diff --git a/instance/core/src/main/java/org/apache/karaf/instance/core/internal/InstanceServiceImpl.java b/instance/core/src/main/java/org/apache/karaf/instance/core/internal/InstanceServiceImpl.java
index 5c87c45..b4020c0 100644
--- a/instance/core/src/main/java/org/apache/karaf/instance/core/internal/InstanceServiceImpl.java
+++ b/instance/core/src/main/java/org/apache/karaf/instance/core/internal/InstanceServiceImpl.java
@@ -534,6 +534,10 @@ public class InstanceServiceImpl implements InstanceService {
     }
 
     public synchronized Instance cloneInstance(final String name, final String cloneName, final InstanceSettings settings, final boolean printOutput) throws Exception {
+        final int instanceSshPort = getInstanceSshPort(name);
+        final int instanceRmiRegistryPort = getInstanceRmiRegistryPort(name);
+        final int instanceRmiServerPort = getInstanceRmiServerPort(name);
+
         return execute(new Task<Instance>() {
             public Instance call(State state) throws IOException {
                 if (state.instances.get(cloneName) != null) {
@@ -561,11 +565,12 @@ public class InstanceServiceImpl implements InstanceService {
                 props.put(name, cloneName);
                 props.put(locationPath, cloneLocationPath);
                 if (settings.getSshPort() > 0)
-                    props.put(Integer.toString(getInstanceSshPort(instance.name)), Integer.toString(settings.getSshPort()));
+                    props.put(Integer.toString(instanceSshPort), Integer.toString(settings.getSshPort()));
                 if (settings.getRmiRegistryPort() > 0)
-                    props.put(Integer.toString(getInstanceRmiRegistryPort(instance.name)), Integer.toString(settings.getRmiRegistryPort()));
+                    props.put(Integer.toString(instanceRmiRegistryPort), Integer.toString(settings.getRmiRegistryPort()));
                 if (settings.getRmiServerPort() > 0)
-                    props.put(Integer.toString(getInstanceRmiServerPort(instance.name)), Integer.toString(settings.getRmiServerPort()));
+                    props.put(Integer.toString(instanceRmiServerPort), Integer.toString(settings.getRmiServerPort()));
+
                 // filtering clone files
                 filterResource(cloneLocation, "etc/custom.properties", props);
                 filterResource(cloneLocation, "etc/org.apache.karaf.management.cfg", props);
@@ -1108,4 +1113,4 @@ public class InstanceServiceImpl implements InstanceService {
         return val;
     }
 
-}
\ No newline at end of file
+}