diff --git a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcCatalogServiceStub.java b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcCatalogServiceStub.java
index 4622278d..68a821a0 100644
--- a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcCatalogServiceStub.java
+++ b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcCatalogServiceStub.java
@@ -350,7 +350,13 @@ public UnaryCallable<ImportCatalogItemsRequest, Operation> importCatalogItemsCal
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionApiKeyRegistryStub.java b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionApiKeyRegistryStub.java
index a7698912..0bc5107f 100644
--- a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionApiKeyRegistryStub.java
+++ b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionApiKeyRegistryStub.java
@@ -260,7 +260,13 @@ public GrpcOperationsStub getOperationsStub() {
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionServiceStub.java b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionServiceStub.java
index dbe409f1..eb620106 100644
--- a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionServiceStub.java
+++ b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcPredictionServiceStub.java
@@ -142,7 +142,13 @@ public UnaryCallable<PredictRequest, PredictPagedResponse> predictPagedCallable(
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override
diff --git a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcUserEventServiceStub.java b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcUserEventServiceStub.java
index c07cc5a0..3da2ec23 100644
--- a/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcUserEventServiceStub.java
+++ b/google-cloud-recommendations-ai/src/main/java/com/google/cloud/recommendationengine/v1beta1/stub/GrpcUserEventServiceStub.java
@@ -322,7 +322,13 @@ public UnaryCallable<ImportUserEventsRequest, Operation> importUserEventsCallabl
 
   @Override
   public final void close() {
-    shutdown();
+    try {
+      backgroundResources.close();
+    } catch (RuntimeException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new IllegalStateException("Failed to close resource", e);
+    }
   }
 
   @Override