Thread (won't run on multiple CPUs)

I have read articles that claim java's threads will only run on one CPU no matter how many CPUs your system has. But most of those articles were of old versions of java, but I have mostly dual and some quad CPU machines running Linux and I tested out the latest version of the jdk (1.5) and have soem disappointing results. When I look at the CPU usage while I run multithreaded apps it seems there is always one that is over worked, and I think the other CPUs are just doing OS stuff not java stuff. I then did some tests looking at run times which should be almost linear as I increase my thread count (as long as I keep it under the number of CPUs), so on my quad CPU machines I should 2 threads better than one and 3 threads better than 2 and 4 threads should be my peek performance. The machines I tested were completly idle, and I had the exact same run times for all the runs even a little worse as the numbe of threads was increased. So it looks at though the threads aren't utilizing the multiple CPUs. I then made my program run in seperate threads and there was a linear increase, so there is definatly something wrong with the jdk and threading (on SMP machines) as far as I can tell... Anyone else have input?

I ran your code on a linux box running debian 3.0 with FOUR 750MHz processors:
Runtime 771 ms, rate=2594033 rand()/sec
Runtime 1445 ms, rate=2768166 rand()/sec
Runtime 1546 ms, rate=5174644 rand()/sec
$ uname -a
Linux shell 2.4.27-undaero #3 SMP Fri Sep 3 17:35:56 CDT 2004 i686 unknown
$ java -version
java version "1.4.2_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_01-b06)
Java HotSpot(TM) Client VM (build 1.4.2_01-b06, mixed mode)
$
I ran your code on a Sun sparc with FOUR 450MHz processors:
Solaris 9 12/02 s9s_u2wos_10 SPARC
Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
Use is subject to license terms.
Assembled 05 November 2002
Runtime 1252 ms, rate=1597444 rand()/sec
Runtime 2545 ms, rate=1571709 rand()/sec
Runtime 1843 ms, rate=4340748 rand()/sec
agassiz% uname -a
SunOS agassiz 5.9 Generic_117171-11 sun4u sparc SUNW,Ultra-4
agassiz% java -version
java version "1.4.0_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_03-b04)
Java HotSpot(TM) Client VM (build 1.4.0_03-b04, mixed mode)
agassiz%
I ran your code on a Red Hat Linux release 8.0 (Psyche) wit DUAL Pentium Xeon 2.4 GHz
Runtime 476 ms, rate=4201680 rand()/sec
Runtime 742 ms, rate=5390835 rand()/sec
Runtime 758 ms, rate=10554089 rand()/sec
podollb@Node5 ~>uname -a
Linux Node5 2.4.18-14smp #1 SMP Wed Sep 4 12:34:47 EDT 2002 i686 i686 i386 GNU/Linux
podollb@Node5 ~>java -version
java version "1.5.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-rc-b63)
Java HotSpot(TM) Client VM (build 1.5.0-rc-b63, mixed mode)
I ran your code on a SINGLE cpu Linux box running Slackware 9.1.0 with 333MHz Pentium II
Runtime 1018 ms, rate=1964636 rand()/sec
Runtime 2009 ms, rate=1991040 rand()/sec
Runtime 4010 ms, rate=1995012 rand()/sec
podollb@vectra ~>uname -a
Linux vectra 2.4.22 #6 Tue Sep 2 17:43:01 PDT 2003 i686 unknown unknown GNU/Linux
podollb@vectra ~>java -version
java version "1.5.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-rc-b63)
Java HotSpot(TM) Client VM (build 1.5.0-rc-b63, mixed mode)
I ran your code on a SINGLE CPU machine running Red Hat Linux release 9 (Shrike) 1.69GHz
Runtime 714 ms, rate=2801120 rand()/sec
Runtime 1416 ms, rate=2824858 rand()/sec
Runtime 2823 ms, rate=2833864 rand()/sec
podollb@equus ~>uname -a
Linux equus 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003 i686 i686 i386 GNU/Linux
podollb@equus ~>java -version
java version "1.4.2_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_01-b06)
Java HotSpot(TM) Client VM (build 1.4.2_01-b06, mixed mode)
I ran your code on a Fedora Core release 1 (Yarrow) with DUAL 1.66 AMD Athlon
Runtime 298 ms, rate=6711409 rand()/sec
Runtime 837 ms, rate=4778972 rand()/sec
Runtime 815 ms, rate=9815950 rand()/sec
podollb@zeus_master ~>uname -a
Linux zeus_master 2.4.22-1.2199.nptlsmp #1 SMP Wed Aug 4 11:49:01 EDT 2004 i686 athlon i386 GNU/Linux
podollb@zeus_master ~>java -version
java version "1.4.2_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_02-b03)
Java HotSpot(TM) Client VM (build 1.4.2_02-b03, mixed mode)
I ran your code on a DUAL 2.8GHz Pentium Xeon running Red Hat Enterprise Linux AS release 3 (Taroon Update 2)
Runtime 485 ms, rate=4123711 rand()/sec
Runtime 451 ms, rate=8869179 rand()/sec
Runtime 484 ms, rate=16528925 rand()/sec
podollb@crayowulf ~>uname -a
Linux crayowulf 2.4.21-15.ELsmp #1 SMP Thu Apr 22 00:18:24 EDT 2004 i686 i686 i386 GNU/Linux
podollb@crayowulf ~>java -version
java version "1.5.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-rc-b63)
Java HotSpot(TM) Server VM (build 1.5.0-rc-b63, mixed mode)
I ran your code on a DUAL pentium xeon 1.69GHz
Runtime 678 ms, rate=2949852 rand()/sec
Runtime 1197 ms, rate=3341687 rand()/sec
Runtime 1773 ms, rate=4512126 rand()/sec
podollb@tycho ~>uname -a
Linux tycho.rwic.und.edu 2.4.18-24.7.xsmp #1 SMP Fri Jan 31 06:10:55 EST 2003 i686 unknown
podollb@tycho ~>java -version
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build Blackdown-1.4.1-beta)
Java HotSpot(TM) Client VM (build Blackdown-1.4.1-beta, mixed mode)

