killbill-memoizeit

diff --git a/subscription/src/main/java/org/killbill/billing/subscription/api/svcs/DefaultSubscriptionInternalApi.java b/subscription/src/main/java/org/killbill/billing/subscription/api/svcs/DefaultSubscriptionInternalApi.java
index b7092e1..27140ff 100644
--- a/subscription/src/main/java/org/killbill/billing/subscription/api/svcs/DefaultSubscriptionInternalApi.java
+++ b/subscription/src/main/java/org/killbill/billing/subscription/api/svcs/DefaultSubscriptionInternalApi.java
@@ -534,12 +534,15 @@ public class DefaultSubscriptionInternalApi extends SubscriptionApiBase implemen
         List<SubscriptionBaseEvent> dryRunEvents = null;
         try {
             final PlanPhaseSpecifier inputSpec = dryRunArguments.getPlanPhaseSpecifier();
+            final boolean isInputSpecNullOrEmpty = inputSpec == null ||
+                                                   (inputSpec.getPlanName() == null && inputSpec.getProductName() == null && inputSpec.getBillingPeriod() == null);
             final Catalog catalog = catalogService.getFullCatalog(true, true, context);
 
             // Create an overridesWithContext with a null context to indicate this is dryRun and no price overriden plan should be created.
             final PlanPhasePriceOverridesWithCallContext overridesWithContext = new DefaultPlanPhasePriceOverridesWithCallContext(dryRunArguments.getPlanPhasePriceOverrides(), null);
-            final Plan plan = inputSpec != null ?
-                              catalog.createOrFindPlan(inputSpec, overridesWithContext, utcNow) : null;
+            final Plan plan = isInputSpecNullOrEmpty ?
+                              null :
+                              catalog.createOrFindPlan(inputSpec, overridesWithContext, utcNow);
             final TenantContext tenantContext = internalCallContextFactory.createTenantContext(context);