Classcast exception when getAttribute called.

I am having an issue when I pull an object out of the session and cast it to
          the correct type, I get a class cast exception. This exception normally
          occurs when some other exception is thrown in the system. It also occurs on
          Solaris more often than on NT. I see on NT if I rebuild the and deploy the
          servlet and support classes ( which would make sense, since the classes have
          changed).
          Thanks,
          Don Reamey

Yes, I have posted workarounds as have others. There are also workarounds
          in the WL online doc.
          1. Sometimes changing the location of the class file will work. Moving it
          so that it is not loaded by the servlet class loader will sometimes solve
          the problem.
          2. You can serialize the data (into a byte array) stored in HttpSession.
          3. Sometimes the error is avoided completely by invoking a JSP when the
          server starts up before any servlet is called.
          ... and so on.
          Cameron Purdy
          http://www.tangosol.com
          "Don Reamey" <[email protected]> wrote in message
          news:[email protected]...
          > Do you know of any work arounds?
          >
          > Don Reamey
          > www.ibexone.com
          >
          > "Cameron Purdy" <[email protected]> wrote in message
          > news:[email protected]...
          > > This is what we refer to as "that dreaded class cast exception". You
          will
          > > find a phethora of comments and workarounds on the jsp and servlet
          > weblogic
          > > newsgroups.
          > >
          > > --
          > >
          > > Cameron Purdy
          > > http://www.tangosol.com
          > >
          > >
          > > "Don Reamey" <[email protected]> wrote in message
          > > news:[email protected]...
          > > > I am having an issue when I pull an object out of the session and cast
          > it
          > > to
          > > > the correct type, I get a class cast exception. This exception
          normally
          > > > occurs when some other exception is thrown in the system. It also
          occurs
          > > on
          > > > Solaris more often than on NT. I see on NT if I rebuild the and deploy
          > the
          > > > servlet and support classes ( which would make sense, since the
          classes
          > > have
          > > > changed).
          > > >
          > > > Thanks,
          > > >
          > > > Don Reamey

Similar Messages

Classcast exceptions when persistence units deployed as shared libraries

Hi
We are using weblogic 10.3.3 & eclipse link 2.0 persistent units:
We have uim-entities.jar(persistent unit) under uim-core-lib.ear(/APP-INF/lib) that is deployed as a shared library. We have multiple applications(ears) referring to this shared library (same persistent name, "default") using lib-ref in weblogic-application.xml. We are facing issue while deploying and running the application.(Primarily classcast exceptions on log4j classes and entity DAOs). If the persistent unit is replication in each app's APP-INF/lib, we are not seeing those exceptions.
Are there any known issues in using persistent units as shared libraries.
Pasting the exception for your reference:
log4j:ERROR Could not create an Appender. Reported error follows.
java.lang.ClassCastException: org.apache.log4j.ConsoleAppender cannot be cast to org.apache.log4j.Appender
at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:238)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:171)
at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:184)
at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:502)
at org.apache.log4j.xml.DOMConfigurator.parseCategory(DOMConfigurator.java:415)
at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:919)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:790)
at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:682)
at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:811)
at oracle.communications.inventory.api.framework.logging.LogFactory.<clinit>(LogFactory.java:176)
at oracle.communications.inventory.api.framework.listener.InventoryEntityLifeCycleEventListener.<clinit>(InventoryEntityLifeCycleEventListener.java:36)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getClassForName(PrivilegedAccessHelper.java:88)
at org.eclipse.persistence.internal.jpa.metadata.listeners.EntityListenerMetadata.getClassForName(EntityListenerMetadata.java:158)
at org.eclipse.persistence.internal.jpa.metadata.listeners.EntityListenerMetadata.process(EntityListenerMetadata.java:311)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.MappedSuperclassAccessor.processEntityListeners(MappedSuperclassAccessor.java:796)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processListeners(EntityAccessor.java:1064)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.addEntityListeners(MetadataProcessor.java:104)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:327)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:151)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:207)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:195
Thanks,
Murali

Murali,
Hi, the CCE for Apache Log4J is outside of the scope of JPA - i have not see the "oracle.communications.inventory.api.framework.logging" package in play before - what kind of connection factory are you using or are you using JTA?
Note: WebLogic 10.3.4.0 has been upgraded to enable container managed persistence context injection and no longer requires the use of shared libraries. See the wiki post...
http://wiki.eclipse.org/EclipseLink/Development/JPA_2.0/weblogic#Enabling_JPA2_support
For WebLogic 10.3.3.0 and JPA 2.0 usage as application managed libraries using the <wls:prefer-application-packages/> weblogic-application.xml tag see the wiki post...
http://wiki.eclipse.org/EclipseLink/Development/JPA_2.0/weblogic#DI_1.1:_Alternative_3:_Application_Level_Shared_Library_-InUse
thank you
/Michael O'Brien
http://www.eclipselink.org

ClassCast Exception when trying to cast a getApplet() call.

