Unexpected ClassCastException when looking up Home using JNDI
J2EE Gurus,
In the attached sample program, a EJB (named MyScheduler in package mytest) is
used to install a java code dynamically in weblogic service (8.1sp1), as well
as to invoke a test java code (MyTest.run()) in it using Java reflection. Another
EJB (named MyEJB in package myejb) is deployed dynamically using Weblogic console
with its client side packaged with dynamically deployed java code. When invoked
through MyScheduler, MyTest.run() simply looks up the home of MyEJB using JNDI,
and when it is cast to MyEJBHome, a ClassCastException is thrown.
Can someone explain why this exception occurs? Does this mean that a (dynamically)
deployed code (java or EJB) cannot call other (dynamically) deployed EJBs, even
when it has the client side of EJB packaged with it?
Any help will be deeply appreciated.
Thanks,
Abhay
[testjava.jar]
"Nick" <[email protected]> wrote in message news:40343200$[email protected]..
Because returned instance implements javax.sql.DataSource.Ha ha.
No kidding :-)No. One could have found it himself by printing out returned type class
or just by going to google and typing XADataSource weblogic +ClassCastException...
Why would you want to do it? weblogic takes care of all the XA
connection pooling, resource enlistments etc.Yeah, true.
I should know this - I just got a little confused ... :-)
I have just come from doing all the XA stuff myself... and got used to having
XADataSources around...Thanks to J2EE, there is no need for low level plumbing when transaction
support is needed.
Also, with JMS resources, you DO have to have the XAQueueConnection etc etc for
XA - even in an appserver.Per my knowledge weblogic allows you creating XA-aware JMS resources.
Regards,
Slava Imeshev
>
Thanks.
"Slava Imeshev" <[email protected]> wrote:
"Nick" <[email protected]> wrote in message news:403121e2$[email protected]..
I am getting a ClassCast exception when I lookup a "Global Transaction"enabled
JDBC DataSource.
XADataSource xads = (XADataSource) ctx.lookup("jdbc/MyDS");
Why is this?Because returned instance implements javax.sql.DataSource.
How do I configure an XADataSource in JNDI?Why would you want to do it? weblogic takes care of all the XA connection
pooling, resource enlistments etc.
Regards,
Slava Imeshev
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ClassCastException while looking up Home
I have created a CMP Customer Bean, whose persistence fields are ID(PK), name, password and address inside the package navin.ejb.ecommerce.
The bean has been deployed successfully.
Now I have made an Login servlet also in the same package which allows login to customers whose name and password match with those in the database.
But in the init() method when I lookup the bean, it gives the ClassCastException. The lookup should return a class of type navin.ejb.ecommerce.CustomerHome but it gives error as:
java.lang.ClassCastException: navin.ejb.ecommerce.CustomerBeanHomeImpl_ServiceStub
Can anyone tell me the possible solution. I am using Weblogic.Hello Navin,
Try this out
Object obj = ctx.lookup(<bean_jndi_name>);
CustomerHome home = (CustomerHome) PortableRemoteObject.narrow(obj, CustomerHome.class)
Also checkout the JNDI tree of the server, so that you are sure that teh name you are looking for in the lookup method is bound to the bean you want.
Hope this helps.
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Problem looking up datasorce using JNDI
Hi, I'm trying to access the oracle 8i database using datasource JNDI.My problem is connection was successful.but fetching operation failed..not able to get the values from the database.
Pls find below the method used in bean and error returned.
public Connection getConnection()
InitialContext ctx = null;
String dsname = "jdbc/gpadb";
try
Hashtable parms = new Hashtable();
parms.put("java.naming.factory.initial", "com.sun.jndi.cosnaming.CNCtxFactory");
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datasource = (DataSource)ctx.lookup(dsname);
objConnection = datasource.getConnection();
com.netscape.server.jdbc.DataSourceImpl dsi = (com.netscape.server.jdbc.DataSourceImpl)datasource;
if(objConnection != null)
System.out.println("*********Connection Successful*********"+objConnection);
System.out.println("dsi.getUserName(): >" + dsi.getUserName() + "<");
System.out.println("dsi.getPassWord(): >" + dsi.getPassWord() + "<");
System.out.println("dsi.getDataBase(): >" + dsi.getDataBase() + "<");
System.out.println("dsi.getDataSource(): >" + dsi.getDataSource() + "<");
System.out.println("dsi.getDriverType(): >" + dsi.getDriverType() + "<");
return objConnection;
else
System.out.println("*********Connection not Successful*********");
return objConnection;
catch(SQLException e) {
e.printStackTrace(System.out);
}catch(Exception e){
e.printStackTrace(System.out);
return objConnection;
public java.util.Vector getAllCountries(int intLanguageid) {
Vector objVcountry=new Vector();
Connection objConn =null;
CallableStatement objCstmt =null;
ResultSet objRs =null;
try
objConn = getConnection();
if (objConn != null)
String query = "begin ? := Pkg_common.Fn_GetCountries(?,?,?,?); end;";
objCstmt = objConn.prepareCall(query);
objCstmt.registerOutParameter(1,OracleTypes.CURSOR); //To register result set as out parameter
objCstmt.registerOutParameter(2,Types.INTEGER); //To register Error No as out parameter
objCstmt.registerOutParameter(3,Types.VARCHAR); //To register Error desc as out parameter
objCstmt.registerOutParameter(4,Types.INTEGER); //To register Record count as out parameter
objCstmt.setInt(5,intLanguageid); //To pass the Language id as i/p parameter
// 1 - English , 2 - Arabic
objCstmt.execute();
int intErrnum = objCstmt.getInt(2); //Fetch the Error no returned by the DB
int intRowcount = objCstmt.getInt(4); //To know the no.of records returned by Db
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement(objCstmt.getInt(2)+" "); //To return the error no
objVcountry.addElement(objCstmt.getString(3)); //To return error description
if ((intErrnum == 0) && (intRowcount >0))
objRs = (ResultSet) objCstmt.getObject(1);
while (objRs.next())
objVcountry.addElement(objRs.getString("COUNTRY_ID"));
objVcountry.addElement(objRs.getString("COUNTRY_NAME"));
objVcountry.addElement(objRs.getString("COUNTRY_CHAR"));
} else {
System.out.println("Failed to fetch the Countries :" + objCstmt.getString(3));
return objVcountry;
} else {
System.out.println("Failed to get database connection in the Online Track & Trace service");
objVcountry.addElement("-9999");
objVcountry.addElement(" Database connection Failed ");
return objVcountry;
} catch (SQLException e){
System.out.println("Failed to fetch the Countries " );
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement("-9057");
objVcountry.addElement(" Failed to fetch the Countries ");
return objVcountry;
} catch (Exception e){
System.out.println("Failed to fetch the status of Ministry Of Labour cards.");
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement("-9057");
objVcountry.addElement(" Failed to fetch the Countries ");
return objVcountry;
} finally{
try{
if(objRs!=null) objRs.close();
if(objCstmt!=null) objCstmt.close();
if(objConn!=null) objConn.close();
} catch(Exception e){
System.out.println("Got Exception while releasing the objects in getAllCountries() method");
e.printStackTrace();
return objVcountry;
This was the error thrown when i run my application
Going *********
Executing getHomeObject()method in Wrapper class
Retrieving JNDI initial context
Looking up Online track trace bean home interface
Looking up: java:comp/env/ejb/onlinetracktrace
*********Connection Successful*********com.netscape.server.jdbc.Connection@7b4703
dsi.getUserName(): >mack<
dsi.getPassWord(): >mack<
dsi.getDataBase(): >gpa.world<
dsi.getDataSource(): >gpa<
dsi.getDriverType(): >ORACLE_OCI<
Failed to fetch the Countries
Error Occured in the OnlinetracktraceBean method getAllCountries()
Going *********
Going *********
Null text data??
[03/Jan/2002 17:11:36:4] info: --------------------------------------
[03/Jan/2002 17:11:36:4] info: jsp.APPS.gpatracktrace.TTMOIncoming: init
[03/Jan/2002 17:11:36:4] info: --------------------------------------
Going *********
[03/Jan/2002 17:12:32:4] error: EB-serialize_ex: instance gpa.onlinetracktrace.SBSLOnlinetracktraceBean@3f5555 threw an exception
during serialization, ex = java.io.NotSerializableException: com.netscape.server.jdbc.DataSourceImpl
[03/Jan/2002 17:12:32:4] error: Exception Stack Trace:
java.io.NotSerializableException: com.netscape.server.jdbc.DataSourceImpl
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:845)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1567)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:453)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:911)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1567)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:453)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:911)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at com.kivasoft.eb.EBObjectBase.serializeImpl(Unknown Source)
at com.kivasoft.eb.EBObjectBase.releaseStatefulImpl(Unknown Source)
at com.kivasoft.eb.EBObjectBase.isTimeout(Unknown Source)Hi, I'm trying to access the oracle 8i database using datasource JNDI.My problem is connection was successful.but fetching operation failed..not able to get the values from the database.
