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JDeveloper 12c – Database Navigator Not Working

Darshu Y D-OracleJun 5 2025 — edited Jun 5 2025

Hi Team

I'm facing an issue with Oracle JDeveloper 12c where the Database Navigator is not functioning as expected.

Steps to Reproduce:

  • Launch JDeveloper 12c
  • Navigate to Window → Database
  • The Database Navigator window does not open & showing below screenshot error.

Could anyone guide me on how to troubleshoot or restore the Database Navigator functionality?
Is there a specific configuration, plugin, or workaround that needs to be done for this to work?

Terminal logs :

  1. org.openide.windows.WindowManager:Jun 03, 2025 2:42:38 PM org.openide.windows.WindowManager logThrowable

WARNING: [Winsys] TopComponent com.oracle.jdeveloper.nbwindowsystem.NbDockableContainer throws exception/error from its componentOpened() method.
Please repair it!
java.lang.NullPointerException
at oracle.dbtools.raptor.navigator.core.NavigatorUI.getTreeNodeSelectioFromUI(NavigatorUI.java:178)
2. Caused by:
java.lang.ClassNotFoundException: org.apache.http.client.ClientProtocolException cannot be found by oracle.dbtools.http_4.2.1
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:501)
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Added on Jun 5 2025
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