I have a quick question abotu Applet Contexts.
I have an applet that tries to get the context of another applet on
the same page. The following is a sample of what I'm doing:
try {
TestApplet app =
(TestApplet)getAppletContext().getApplet("test");
catch (Exception err) {
err.printStacjTrace();
The above gives me a ClassCastException error. Yet if I remove the
cast and just get do the following:
Applet app = getAppletContext().getApplet("test");
I actually get a hold of it and when I examine the class name of app,
it is TestApplet.
But if I try to cast it, I get the same error (i.e. (TestApplet)app).
I have tried the above approches as well a variation of the parenthesis grouping, i.e.:
TestApplet app = (TestApplet)(getAppletContext().getApplet("test"));
or
Applet app = getAppletContext().getApplet("test");
((TestApplet)app).methodCall();
and they all give me the same result.
Does anyone have any ideas as to how to resolve this issue? Any hints
or help will be greatly appreciated.
Jorge Fraser.

I'm almost willing to bet that the two Applets are loaded from different ClassLoaders.
If two Applets are on the same page, but they have different lists of required classes, then for some wacky reason they seem to load in different ClassLoaders.
If two applets load from different classloaders, then even if they are in the same JVM, you cannot cast one to the other.
You can test this by calling applet.getClass().getClassLoader(), and printing the value out just to see if they're the same reference.
If this is indeed your problem, then this is a major pain for you, and you'll need to cheat by putting the same list of classes in both applets.
This happened to us, and I won't go into gory details but we had an applet using JARs A, B and C, and another applet using JARs A, D and E, and needed a third applet which could take screenshots of the other two. As a result we had to make all three applets use all five JARs, and there was no way to stop this. (Even using a static method to register each applet falls down, because the static contexts are different in the two classloaders.)

My volume isn't working except when phone calls come in. It does work when I plug in head phones. I don't have the option on the screen to adjust volume.

Also, the "change with buttons" is on. If I reset everything, do I lose text messages and emails and info? Also, I have a 4S and software is uptodate.

I had this problem yesterday also
did it get right or not yet?

Exception when trying to acess a jsf application

Im using eclipse 3.3 , tomcat 5.5.2x
index.jsp
========
<html>
<body>
<jsp:forward page="faces/ourJsf/enterAge.jsp" />
</body>
</html>
============
enterAge.jsp
=========
<%@ page contentType="text/html; charset=Cp1252" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
     <head>
          <meta http-equiv="Content-Type" content="text/html; charset=Cp1252"/>
          <title>Dog's Life</title>
     </head>
     <body>
          <f:view>
               <h:form>
               <h:outputText value="Enter your age please"/>
<h:inputText value="#{dog.age}" />
<h:commandButton value="Calculate Dog Years" action="#{dog.calcYears}" />
               </h:form>
          </f:view>
     </body>
</html>
=========
faces-config.xml
==========
<?xml version="1.0"?>
<!DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN" "http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
<faces-config>
     <managed-bean>
          <managed-bean-name>dog</managed-bean-name>
          <managed-bean-class>beans.DogBean</managed-bean-class>
          <managed-bean-scope>session</managed-bean-scope>
     </managed-bean>
     <navigation-rule>
          <from-view-id>/ourJsf/enterAge.jsp</from-view-id>
     </navigation-rule>
     <navigation-rule>
          <from-view-id>/ourJsf/enterAge.jsp</from-view-id>
          <navigation-case>
               <from-outcome>success</from-outcome>
               <to-view-id>/ourJsf/result.jsp</to-view-id>
          </navigation-case>
          <navigation-case>
               <from-outcome>failure</from-outcome>
               <to-view-id>/ourJsf/error.jsp</to-view-id>
          </navigation-case>
     </navigation-rule>
</faces-config>
================
a portion of my web.xml
=============

<filter>
<filter-name>extensionsFilter</filter-name>
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class>
<init-param>
<param-name>uploadMaxFileSize</param-name>
<param-value>100m</param-value>
<description>Set the size limit for uploaded files.
Format: 10 - 10 bytes
10k - 10 KB
10m - 10 MB
1g - 1 GB
</description>
</init-param>
<init-param>
<param-name>uploadThresholdSize</param-name>
<param-value>100k</param-value>
<description>Set the threshold size - files
below this limit are stored in memory, files above
this limit are stored on disk.
Format: 10 - 10 bytes
10k - 10 KB
10m - 10 MB
1g - 1 GB
</description>
</init-param>

</filter>
<filter-mapping>
<filter-name>extensionsFilter</filter-name>
<url-pattern>*.jsf</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>extensionsFilter</filter-name>
<url-pattern>/faces/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>



<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
=============
i'm getting an exception when i call my application :
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:476)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:371)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:156)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:691)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:661)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:46)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
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     org.apache.myfaces.application.jsp.JspStateManagerImpl.restoreView(JspStateManagerImpl.java:283)
     org.apache.myfaces.application.jsp.JspViewHandlerImpl.restoreView(JspViewHandlerImpl.java:255)
     org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.java:141)
     org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:66)
     javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
     org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:691)
     org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:661)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:46)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.23 logs.
Apache Tomcat/5.5.23
Thank yoiu guys for helping me : this my very first jsf application

Hello,
Like you said it was the problem with url.
The webservice I used is actually running on the local machine (where the NetWeaver developer studio is installed); so in the url I had specified localhost. But I deployed the application on another server(SAP J2EE Engine). That is why it didn't work. On changing the url as required, the application is working fine.
Thanks !
Regards,
Loveline.

