an exception occurs. This makes
no sense because
reflection shows it implements the desired interface.
I have looked at Sun's bug parade have not found anything like this. I however didn't
look to hard at it. There is a
chance that JBoss could be responsible for this bug, but I don't feel like searching
in the code and my next project
is on Oracle 9iAS. If I get some more time, I will look into this more.
A good test would be to download java 1.3 and see if the bug goes away. My guess is
that is does.
Matt
----------------------------------------------------------------------
Comment By: Brian Topping (topping)
Date: 2002-07-21 16:23
Message:
Logged In: YES
user_id=99236
See 584663. Couldn't attach a file here.
HTH
----------------------------------------------------------------------
Comment By: Scott M Stark (starksm)
Date: 2002-07-21 16:13
Message:
Logged In: YES
user_id=175228
Many of our unit tests make use of
PortableRemoteObject.narrow without any problems so post
a testcase that demonstrates this if you want to get this
resoved.
----------------------------------------------------------------------
Comment By: Brian Topping (topping)
Date: 2002-07-20 01:10
Message:
Logged In: YES
user_id=99236
Okay, this is curious:
I've been setting up JUnit, trying to localize this bug, figuring
it's something to do with my code. Nothing but
ClassCastException, over and over again.
Then I turned *off* the "Reload classes every run" option on
the JUnit GUI. Suddenly my test passes. I can run the test
multiple times, turn on the switch, down it goes,
ClassCastException. Ad nauseum, no differences from the
script. I can reproduce this 100%.
I'm not familiar with the what this switch does, but it might be
a clue into this bug.
----------------------------------------------------------------------
Comment By: Brian Topping (topping)
Date: 2002-07-19 19:04
Message:
Logged In: YES
user_id=99236
By the way, I've tested this with only a single copy of the ejb
jar (or anything that would contain the interfaces) in deploy,
the tmp and work directories blown away, and confirmed that
the remote interfaces work properly from a web container
client.
This shouldn't be this hard, FWIW it's definitely got everything
here at a standstill.
----------------------------------------------------------------------
Comment By: Brian Topping (topping)
Date: 2002-07-19 17:58
Message:
Logged In: YES
user_id=99236
I'm having this problem as well, here is my test code:
Properties params = new Properties();
params.put
(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.Na
mingContextFactory");
params.put(Context.PROVIDER_URL, "localhost");
params.put
(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.int
erfaces" );
InitialContext initialContext = new InitialContext(params);
try {
java.lang.Object objRef = initialContext.lookup
(com.bill2.ejb.CustomerHome.JNDI_NAME);
return (com.bill2.ejb.CustomerHome)
PortableRemoteObject.narrow(objRef,
com.bill2.ejb.CustomerHome.class);
} finally {
initialContext.close();
}
----------------------------------------------------------------------
Comment By: Kenny Smith (subsstuff1)
Date: 2002-06-04 15:06
Message:
Logged In: YES
user_id=548391
hell no spoke to soon - problem still exists, disguised as a
different exception:
----
00:03:26,130 ERROR [STDERR]
java.lang.ClassCastException
00:03:26,130 ERROR [STDERR] at
com.sun.corba.se.internal.javax.rmi.PortableR
emoteObject.narrow(PortableRemoteObject.java:293)
00:03:26,140 ERROR [STDERR] at
javax.rmi.PortableRemoteObject.narrow(Portabl
eRemoteObject.java:134)
00:03:26,150 ERROR [STDERR] at
com.foo.account.AccountUtil.getHome(Unknown Source)
00:03:26,160 ERROR [STDERR] at
com.foo.account.AccountRegistryBean.createAccount
