diff --git a/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcQuotaControllerStub.java b/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcQuotaControllerStub.java
index dd4891c5..ca9a8c43 100644
--- a/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcQuotaControllerStub.java
+++ b/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcQuotaControllerStub.java
@@ -132,7 +132,13 @@ public UnaryCallable<AllocateQuotaRequest, AllocateQuotaResponse> allocateQuotaC
 
   @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-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcServiceControllerStub.java b/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcServiceControllerStub.java
index dbdca68a..8feb0c88 100644
--- a/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcServiceControllerStub.java
+++ b/google-cloud-service-control/src/main/java/com/google/api/servicecontrol/v1/stub/GrpcServiceControllerStub.java
@@ -161,7 +161,13 @@ public UnaryCallable<ReportRequest, ReportResponse> reportCallable() {
 
   @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