What does "Illegal Constant Pool Type" error signify ?

Hello,
I have developed an application on a windows system that connects to a database, places values onto an object, and displays on a screen. When I run on a windows environment everything works fine. When I export to my external server, which is linux system, I get an "Illegal Constant Pool Type" error.
What does this mean and how can I rectify?
The error message can be found at:
http://www.blazingvibes.com/blazinvibes/indexhome.jsp
Thank you all for your help.

No idea since I can't see the error or code.
And I don't know about anyone else but I don't click on links unless I know the source, so its current location isn't going to help in that matter.
Presumably you are doing printStackTrace() so the location of the error is obvious.

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Illegal constant pool type error

hi friends,
i would like to know the possible causes of this error ... i got this as soon as i deployed a class into tomcat ... Given below is the entire error i got while starting the tomcat server .....
java.lang.ClassFormatError: com/infraportal/servlets/ipInitializer (Illegal cons
tant pool type)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(Webapp
ClassLoader.java:1677)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoa
der.java:900)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1350)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoa
der.java:1230)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.
java:979)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:88
7)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContex
t.java:3959)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
284)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:866)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:85
0)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:638)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDep
loyer.java:320)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:875)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.j
ava:727)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:477
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1008)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:394)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:166)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1134)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:832)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1126)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:521
at org.apache.catalina.core.StandardService.start(StandardService.java:5
19)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:234
5)
at org.apache.catalina.startup.Catalina.start(Catalina.java:594)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:297)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:398)
i will be glad to see some quick answers / comments on this
thanks and regards
venky

This error can be caused by a corrupt class file. Check it was transferred correctly.

"Illegal constant pool type"...how do I fix this????!!

I have a method that previously ran perfectly and now will not even start. It keeps giving me the following error message:
"Exception in thread "main" java.lang.ClassFormatError: WF_RevAnalysis (Illegal constant pool type)"
...(where 'WF_RevAnalysis is the name of my class)
Could someone please tell me what an illegal constant pool type is and how I can fix/see/change it???
Thanks!

No I haven't installed a new JRE. The method was working fine...then suddenly 15 minutes later it started giving the illegal pool type error.
Do you by chance know how to find this Constant Pool?

Illegal constant pool type??

Hi there,
Anyone knows what's going on here????? any help appreciated!
[java] java.lang.ClassFormatError: com/bellsouth/estore/cbs/sbvs/relatedaccount/ejb/RelatedAccountServiceBean
(Illegal constant pool type]
[java] at java.lang.ClassLoader.defineClass0(Native Method)
[java] at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
[java] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
[java] at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
[java] at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
[java] at java.security.AccessController.doPrivileged(Native Method)
[java] at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
[java] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:290)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
[java] at weblogic.ejb20.deployer.BeanInfoImpl.loadClass(BeanInfoImpl.java:297)
[java] at weblogic.ejb20.deployer.BeanInfoImpl.<init>(BeanInfoImpl.java:155)
[java] at weblogic.ejb20.deployer.ClientDrivenBeanInfoImpl.<init>(ClientDrivenBeanInfoImpl.java:157)
[java] at weblogic.ejb20.deployer.SessionBeanInfoImpl.<init>(SessionBeanInfoImpl.java:103)
[java] at weblogic.ejb20.deployer.BeanInfoImpl.createBeanInfoImpl(BeanInfoImpl.java:327)
[java] at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.initializeBeanInfos(MBeanDeploymentInfoImpl.java:395)
[java] at weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.<init>(MBeanDeploymentInfoImpl.java:126)
[java] at weblogic.ejb20.ejbc.EJBCompiler.setupEJB(EJBCompiler.java:128)
[java] at weblogic.ejbc20.runBody(ejbc20.java:358)
[java] at weblogic.utils.compiler.Tool.run(Tool.java:79)
[java] at weblogic.ejbc20.main(ejbc20.java:460)
[java] Exception in thread "main"
[java] Java Result: 1

