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Unknown runtime error Line: 120 Char: 1 Code: 0 URI: 3_3_3.Finalorg.ajax4jsf.javascript.AjaxScript

Panos — Tue, 30 Aug 2011 11:55:27 +0000

Not strictly Java related but I thought I could post it here. I was getting the error

Unknown runtime error Line: 120 Char: 1 Code: 0 URI: 3_3_3.Finalorg.ajax4jsf.javascript.AjaxScript

on I.E. (FF and Chrome worked fine) when I included a form within a form in RichFaces. As soon as I got rid of the second form (in the included file) the problem went away.

Caused by javax.persistence.TransactionRequiredException with message: “no transaction is in progress”

Panos — Mon, 02 May 2011 09:50:39 +0000

This is weird, I am not sure why I am getting it. I have an application that makes some calculations that take some considerable time, and I persist the results. I run my application with 100 records from the database and everything works fine. I run my application with 60.000 records from the database and I am getting the above error message. The exception happens when the flush() method is called on the EntityManager. If I am to have a wild guess I’d say that there is a transaction time out (it is set to 30 seconds in the weblogic console) and therefore when the flush() method is called there is no active transaction.

Anyway I managed to overcome this issue by explicitly defining a user transaction

import org.jboss.seam.transaction.Transaction;
import org.jboss.seam.transaction.UserTransaction;
...
...

UserTransaction ut = Transaction.instance();
ut.begin();
...
...
ut.commit();

If you have any idea why this is happening please leave a comment.

UPDATE: Now the first transaction (the one with 100 records) fails. It complains that there is already one transaction active when I try to start a new one. I guess I need to revert my code and to increase the transaction timeout on the weblogic console, this would solve both issues.

javax.naming.OperationNotSupportedException: bind not allowed in a ReadOnlyContext; remaining name

Panos — Tue, 01 Mar 2011 09:08:05 +0000

I got this exception when i tried to define a mail session in WebLogic’s console. I defined the JNDI name to be java:/Mail but it seems that WebLogic does not like the java:/ prefix, so I had to remove it (both from the console and the calling code), and it worked.

org.hibernate.MappingException: broken column mapping for

Panos — Wed, 16 Feb 2011 08:46:01 +0000

I got this error when I tried to map a child element by using its parent’s foreign key. I had a parent element with a region id (as foreign key) and I needed to get the child element whose primary key was this region id (and a language id). My child element (Region.hbm.xml) had a composite primary key

and in my parent I did

but this resulted in “org.hibernate.MappingException: broken column mapping for” error.

I had to split the child’s composite key

and add a formula property in my parent’s class mapping

so that hibernate could link the region id of the parent to the region id of the child. And since I needed a record based also on the language code (but my parent didn’t have any language code column) I had to manually add search criteria

crit.createCriteria("region").add(Restrictions.eq("languageCode", 1));

How to retain/get only the duplicate elements in a list

Panos — Fri, 04 Feb 2011 10:41:47 +0000

Let’s say you have a list of duplicate (and non-duplicate) items, and you want a new collection with only the duplicate items in there. The easiest way is to extend the HashSet.

public class DuplicatesOnlySet extends HashSet
{
    private final Set uniques = new HashSet();

    public  DuplicatesOnlySet(Collection c) 
    {
        super.addAll(c);
    }

    @Override
    public boolean add(E e) 
    {                
        if(!this.uniques.add(e))
             return super.add(e);

    return false;
    }
}

Call it like

List duplicates = new ArrayList(new DuplicatesOnlySet(original)) ;

where original is the Collection with the duplicate items.

Compliments to Markos for his implementation.

java.lang.StackOverflowError and Hibernate

Panos — Thu, 30 Dec 2010 08:37:48 +0000

If you have set up your relationships correctly in your @Entity bean but you are still getting this error, I have found out that by explicitly setting the Query‘s flush mode type to COMMIT you can avoid recursive calls that result in a StackOverflowError

query.setFlushMode(FlushModeType.COMMIT);	// Avoid recursive call and StackOverflowError

Error loading element Identity with component name null and component class null

Panos — Fri, 10 Dec 2010 14:34:41 +0000

This error is related to this post, and is solved by the exact same manner.

1) Edit your application.xml and move the jboss-seam.jar module to the top.
2) Edit each MANIFEST.MF file of the rest of your modules defined in the application.xml and remove the jboss-seam.jar entry.
3) Rebuild and redeploy your ear.

ORA-12505: TNS:listener does not currently know of SID given in connect descriptor

Panos — Thu, 09 Dec 2010 09:44:47 +0000

I am not sure why I get this error since I can connect to the current SID by using sqlplus but I cannot connect to it by using jdbc with the following url:

jdbc:oracle:thin:@aHost:1521:theSID

After searching for about an hour I found out that you can also use the full blown jdbc url protocol to connect to oracle

jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=aHost) (PORT=1521))(CONNECT_DATA=(SERVICE_NAME=theSID)))

This does not explain why the issue happens but at least for now it solves the problem. I will post an update if I find anything else.

java.lang.ClassCastException: YOUR_REPORT_NAME_1290416522329_455758 cannot be cast to net.sf.jasperreports.engine.fill.JREvaluator

Panos — Fri, 03 Dec 2010 08:28:27 +0000

Another classloading issue. While jasper reports work fine on JBoss, on WebLogic they fail with the exception

net.sf.jasperreports.engine.JRException: Error loading expression class : MYREPORT_1290416522329_455758 ... Caused by: java.lang.ClassCastException: MYREPORT_1290416522329_455758 cannot be cast to net.sf.jasperreports.engine.fill.JREvaluator at net.sf.jasperreports.engine.design.JRAbstractJavaCompiler.loadEvaluator(JRAbstractJavaCompiler.java:101)

This is easily resolved. In my configuration it was just a matter of moving my jasper jar file from the root of ear to the WEB-INF/lib folder of my web app, in order to be picked up by a different classloader. If this does not work try moving the jasper jar file around in different locations, one of them will work.

ClassNotFoundException: org.hibernate.hql.ast.HqlToken

Panos — Thu, 02 Dec 2010 11:08:43 +0000

Another exception under WebLogic server. This exception occurs because the default query factory class in persistence.xml is the org.hibernate.hql.ast.ASTQueryTranslatorFactory. As the name suggests this is a classpath issue. You might wondering why you get it since you have the hibernate jar file (the file that contains the HqlToken class) in your classpath. The reason is that the weblogic.jar contains a version of antlr.jar which is loaded by a classloader, while the hibernate stuff are loaded by another classloader. So when the server runs it’s using the version of antlr bundled with weblogic which cannot see the hibernate classes. There are two solutions to this problem

1) Use a

instead of a

in your persistence.xml. This will solve the problem but you will have additional issues if you use Enums as parameters to queries (like I do) since I found out the the ClassicQueryTranslatorFactory has problems translating Enum data types to parameters (instead it translates them as bytes, unless you pass the actual value itself and not the Enum object).

Add Hibernate’s antlr jar file as first entry in the classpath (in your startWeblogic script of your domain’s bin folder) and force weblogic to use this instead. I copied it into the common/lib folder and used

set CLASSPATH=%WL_HOME%\common\lib\antlr-2.7.6.jar;%SAVE_CLASSPATH%

There is another solution suggested, to add the following

    
        antlr.*

in your weblogic-application.xml, but for some reason this did not work for me.