Coonection Refulsed error

[Sitraman Wills1]

Hi,
When I run the client and issue a create request I get a connection refused error. Any pointers on what the reason is and for fixing the issue would be appreciated.
log4j:ERROR Could not connect to remote log4j server at [localhost]. We will try again later.
INFO :: Hello KMIPClient! What a beatiful day;)
INFO :: KMIPStubTransportLayerHTTPS initialized...
INFO :: Connection to: https://localhost:8443/KMIPWebAppServer/KMIPServlet
INFO :: Load page "http://de.wikipedia.org/wiki/Key_Management_Interoperability_Protocol"
INFO :: Encoded Request from Client: (actual/expected)
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
INFO :: Request TTLV-Strings are the same!
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(Unknown Source)
at ch.ntb.inf.kmip.stub.transport.KMIPStubTransportLayerHTTPSLocalHost.executePost(KMIPStubTransportLayerHTTPSLocalHost.java:137)
at ch.ntb.inf.kmip.stub.transport.KMIPStubTransportLayerHTTPSLocalHost.send(KMIPStubTransportLayerHTTPSLocalHost.java:106)
at ch.ntb.inf.kmip.stub.KMIPStub.processRequest(KMIPStub.java:125)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.processRequest(KMIPClientGUIUseCaseViewer.java:190)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.actionPerformed(KMIPClientGUIUseCaseViewer.java:171)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
java.lang.NullPointerException
at ch.ntb.inf.kmip.utils.KMIPUtils.convertHexStringToArrayList(KMIPUtils.java:40)
at ch.ntb.inf.kmip.stub.transport.KMIPStubTransportLayerHTTPSLocalHost.send(KMIPStubTransportLayerHTTPSLocalHost.java:107)
at ch.ntb.inf.kmip.stub.KMIPStub.processRequest(KMIPStub.java:125)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.processRequest(KMIPClientGUIUseCaseViewer.java:190)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.actionPerformed(KMIPClientGUIUseCaseViewer.java:171)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
INFO :: Encoded Response from Server: (actual/expected)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at ch.ntb.inf.kmip.utils.KMIPUtils.convertArrayListToHexString(KMIPUtils.java:52)
at ch.ntb.inf.kmip.utils.KMIPUtils.printArrayListAsHexString(KMIPUtils.java:74)
at ch.ntb.inf.kmip.stub.KMIPStub.processRequest(KMIPStub.java:127)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.processRequest(KMIPClientGUIUseCaseViewer.java:190)
at ch.ntb.inf.kmip.client.gui.KMIPClientGUIUseCaseViewer.actionPerformed(KMIPClientGUIUseCaseViewer.java:171)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)</init>