Bt the way, there could be another tricky issue. If one uses CVS and checks
in ejbjar without setting -kb on it, the ejbjar that is cheked out will be
broken,
at least for default CVS settings.
Slava
"Cameron Purdy" <[email protected]> wrote in message
news:[email protected]...
It looks like a malformed class file. Run the verifier (or javap) against
that class. Turn off JAR compression. Transport files via ftp with the"bin"
setting. etc.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Dong" <[email protected]> wrote in message
news:[email protected]...
Hi there,
Anyone knows what's going on here????? any help appreciated!
[java] java.lang.ClassFormatError:com/bellsouth/estore/cbs/sbvs/relatedaccount/ejb/RelatedAccountServiceBean
(Illegal constant pool type]
[java] at java.lang.ClassLoader.defineClass0(Native Method)
[java] at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
[java] atjava.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
[java] atjava.net.URLClassLoader.defineClass(URLClassLoader.java:248)
[java] at
java.net.URLClassLoader.access$100(URLClassLoader.java:56)
[java] at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
[java] at java.security.AccessController.doPrivileged(NativeMethod)
[java] atjava.net.URLClassLoader.findClass(URLClassLoader.java:188)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
[java] atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:290)
[java] at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
[java] atweblogic.ejb20.deployer.BeanInfoImpl.loadClass(BeanInfoImpl.java:297)
[java] atweblogic.ejb20.deployer.BeanInfoImpl.<init>(BeanInfoImpl.java:155)
[java] at
weblogic.ejb20.deployer.ClientDrivenBeanInfoImpl.<init>(ClientDrivenBeanInfo
Impl.java:157)
[java] at
weblogic.ejb20.deployer.SessionBeanInfoImpl.<init>(SessionBeanInfoImpl.java:
103)
[java] at
weblogic.ejb20.deployer.BeanInfoImpl.createBeanInfoImpl(BeanInfoImpl.java:32
7)
[java] at
weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.initializeBeanInfos(MBeanDep
loymentInfoImpl.java:395)
[java] at
weblogic.ejb20.deployer.MBeanDeploymentInfoImpl.<init>(MBeanDeploymentInfoIm
pl.java:126)
[java] atweblogic.ejb20.ejbc.EJBCompiler.setupEJB(EJBCompiler.java:128)
[java] at weblogic.ejbc20.runBody(ejbc20.java:358)
[java] at weblogic.utils.compiler.Tool.run(Tool.java:79)
[java] at weblogic.ejbc20.main(ejbc20.java:460)
[java] Exception in thread "main"
[java] Java Result: 1

Java.lang.ClassFormatError: JavaBanner (Illegal constant pool type)

How do I resolve this error? If you know please e-mail me @ [email protected] . Thank You. Thomas

Why do you post the same thing in two different threads? Check the other thread. If you haven't got over it, give me the complete stack trace and the other details.

Reflection error (Illegal constant pool index)

Heya,
I use reflection to invoke Java classes and I get Error:
java.lang.ClassFormatError: AppendToElement (Illegal constant pool index)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:431)
     at XCOClassLoader.loadClass(XCOClassLoader.java:74)
// AppendToElement is name of class I want to invoke
I have bunch of classes from someone else, which I need to invoke and I get this error for all of them. When I invoke classes written (and compiled) by me, everything is OK.
It seems that the problem is that, these external classes were compiled with different version of Java. As they were written by someone else and I don't have source code, I can't recompile them.
Is cause of that problem, different JVM versions ? Is there a way how to correct it on runtime ?
Thanks,
Michal

The problem isn't one of versions. The files have become corrupted somehow. I suggest you ask for another copy.

Exception with newFixedThreadPool - Illegal constant pool index

Hi,
I got the following exception :
Exception in thread "main" java.lang.ClassFormatError: Illegal constant pool index 1536 for method signature in class file java/util/concurrent/LinkedBlockingQueue
at java.util.concurrent.Executors.newFixedThreadPool(Unknown Source)
When executing the following line:
ExecutorService es = Executors.newFixedThreadPool(10);
What this error mean ?
Thanks

From the javadoc for java.lang.ClassFormatError:
'Thrown when the Java Virtual Machine attempts to read a class file and determines that the file is malformed or otherwise cannot be interpreted as a class file.'
Reinstall.

Illegal constant pool index ????