Pls find below the method used in bean and error returned.
public Connection getConnection()
InitialContext ctx = null;
String dsname = "jdbc/gpadb";
try
Hashtable parms = new Hashtable();
parms.put("java.naming.factory.initial", "com.sun.jndi.cosnaming.CNCtxFactory");
ctx = new InitialContext(parms);
datasource = (DataSource)ctx.lookup(dsname);
objConnection = datasource.getConnection();
com.netscape.server.jdbc.DataSourceImpl dsi = (com.netscape.server.jdbc.DataSourceImpl)datasource;
if(objConnection != null)
System.out.println("*********Connection Successful*********"+objConnection);
System.out.println("dsi.getUserName(): >" + dsi.getUserName() + "<");
System.out.println("dsi.getPassWord(): >" + dsi.getPassWord() + "<");
System.out.println("dsi.getDataBase(): >" + dsi.getDataBase() + "<");
System.out.println("dsi.getDataSource(): >" + dsi.getDataSource() + "<");
System.out.println("dsi.getDriverType(): >" + dsi.getDriverType() + "<");
return objConnection;
else
System.out.println("*********Connection not Successful*********");
return objConnection;
catch(SQLException e) {
e.printStackTrace(System.out);
}catch(Exception e){
e.printStackTrace(System.out);
return objConnection;
public java.util.Vector getAllCountries(int intLanguageid) {
Vector objVcountry=new Vector();
Connection objConn =null;
CallableStatement objCstmt =null;
ResultSet objRs =null;
try
objConn = getConnection();
if (objConn != null)
String query = "begin ? := Pkg_common.Fn_GetCountries(?,?,?,?); end;";
objCstmt = objConn.prepareCall(query);
objCstmt.registerOutParameter(1,OracleTypes.CURSOR); //To register result set as out parameter
objCstmt.registerOutParameter(2,Types.INTEGER); //To register Error No as out parameter
objCstmt.registerOutParameter(3,Types.VARCHAR); //To register Error desc as out parameter
objCstmt.registerOutParameter(4,Types.INTEGER); //To register Record count as out parameter
objCstmt.setInt(5,intLanguageid); //To pass the Language id as i/p parameter
// 1 - English , 2 - Arabic
objCstmt.execute();
int intErrnum = objCstmt.getInt(2); //Fetch the Error no returned by the DB
int intRowcount = objCstmt.getInt(4); //To know the no.of records returned by Db
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement(objCstmt.getInt(2)+" "); //To return the error no
objVcountry.addElement(objCstmt.getString(3)); //To return error description
if ((intErrnum == 0) && (intRowcount >0))
objRs = (ResultSet) objCstmt.getObject(1);
while (objRs.next())
objVcountry.addElement(objRs.getString("COUNTRY_ID"));
objVcountry.addElement(objRs.getString("COUNTRY_NAME"));
objVcountry.addElement(objRs.getString("COUNTRY_CHAR"));
} else {
System.out.println("Failed to fetch the Countries :" + objCstmt.getString(3));
return objVcountry;
} else {
System.out.println("Failed to get database connection in the Online Track & Trace service");
objVcountry.addElement("-9999");
objVcountry.addElement(" Database connection Failed ");
return objVcountry;
} catch (SQLException e){
System.out.println("Failed to fetch the Countries " );
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement("-9057");
objVcountry.addElement(" Failed to fetch the Countries ");
return objVcountry;
} catch (Exception e){
System.out.println("Failed to fetch the status of Ministry Of Labour cards.");
if (objVcountry != null)
objVcountry.removeAllElements();
objVcountry.addElement("-9057");
objVcountry.addElement(" Failed to fetch the Countries ");
return objVcountry;
} finally{
try{
if(objRs!=null) objRs.close();
if(objCstmt!=null) objCstmt.close();
if(objConn!=null) objConn.close();
} catch(Exception e){
System.out.println("Got Exception while releasing the objects in getAllCountries() method");
e.printStackTrace();
return objVcountry;
This was the error thrown when i run my application
Going *********
Executing getHomeObject()method in Wrapper class
Retrieving JNDI initial context
Looking up Online track trace bean home interface
Looking up: java:comp/env/ejb/onlinetracktrace
*********Connection Successful*********com.netscape.server.jdbc.Connection@7b4703
dsi.getUserName(): >mack<
dsi.getPassWord(): >mack<
dsi.getDataBase(): >gpa.world<
dsi.getDataSource(): >gpa<
dsi.getDriverType(): >ORACLE_OCI<
Failed to fetch the Countries
Error Occured in the OnlinetracktraceBean method getAllCountries()
Going *********
Going *********
Null text data??