(Unknown Source)
00:03:26,170 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(
Native Method)
00:03:26,180 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(N
ativeMethodAccessorImpl.java:39)
00:03:26,190 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invo
ke(DelegatingMethodAccessorImpl.java:25)
00:03:26,200 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:3
24)
00:03:26,210 ERROR [STDERR] at
org.jboss.ejb.StatelessSessionContainer$Conta
inerInterceptor.invoke(StatelessSessionContainer.java:664)
00:03:26,220 ERROR [STDERR] at
org.jboss.resource.connectionmanager.CachedCo
nnectionInterceptor.invoke
(CachedConnectionInterceptor.java:186)
00:03:26,230 ERROR [STDERR] at
org.jboss.ejb.plugins.StatelessSessionInstanc
eInterceptor.invoke
(StatelessSessionInstanceInterceptor.java:77)
00:03:26,240 ERROR [STDERR] at
org.jboss.ejb.plugins.AbstractTxInterceptor.i
nvokeNext(AbstractTxInterceptor.java:96)
00:03:26,250 ERROR [STDERR] at
org.jboss.ejb.plugins.TxInterceptorCMT.runWit
hTransactions(TxInterceptorCMT.java:167)
00:03:26,260 ERROR [STDERR] at
org.jboss.ejb.plugins.TxInterceptorCMT.invoke
(TxInterceptorCMT.java:61)
00:03:26,270 ERROR [STDERR] at
org.jboss.ejb.plugins.SecurityInterceptor.inv
oke(SecurityInterceptor.java:129)
00:03:26,280 ERROR [STDERR] at
org.jboss.ejb.plugins.LogInterceptor.invoke(L
ogInterceptor.java:166)
00:03:26,300 ERROR [STDERR] at
org.jboss.ejb.StatelessSessionContainer.invok
e(StatelessSessionContainer.java:313)
00:03:26,310 ERROR [STDERR] at
org.jboss.ejb.Container.invoke(Container.java
:705)
00:03:26,320 ERROR [STDERR] at
org.jboss.mx.server.MBeanServerImpl.invoke(MB
eanServerImpl.java:491)
00:03:26,330 ERROR [STDERR] at
org.jboss.invocation.jrmp.server.JRMPInvoker.
invoke(JRMPInvoker.java:362)
00:03:26,340 ERROR [STDERR] at
sun.reflect.GeneratedMethodAccessor30.invoke(
Unknown Source)
00:03:26,350 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invo
ke(DelegatingMethodAccessorImpl.java:25)
00:03:26,360 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:3
24)
00:03:26,370 ERROR [STDERR] at
sun.rmi.server.UnicastServerRef.dispatch(Unic
astServerRef.java:261)
00:03:26,380 ERROR [STDERR] at
sun.rmi.transport.Transport$1.run(Transport.j
ava:148)
00:03:26,390 ERROR [STDERR] at
java.security.AccessController.doPrivileged(N
ative Method)
00:03:26,390 ERROR [STDERR] at
sun.rmi.transport.Transport.serviceCall(Trans
port.java:144)
00:03:26,400 ERROR [STDERR] at
sun.rmi.transport.tcp.TCPTransport.handleMess
ages(TCPTransport.java:460)
00:03:26,410 ERROR [STDERR] at
sun.rmi.transport.tcp.TCPTransport$Connection
Handler.run(TCPTransport.java:701)
00:03:26,440 ERROR [STDERR] at java.lang.Thread.run
(Thread.java:536)
----------------------------------------------------------------------
Comment By: Kenny Smith (subsstuff1)
Date: 2002-06-04 14:36
Message:
Logged In: YES
user_id=548391
just installed JBoss 3.0.0 (2002.05.31) - problem gone
----------------------------------------------------------------------
Comment By: Kenny Smith (subsstuff1)
Date: 2002-06-04 08:55
Message:
Logged In: YES
user_id=548391
samew problem here and Im using a session bean
same as the
--- [ jboss-Bugs-563120 ] ClassCastException after
redeploy
bug
----------------------------------------------------------------------
Comment By: Christian Riege (lqd)
Date: 2002-05-31 11:44
Message:
Logged In: YES
user_id=176671
can you pls. attach a simple testcase for this?
----------------------------------------------------------------------
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https://sourceforge.net/tracker/?func=detail&atid=376685&aid=562972&group_id=22866
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