Classcast exception while sending objects to the server

I'm getting classcast exception when i try to send objects from the java webstart application at the client side to a server. Its working fine if I do the same without using javaweb start. I'm using hessian client to send objects to the server.
I've a web app that gets outlook contacts from the client machine and send those to the server. I'm sending these contacts as custom objects(OutlookContact) to the server using hessian client. But these objects are being sent to the server as String objects but not as OutlookContact objects. I don't know whats happening. Can anyone please tell me is there any setting that I need to set in the jnlp file.
thanks,
Jayaram

I am also getting the same error. Please anybody can help

The battery of my macbook died in 2 years and when I call an inform them Mr ********** (sr advisor) gets outrightly rude and tells me sorry but don't think that you can be an exception to it. Extremely shocked at this approach by apple.

The battery of my macbook died in 2 years and when I call the servise center to inform them cuse i personally am dissapointed but at the same time want to know the reason why something like this has happened ith a product of apple. Mr ****** (sr advisor) gets outrightly rude and tells me sorry but don't think that you can be an exception to it. Extremely shocked at this approach by apple. Then throughout the conversation he chose to mute me and wouldnt answer my queries. And when i asked him whos the serior I could talk to. He tells me "Im the seriormost that you can get upto..there is nobody above me you can talk to".
Now what do i do???
<Edited by Host>

By doing so, you are violating the terms of use of this support forum
"Post constructive comments and questions. Unless otherwise noted, your Submission should either be a technical support question or a technical support answer. Constructive feedback about product features is welcome as well. If your Submission contains the phrase “I’m sorry for the rant, but…” you are likely in violation of this policy."
"Breach of the Agreement
If you fail to abide by these terms Apple may remove your submission. Apple may also send an e-mail that informs you that your Submission has been deleted or edited. Repeated inappropriate Submissions may result in your relevant account or accounts being placed into temporary or permanent suspension of your ability to participate in any or all of the areas on the Site."
https://discussions.apple.com/static/apple/tutorial/tou.html

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In WL6.1, I have an Ejb with secured methods. The (Swing) client application accesses the Ejb through rmi-iiop using the JDK1.3.1 Orb.
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//NEXT LINE Crashes when method is secured:
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finally {
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Andy Piper <[email protected]> wrote:
Allard Siemelink <[email protected]> writes:
In WL6.1, I have an Ejb with secured methods. The (Swing) client applicationaccesses the Ejb through rmi-iiop using the JDK1.3.1 Orb.
Unfortunately, it seems that the caller identity (which was suppliedin the InitialContext lookup) is not propagated
to the server: any call to a secured method
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CNCtxFactory. Only the former will give you security.
andy

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ENDIF.
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HT2188 I can hear caller but they can not hear me except when using speaker phone

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Please mark this as "solved my problem" or "helped me"!

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at System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)
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I am getting the following error message in both Visual Studio 2012 and Visual Studio 2013 when I try to open any "Feature" in a SharePoint 2013 project.
An exception occurred while calling the 'OnImportsSatisfied' method on type 'Microsoft.VisualStudio.SharePoint.Designers.Package.ViewModels.FeatureViewModel'.
(the stack trace then continues on for ages - shown in full below)
I _think_ this started happening when I ran Windows Update recently.
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I have tried:
Removing all Windows Updates from the past week
Removing all previous versions of Visual Studio (2012)
Completely uninstalling and reinstalling Visual Studio (with reboots inbetween)
Installing VS2013 Update 1
Nothing that I do seems to fix this ..
Full Error:
regards
Martin Hatch
MCPD & MCITP SharePoint 2010
MCTS WSS 3.0 | MOSS 2007
www.martinhatch.com

Hi,
Please check that whether you have installed the Microsoft Office Developer Tools for Visual Studio 2012.
The link below will provide more details:
Prerequisites for creating SharePoint 2013 projects using Visual Studio 2012
Best regards
Patrick Liang
TechNet Community Support

Why there's error stating "unreported exception" when call function

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========================================================================
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========================================================================
How come when I call the above readfile(), it gives me :
DeleteScreen.java:70: unreported exception java.lang.Exception; must be caught or declared to be thrown
readfile();
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but the writefile() function which I called in the
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Your call to writefile() is in the method readfile() that already declares that it throws Exception. So there is no problem there.
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