Hi
I wrote a hello world program using J2ME with a view to writing a game for a mobile phone. I'm a C++ programmer and have never looked a java befor so I have no idea what is going on under the sheets.
The hello world program is called Welcome (straight out of Sun's J2ME book). It seemed to compile ok and left me with a file called Welcome.class
Following the instructions in the book and working from the Command Line on WindowsXP I typed
d:\preverify ....etc
I got the following
Error preverifying class Welcome
Class loading error: Illegal constant pool index
I've double checked everything and can't find a problem - any ideas?
Cheers
Steve

Stupid - hadn't downloaded the runtime

Illegal start of type error when adding for loop to applet

I have typed the following applet to print a horizontal row of stars with the length entered by the user (i.e. user enters 4 and applet prints out 4 stars in a row). Here is my code:
import java.awt.Graphics;
import javax.swing.*;
public class Histograms extends JApplet
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        int number;
     public void init()
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                                System.out.print( "*" );
           System.out.println();
};Now I am trying to make it do this 5 times, so it seems like just surrounding the init and paint methods in a for loop (i.e. for ( int i=1; i <= 5; i++ ) ) would do the trick but when I do that I get an illegal start of type error when trying to compile. Does anyone know why this error would show up. The most common reply to questions of this sort seems to be to check the closing braces but I have checked very carefully after adding the for loop and don't see any problems with mismatched braces. Could you please help me get on the right track as to how I can make this applet print a horizontal row of stars five times? All help is appreciated.

Hello JTMOBOP:
You were correct in figuring that I was trying to get the applet to print five rows of stars of different length according to five different inputs from the user. I tried your suggestions, and the code now does compile and run, but it still does not run properly (i.e. only asks user once for input and displays row of stars but does not show an input dialog again). Here is the code I have retyped:
import java.awt.Graphics;
import javax.swing.*;
public class Histograms extends JApplet
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   public void init()
      for ( int i = 0; i < 5; i++ )
         input = JOptionPane.showInputDialog ( null,
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   public void paint ( Graphics g )
      for ( int i = 0; i < 5; i++ )
         for ( int myNumber = 0; myNumber <= number; myNumber++ )
System.out.print( "*" );
System.out.println();
Any ideas what's going on here?
Also, your comments about not being able to loop a method make sense. Thank you for the input so far.

What does it mean when an error on downloading says cannot contact reliable source?

what does it mean when an error on downloading says cannot contact reliable source?

It's a problem with the download helper; download the offline installer from http://get.adobe.com/reader/enterprise/
If you need more help, please specify your operating system & version.

Whats a String constant pool?

I was reading an article about weak references and came across a peice of code
Map<String,String> map = new WeakHashMap<String, String>();
map.put(new String("Scott"), "McNealey");They also said
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Jubs

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kind regards,
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/oracleapp/admin/mybk/udump/mybk_ora_651394.trc
Oracle Database 10g Release 10.2.0.1.0 - 64bit Production
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Release: 3
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Machine: ##########
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Redo thread mounted by this instance: 1
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*** 2007-01-19 16:30:15.302
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Message was edited by:
user508054

I think I need more investigation about this. I found two papers last night:
http://www-128.ibm.com/developerworks/linux/linux390/perf/tuning_rec_database_OracleRec.html
http://www.netapp.com/library/tr/3408.pdf
with a previous online paper mentioning to alter the maxservers of aio0. Although this is an alternative, I tried to increase the value to 300 (500 at this moment) and it does not seem to work. On other hand, with change of the disk_asynch_io, it will hinder the exp/imp pump. So I really don´t know what to say.
Apparently the disk_asynch_io needs to be FALSE in order to speed up the backup. just verified again, even with my maxserver=500 did not help.
Message was edited by:
user508054
Use the expdp to dump my db with the asynch_io in FALSE. It looks OK, no delay.
Message was edited by:
user508054

HELP- what does this mean- time machine error- backup disk image "/Volumes/time Capsule/ cheryl lynott's MacBook.sparsebundle" is already in use?

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We're you able to get your email previously with the same device?

What does the 'TO' lock type represent?

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Sam Santiago
[email protected]

I looked up the documentation too and noticed it wasn't mentioned. Here's the output from a query on DBA_LOCK showing that lock type:
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9     TO     Row-X (SX)     None     635667     1     199     Not Blocking
9     TO     Row-X (SX)     None     635664     1     196     Not Blocking
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What does "Illegal Constant Pool Type" error signify ?

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