Remko Weijnen's Blog (Remko's Blog)

About Virtualization, VDI, SBC, Application Compatibility and anything else I feel like

When starting a particular web based application Java popped up the following dialog:

Java has discovered application components that could indicate a security concern

The dialog asks us if we want to Block potentially unsafe components so to continue we should click no. However users tend to not really read such messages and click Yes which leads to this error:

Error connecting to Central Configuration


  • Filed under: Java
  • Today I was asked to assist in troubleshooting an Oracle Client (10g) installation. The installation halted very quickly with a java.lang.NullPointerException:



  • Filed under: Java, Oracle
  • Switch between Java Versions

    On a Citrix environment 2 different applications were required. One of the applications required java version 1.5 (and didn’t work with 1.6) and the other application needed specifically version 1.6.

    Because the applications are installed on a Citrix server the users do not have write permissions to HKEY_LOCAL_MACHINE so that was another complication.

    After a lot of monitoring with process monitor the general process of how a particular Java version loads in Internet Explorer became clear to me.

    Java adds an addon to IE called ssv.dll, you can see this trough Tools | Manage Add-ons | Enable or Disable Add-ons: