java.lang.NoSuchMethodError: org.eclipse.core.runtime.IExtensionRegistry.getConfigurationElementsFor(Ljava/lang/String;)[Lorg/eclipse/core/runtime/IConfigurationElement;
   at com.ibm.ws.util.ClassResolverImpl.<clinit>(ClassResolverImpl.java:69)
   at java.lang.Class.forName0(Class.java:0)
   at java.lang.Class.forName(Class.java:169)
   at com.ibm.ws.util.WsObjectInputStream.<clinit>(WsObjectInputStream.java:106)
   at com.ibm.ws.management.connector.soap.GenericSerializer.unmarshall(GenericSerializer.java:219)
   at org.apache.soap.util.xml.XMLJavaMappingRegistry.unmarshall(XMLJavaMappingRegistry.java:0)
   at org.apache.soap.encoding.soapenc.ParameterSerializer.unmarshall(ParameterSerializer.java:0)
   at org.apache.soap.util.xml.XMLJavaMappingRegistry.unmarshall(XMLJavaMappingRegistry.java:0)
   at org.apache.soap.rpc.RPCMessage.unmarshall(RPCMessage.java:0)
   at org.apache.soap.rpc.RPCMessage.extractFromEnvelope(RPCMessage.java:0)
   at org.apache.soap.rpc.Response.extractFromEnvelope(Response.java:0)
   at org.apache.soap.rpc.Call.invoke(Call.java:0)
   at com.ibm.ws.management.connector.soap.SOAPConnectorClient$8.run(SOAPConnectorClient.java:705)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:125)
   at com.ibm.ws.management.connector.soap.SOAPConnectorClient.invokeTemplate(SOAPConnectorClient.java:698)
   at com.ibm.ws.management.connector.soap.SOAPConnectorClient.getServerMBean(SOAPConnectorClient.java:522)
   at com.ibm.ws.management.connector.soap.SOAPConnectorClient.invoke(SOAPConnectorClient.java:444)
   at $Proxy28.getServerMBean(.java:0)
   at com.ibm.ws.management.AdminClientImpl.getServerMBean(AdminClientImpl.java:108)
   at com.ibm.ws.management.application.j2ee.deploy.spi.DeploymentManagerImpl.connect(DeploymentManagerImpl.java:182)
   at com.ibm.ws.management.application.j2ee.deploy.spi.factories.DeploymentFactoryImpl.getDeploymentManager(DeploymentFactoryImpl.java:186)
   at org.netbeans.modules.j2ee.websphere6.WSDeploymentManager.updateDeploymentManager(WSDeploymentManager.java:445)
   at org.netbeans.modules.j2ee.websphere6.WSDeploymentManager.getTargets(WSDeploymentManager.java:934)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.getTargetMap(ServerInstance.java:558)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.getTargets(ServerInstance.java:516)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance._retrieveTarget(ServerInstance.java:1808)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.getDebugger(ServerInstance.java:973)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.isSuspended(ServerInstance.java:1022)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance$1.run(ServerInstance.java:388)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NoSuchMethodError: org.eclipse.core.runtime.IExtensionRegistry.getConfigurationElementsFor(Ljava/lang/String;)[Lorg/eclipse/core/runtime/IConfigurationElement;
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.refresh(ServerInstance.java:364)
   at org.netbeans.modules.j2ee.deployment.impl.bridge.BridgingServerInstance.getFullNode(BridgingServerInstance.java:106)
   at org.netbeans.api.server.ServerInstance.getFullNode(ServerInstance.java:102)
   at org.netbeans.modules.server.ui.node.RootNode$ChildFactory.createNodeForKey(RootNode.java:225)
   at org.netbeans.modules.server.ui.node.RootNode$ChildFactory.createNodeForKey(RootNode.java:168)
   at org.openide.nodes.ChildFactory.createNodesForKey(ChildFactory.java:120)
   at org.openide.nodes.AsynchChildren.createNodes(AsynchChildren.java:161)
   at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1654)
   at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:149)
   at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:943)
   at org.openide.nodes.EntrySupport$Default.updateAdd(EntrySupport.java:530)
   at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:367)
   at org.openide.nodes.EntrySupport.setEntries(EntrySupport.java:102)
   at org.openide.nodes.Children$Keys$2.run(Children.java:1548)
   at org.openide.util.Mutex$1Exec.run(Mutex.java:1244)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1913)
   at org.openide.util.Mutex.postRequest(Mutex.java:1250)
   at org.openide.util.Mutex.postRequest(Mutex.java:1213)
   at org.openide.util.Mutex.postWriteRequest(Mutex.java:585)
   at org.openide.nodes.Children$Keys.applyKeys(Children.java:1557)
   at org.openide.nodes.Children$Keys.setKeys(Children.java:1501)
   at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:194)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)