diff --git a/google-cloud-shell/src/main/java/com/google/cloud/shell/v1/stub/GrpcCloudShellServiceStub.java b/google-cloud-shell/src/main/java/com/google/cloud/shell/v1/stub/GrpcCloudShellServiceStub.java
index f8a66626..46d64999 100644
--- a/google-cloud-shell/src/main/java/com/google/cloud/shell/v1/stub/GrpcCloudShellServiceStub.java
+++ b/google-cloud-shell/src/main/java/com/google/cloud/shell/v1/stub/GrpcCloudShellServiceStub.java
@@ -335,7 +335,13 @@ public UnaryCallable<RemovePublicKeyRequest, Operation> removePublicKeyCallable(
 
   @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