Sudah beberapa kali ketika saya ingin menggunakan SQL Developer, muncul error seperti berikut
java.lang.NullPointerException
at oracle.jdevimpl.vcs.svn.SVNProfile.canActivate(SVNProfile.java:162)
at oracle.jdevimpl.vcs.generic.GenericClient.fireCanActivate(GenericClient.java:1629)
at oracle.jdevimpl.vcs.generic.GenericClient.canActivate(GenericClient.java:237)
at oracle.jdevimpl.vcs.VCSManagerImpl$6.addinsLoaded(VCSManagerImpl.java:391)
at oracle.ide.IdeCore.fireIdeEvent(IdeCore.java:864)
at oracle.ide.IdeCore.access$100(IdeCore.java:136)
at oracle.ide.IdeCore$3.run(IdeCore.java:836)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:666)
at java.awt.EventQueue.access$400(EventQueue.java:81)
at java.awt.EventQueue$2.run(EventQueue.java:627)
at java.awt.EventQueue$2.run(EventQueue.java:625)
at java.security.AccessController.doPrivileged(Native Method)
saya coba googling dan menemukan solusi pemecahannya di oracle forum. solusinya adalah mematikan plugin Subversion. langsung saja ke menu Versioning - configure dan matikan Versioning support for Subversion. setelah itu restart SQL Developer dan error yg muncul akan segera hilang.
hope it helps. CTOA ~






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