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MOVED: Won't run with 2 CPUs

This topic has been moved to Server/workstation.
Won't run with 2 CPUs

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Enhance Electronics
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The 4 pin connector is plugged in. =) I did not overlook that.
As for trying it with fewer memory sticks, no I have not tried that but keep in mind that earlier today the previous mobo was in this machine and running with both CPUs and all 3 memory sticks (512, 512, 1024). All in the same memory slots as the original mobo. I pulled each one and inserted it in the new mobo before taking out the next one to be sure I put them back in the same slot.
I checked and double checked all the bios settings and they match. The only thing that has changed since this morning is the replacement mobo and that is the exact same model as the one I replaced. System works fine with 1 CPU but not with 2. What might cause that on this motherboard but not the original one?

Won't run with 2 CPUs

I just replaced my 6501 motherboard with one that MSI sent me. When I install both processors the computer most times hangs at startup screen. Lights 2 and 3 are red which indicates it stops at the Bios sign-on.
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If I remove the second CPU and reboot the machine boots fine and I can load up windows.
I have swapped both CPUs and put both of them in the Primary CPU slot and they both boot up and run fine no issues. Only when I try to have both in do I have problems. The reason I replaced the MB was because of some dried out capacitors. I got the 1.91 bios update already. Not sure what might be causing this but I want both CPUs working like before. Any help would be appreciated.
This is the first time this board has been used. I pulled it out of the box this morning. It is a refurbished board from MSI. The other board with the dried out capacitors ran both CPUs fine without issue but I had data transfer issues so had to replace it. The newest bios available for this motherboard appears to be award bios v1.91 which is the one I have.
If any further info is needed let me know what else you need. (I am on the computer having troubles right now but with only 1 CPU running - works fine albeit a bit slower)