[03/Jan/2002 17:11:36:4] info: --------------------------------------
[03/Jan/2002 17:11:36:4] info: jsp.APPS.gpatracktrace.TTMOIncoming: init
[03/Jan/2002 17:11:36:4] info: --------------------------------------
Going *********
[03/Jan/2002 17:12:32:4] error: EB-serialize_ex: instance gpa.onlinetracktrace.SBSLOnlinetracktraceBean@3f5555 threw an exception
during serialization, ex = java.io.NotSerializableException: com.netscape.server.jdbc.DataSourceImpl
[03/Jan/2002 17:12:32:4] error: Exception Stack Trace:
java.io.NotSerializableException: com.netscape.server.jdbc.DataSourceImpl
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:845)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1567)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:453)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:911)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at java.io.ObjectOutputStream.outputClassFields(ObjectOutputStream.java:1567)
at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:453)
at java.io.ObjectOutputStream.outputObject(ObjectOutputStream.java:911)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:342)
at com.kivasoft.eb.EBObjectBase.serializeImpl(Unknown Source)
at com.kivasoft.eb.EBObjectBase.releaseStatefulImpl(Unknown Source)
at com.kivasoft.eb.EBObjectBase.isTimeout(Unknown Source) -
Unexpected result when parsing a datetime using sap.ui.core.format.DateFormat
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http://jsbin.com/sodetoyoqaba/1/edit?html,js,console
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com.sun.corba.se.internal.javax.rmi.CORBA.Util
minor code: 0 completed: No
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I turned the "fork" property to "true" and now everything works
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"Olivier" <[email protected]> wrote:
>
Hi,
I've just upgraded to WLS7 sp2.
I get the following error when trying to access a session bean from a
remote client
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java.lang.ExceptionInInitializerError:
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com.sun.corba.se.internal.javax.rmi.CORBA.Util
minor code: 0 completed: No
at javax.rmi.CORBA.Util.createDelegateIfSpecified(Util.java:303)
at javax.rmi.CORBA.Util.<clinit>(Util.java:48)
at javax.rmi.PortableRemoteObject.createDelegateIfSpecified(PortableRemoteObject.java:177)
at javax.rmi.PortableRemoteObject.<clinit>(PortableRemoteObject.java:56)
etc... (my app's classes here)
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Also, I tried it with ACC. In sun sample ConverterClient.java under rmi-iiop/simple, I added following code under with ACC and without ACC. With ACC, I can get connection. But without ACC, I can't get it.
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Remember to switch the "outgoing mail server" back to your home server when you return home. By the way, most places (like hotels) will give you their outgoing mail server info if you ask them, so next time you're on a cruise with wifi you might try asking the IT people.
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-
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==============================================
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Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ 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 by pressing the key combination 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
In the Console window, look under User Diagnostic Reports (not "Diagnostic and Usage Messages") for crash reports related to the crashed process. The report name starts with the name of the 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 other kinds of diagnostic report — they're very long and not helpful. -
When i try to use my ipod it looks like the brightness was turned wayyyyy down. Like more than normal. I cant see anything. How do i fix it?
Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar -
Hi there, I am trying to connect to my server at work from home using a vpn connection. It connects fine and the time ticks along, but when i click go - connect to server, it comes up with connection failed. Please help!
... when i click go - connect to server, it comes up with connection failed.
If you're trying to connect to a Bonjour server on the remote network, that won't work over a layer 3 VPN. Use something like Hamachi or one of the SSH-tunnelling Bonjour proxy apps for that. -
Using Outlook 2007 I want to receive emails on my iPhone 4 only when Outlook is NOT open on my computer, as when away from home or want to quickly check email when computer is not turned on. Either ALL emails come to my iPhone or none at all. Is the setting I need to change in Outlook or on the iPhone or is it somewhere else? I used to have this setting but transferring Outlook to a new laptop somehow turned it off.
No. You really can't do that. Not easily at any rate. You would have to set them both up to use POP3, but even then there is no way to guarantee that the phone won't poll the server prior to your computer doing so, pulling down the message from the server.
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My safari keeps closing unexpectedly and when it does it tells me that it quite while using the .GameHouseBeachParty.so plugin. I have no idea what this means! Can someone please help me fix this?
You have the Flashback trojan.
Check out the replies in this thread for what to do;
https://discussions.apple.com/message/18114958#18114958 -
I charged my nano on my work PC, when i went to use it at home it is now unresponsive and I get a message that the device cannot be recognized by windows? How do I restore it
Try placing the iPod in recovery mode (I think that is what you were try to do) and then try to restore the iPod. For recovery mode see:
iPhone and iPod touch: Unable to update or restore
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