Archive for February, 2014

How to install Java in Oracle Database – ORA-29538.

2014-02-15 1 comment

Recently, the developer met the following error message while trying to create a java object using SQL Developer:
ORA-29538: Java not installed

Well, first let’s check if the JVM components is really not installed in Oracle – verify installed components:

select comp_name, version, status from dba_registry;


to be double sure, we run another query which should return no rows:

select distinct owner,name from dba_source where lower(NAME)='dbms_java';

So, to install the JVM you should run (sys as sysdba) initjvm.sql located in $ORACLE_HOME\javavm\install:

Now, check if JVM was installed successfully:

select comp_name, version, status from dba_registry;


The problem solved 🙂


Enable multiple RDP connections per user in Windows Server 2012.

By default, Windows 2012 servers allow a single Remote Desktop session (exactly the same way as it was in Windows 2008).
If only one session is available and you take over another person’s live session, you may choose to enable multiple RDP sessions.

Below, you can find steps for enabling multiple sessions:
1. Open the start screen (press the Windows key) and type gpedit.msc and open it.
2. Go to Computer Configuration => Administrative Templates => Windows Components => Remote Desktop Services => Remote Desktop Session Host => Connections.
3. Set Restrict Remote Desktop Services user to a single Remote Desktop Services session to Disabled.
4. Double click Limit number of connections and set the RD Maximum Connections allowed to 999999 (maximum allowed).


Categories: MS Windows, OS Tags: , , ,

Desktop icons in Windows 2012 R2.

Here you can find my grumblings about desktop icons in Windows 2008R2.
Guess what? In Windows 2012R2 nothing really changed. Oh, wait – because it is the new version of Windows – adding desktop icons (My Computer for example) in Windows 2012R2 is even more complicated than before.
Anyway, first, you’ll have to go into Server Manager and under Manage, choose Add Roles and Features.

Then click Next on EVERY SCREEN until you get to the Features section, select Desktop Experience under User Interfaces and Infrastructure.

Once added, you will have to aprove installing other features required by Desktop Experience.

Then you need to reboot the server. That’s right! A reboot is required to add icons to your desktop.

Once you’ve rebooted the server, simply right-click on the Desktop and select Personalize. From here, you can add the desktop icons you desire as usual.

I’m speechless.