Okay. Power supply info. Had to break my system down because the side that had the info on it was covered by the top of the tower.
Enhance Electronics
Model: ATX-1140F with Outlet
400 Watt Power Supply
+3.3v(28A), +5V(38A), +12V(18A), -12V(.8A), -5V(.5A), +5VSB(2A)
The 4 pin connector is plugged in. =) I did not overlook that.
As for trying it with fewer memory sticks, no I have not tried that but keep in mind that earlier today the previous mobo was in this machine and running with both CPUs and all 3 memory sticks (512, 512, 1024). All in the same memory slots as the original mobo. I pulled each one and inserted it in the new mobo before taking out the next one to be sure I put them back in the same slot.
I checked and double checked all the bios settings and they match. The only thing that has changed since this morning is the replacement mobo and that is the exact same model as the one I replaced. System works fine with 1 CPU but not with 2. What might cause that on this motherboard but not the original one?

Thread won't run

in my program i want a thread name getdata to start, but it does not. if it did a statement in system would say so. Any help in getting the thread to run would be great thanks. Here is the code:
public void listenSocket() {
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I believe you really have to read the API about Thread this is not the way at all how you can create a new Thread.
Thread getdata = new Thread();
getdata.start();Create a new Thread object with itself as its underlying Runnable. Therefore when you start it, it process the run() method of Thread class which is empty. You must create a class which extends Thread and overload its run method instead or create a class that implements Runnable and create the new Thread with:
Thread t = new Thread(myRunnable);
t.start();

Thread won't run in release mode

My application runs fine in Debug mode. I have several threads. A couple just blink some LEDS. In release mode they don't blink and my main function that is triggered by a button which runs a callback function that launches another thread doesn't work.

Hello,
it's difficult to try guessing what's happening with no informations available. Apparently ther's something that's causing a program crash in release mode and you suppose it relates to some problem in memory allocation. Additionally, it seems your program is consuming system resources until it fills up all available memory.
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Additionally, have you a consistent and robust error checking method that logs all errors found to the user interface or to disk?
Another hint if you have CVI2009+ can be to activate extended debugging level in Build Options, next run the program some time in debug mode and close it: if some resources are not properly freed the Resource tracking window should appear with all allocated resources listed that are not correctly freed by the code.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

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Using JDK 1.4.1 on a Windows 2000 box
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public class ThreadTest
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I found the following information in "Concurrent Programming in Java" 2nd Edition, by Doug Lea.
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I did not find any such information in Sun's documentation.
Apparently a thread pool implementation relies on threads that never "finish". That is the thread object never exits the run() method, but employs a mechanism by which it accepts new tasks, executes them. When the task completes, the thread's run() method loops and waits for a new task. run() is never exited.

Safari won't run on multiple 2013 Macbook Airs

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☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter the name of the crashed application or process in the Filter text field. Select the messages from the time of the last crash, if any. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V).
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
Still in the Console window, look under User Diagnostic Reports for crash reports related to the process. The report name starts with the name of the crashed process, and ends with ".crash". Select the most recent report and post the entire contents — again, the text, not a screenshot. In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

