Error when installing plugin in Eclipse

Question

When I try to install a plugin in Eclipse I get these error messages

Registry event dispatcher

Error notifying registry change listener.
Error notifying registry change listener.
Invalid registry object
Error notifying registry change listener.
Invalid registry object
Error notifying registry change listener.
Invalid registry object
Error notifying registry change listener.
Invalid registry object
Error notifying registry change listener.
Invalid registry object

Has someone an idea what the cause of this problem could be? Thanks

Edit:

I see the Eclipse .log file has also a lot of new stack traces

The first one is

java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=nl_NL
Framework arguments:  -product org.eclipse.epp.package.jee.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product

!ENTRY org.eclipse.equinox.registry 4 2 2010-05-06 21:04:31.236
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.equinox.registry".
!STACK 0
org.eclipse.core.runtime.InvalidRegistryObjectException: Invalid registry object
    at org.eclipse.core.internal.registry.TemporaryObjectManager.getObject(TemporaryObjectManager.java:98)
    at org.eclipse.core.internal.registry.BaseExtensionPointHandle.getExtensionPoint(BaseExtensionPointHandle.java:106)
    at org.eclipse.core.internal.registry.BaseExtensionPointHandle.getContributor(BaseExtensionPointHandle.java:45)
    at org.eclipse.core.internal.registry.BaseExtensionPointHandle.getNamespace(BaseExtensionPointHandle.java:37)
    at org.eclipse.ui.internal.PopupMenuExtender.registryChanged(PopupMenuExtender.java:520)
    at org.eclipse.core.internal.registry.ExtensionRegistry$2.run(ExtensionRegistry.java:921)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.registry.ExtensionRegistry.processChangeEvent(ExtensionRegistry.java:919)
    at org.eclipse.core.runtime.spi.RegistryStrategy.processChangeEvent(RegistryStrategy.java:260)
    at org.eclipse.core.internal.registry.osgi.ExtensionEventDispatcherJob.run(ExtensionEventDispatcherJob.java:50)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Edit2:

When I restart Eclipse I get a "install connectors" window, but when I select a connector and click on "Finish" nothing happens and there appears an "Unhandled event loop exception" in the Eclipse log

Edit3:

I tried Subclipse instead of Subversive but that gives these errors

Failed to load JavaHL Library.
These are the errors that were encountered:
no libapr-1 in java.library.path
no libapriconv-1 in java.library.path
C:\Program Files (x86)\Zend\Core\bin\libeay32.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
C:\Program Files (x86)\Zend\Core\bin\ssleay32.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
no libaprutil-1 in java.library.path
no libsvn_subr-1 in java.library.path
no libsvn_delta-1 in java.library.path
no libsvn_diff-1 in java.library.path
no libsvn_wc-1 in java.library.path
no libsvn_fs-1 in java.library.path
no libsvn_repos-1 in java.library.path
no libsvn_ra-1 in java.library.path
no libsvn_client-1 in java.library.path
no libsvnjavahl-1 in java.library.path
no svnjavahl-1 in java.library.path
no svnjavahl in java.library.path
java.library.path = C:\Windows\system32;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Zend\Core\bin;C:\Program Files (x86)\Zend\Core\oic;C:\Program Files (x86)\MySQL\MySQL Server 5.0\bin;C:\Program Files (x86)\Common Files\Acronis\SnapAPI\;C:\Program Files\TortoiseSVN\bin;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files\Java\jdk1.6.0_20\bin

Is there a possibility that the installed Eclipse version conflicts with another installed Eclipse version or with Zend Studio?

Answer 1

Did you observe that on a fresh installation of Eclipse?
And in the case of your instance of Eclipse, did you try to relaunch iot a second time? (and still see errors?)

Because when several plugins are already there, this thread mentions (for AJDT but that can be applied to other plugins as well):

The error means that somebody holds on to the handles to the extension registry objects that no longer exists.

Most likely AJDT (or one of the bundles it depends on) maintains persistent cache of registry objects, such as extensions or extension points.
When a bundle is updated, behind the scene the "old" version of the bundle is uninstalled, removing all its registry elements, and when the new version of the bundle is installed, adding new registry element.
If a bundle cached handles for extensions/extension points and did not react to the registry events, it ends up with invalid handles.

Answer 2

It's problem with x64 Java.

With x64 java you need to use JavaHL with x64 support

This is official FAQ http://subclipse.tigris.org/wiki/JavaHL#head-0ae839721445e3f59d10a128ec9439d4f4988d5f

I have same installation and it works after steps from FAQ