How do you disable "Run with Multiple Threads" in a standalone EXE

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Greg McKaskle once posted that using a non-reentrant (VI is NOT re-entrant) wrapper VI to make the calls to the dll will prevent simultaneous execution of the dll.
Ben
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<applet width="400" height="525" code="musicapplet.class" archive="crypticgraffiti.jar">
<param name="bgcolor" value="ffffff"> <param name="fontcolor" value="000000">
</param> </param> Your browser is not Java enabled. </applet>
Here is the structure of the jar file's contents:
META-INF/
META-INF/MANIFEST.MF
com/
com/crypticgraffiti/
com/crypticgraffiti/music/musicapplet
com/crypticgraffiti/music/GetNotes.class
com/crypticgraffiti/music/InstList.class
com/crypticgraffiti/music/Mode.class
com/crypticgraffiti/music/MusicCreator.class
com/crypticgraffiti/music/OctaveTransformer.class
com/crypticgraffiti/music/Phrase.class
musicapplet/MusicApplet$playerThread.class
musicapplet/MusicApplet.class
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load: class musicapplet.class not found.
java.lang.ClassNotFoundException: musicapplet.class
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     at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
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Cryptic Graffiti wrote:
Here is the structure of the jar file's contents:
META-INF/
META-INF/MANIFEST.MF
com/
com/crypticgraffiti/
com/crypticgraffiti/music/musicapplet
com/crypticgraffiti/music/GetNotes.class
com/crypticgraffiti/music/InstList.class
com/crypticgraffiti/music/Mode.class
com/crypticgraffiti/music/MusicCreator.class
com/crypticgraffiti/music/OctaveTransformer.class
com/crypticgraffiti/music/Phrase.class
musicapplet/MusicApplet$playerThread.class
musicapplet/MusicApplet.class
(Musicapplet.class is the main class)
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<applet width=400 height=525 code=musicapplet.MusicApplet archive="crypticgraffiti.jar">
</applet>
The JAR should be in the same directory as your HTML file. While launching from command line, you can also check if your JAR file is getting included in classpath.
Thanks,
Nitin

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This forum is focused on consumer level products. For the Designjet you may have better results posting in the HP Designjet forum here.
Bob Headrick, HP Expert
I am not an employee of HP, I am a volunteer posting here on my own time.
If your problem is solved please click the "Accept as Solution" button ------------V
If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

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s com.sun.faces.config.ConfigureListener
javax.faces.FacesException: Can't parse configuration file:jar:file:/var/jakarta-tomcat-4.1.29/work/Standalone/localhost/Face
sTemplate/WEB-INF/lib/jsf-impl.jar!/com/sun/faces/jsf-ri-runtime.xml
at com.sun.faces.config.ConfigureListener.parse(ConfigureListener.java:1204)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:274)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3271)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3613)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:700)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:252)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1567)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:385)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:819)
at org.apache.catalina.servlets.ManagerServlet.deploy(ManagerServlet.java:562)
at org.apache.catalina.servlets.ManagerServlet.doPut(ManagerServlet.java:413)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:553)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2417)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:193)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:781)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:549)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:589)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.io.FileNotFoundException: JAR entry com/sun/faces/web-facesconfig_1_1.dtd not found in /var/jakarta-tomcat-4.
1.29/work/Standalone/localhost/FacesTemplate/WEB-INF/lib/jsf-impl.jar
at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:97)
at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:107)
at java.net.URL.openStream(URL.java:913)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown Source)
at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1548)
at com.sun.faces.config.ConfigureListener.parse(ConfigureListener.java:1188)
... 63 more
I checked the jsf-impl jar, and it does contain a web-facesconfig_1_1.dtd file, contrary to what the stack trace says. If my memory serves me correctly, the application ran fine on the server when it was at JSF 1.0, but when I upgraded it to 1.1_01, my problems began. The application runs fine at 1.1_01 within my development environment (Rational Web Developer v6) on my local machine (Windows XP). Can anyone shed some light on this problem for me?
Thanks!
Paul

Hi guys,
I think my question is near to you and i can get ready answer.
I have upgraded from JSF1.1_01 to JSF1.2. I am able to deploy my application now. The deployment is failing with an error,
Operation failed with error: Can't parse configuration file: code-source:/C:/OAS_1/j2ee/home/applications/test/SalesADFDemo/WEB-INF/lib/jsf-impl.jar!com/sun/faces/jsf-ri-runtime.xml: Error at line 3 column 14: code-source:/C:/OAS_1/j2ee/home/applications/test/SalesADFDemo/WEB-INF/lib/jsf-impl.jar!com/sun/faces/jsf-ri-runtime.xml: XML-20149: (Error) Element 'faces-config' used but not declared.
Please help me out. how can solve this? I am using Oracle App server 10g.

Thread (won't run on multiple CPUs)

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