diff --git a/generated/google/apis/tpu_v1alpha1.rb b/generated/google/apis/tpu_v1alpha1.rb
index eddd2f947..8df3f698c 100644
--- a/generated/google/apis/tpu_v1alpha1.rb
+++ b/generated/google/apis/tpu_v1alpha1.rb
@@ -25,7 +25,7 @@ module Google
     # @see https://cloud.google.com/tpu/
     module TpuV1alpha1
       VERSION = 'V1alpha1'
-      REVISION = '20190619'
+      REVISION = '20190821'
 
       # View and manage your data across Google Cloud Platform services
       AUTH_CLOUD_PLATFORM = 'https://www.googleapis.com/auth/cloud-platform'
diff --git a/generated/google/apis/tpu_v1alpha1/classes.rb b/generated/google/apis/tpu_v1alpha1/classes.rb
index c419bb42d..967fe9098 100644
--- a/generated/google/apis/tpu_v1alpha1/classes.rb
+++ b/generated/google/apis/tpu_v1alpha1/classes.rb
@@ -80,6 +80,11 @@ module Google
         # @return [String]
         attr_accessor :next_page_token
       
+        # Locations that could not be reached.
+        # Corresponds to the JSON property `unreachable`
+        # @return [Array<String>]
+        attr_accessor :unreachable
+      
         def initialize(**args)
            update!(**args)
         end
@@ -88,6 +93,7 @@ module Google
         def update!(**args)
           @accelerator_types = args[:accelerator_types] if args.key?(:accelerator_types)
           @next_page_token = args[:next_page_token] if args.key?(:next_page_token)
+          @unreachable = args[:unreachable] if args.key?(:unreachable)
         end
       end
       
@@ -186,6 +192,11 @@ module Google
         # @return [Array<Google::Apis::TpuV1alpha1::TensorFlowVersion>]
         attr_accessor :tensorflow_versions
       
+        # Locations that could not be reached.
+        # Corresponds to the JSON property `unreachable`
+        # @return [Array<String>]
+        attr_accessor :unreachable
+      
         def initialize(**args)
            update!(**args)
         end
@@ -194,6 +205,7 @@ module Google
         def update!(**args)
           @next_page_token = args[:next_page_token] if args.key?(:next_page_token)
           @tensorflow_versions = args[:tensorflow_versions] if args.key?(:tensorflow_versions)
+          @unreachable = args[:unreachable] if args.key?(:unreachable)
         end
       end
       
diff --git a/generated/google/apis/tpu_v1alpha1/representations.rb b/generated/google/apis/tpu_v1alpha1/representations.rb
index 514268ce7..4be024d07 100644
--- a/generated/google/apis/tpu_v1alpha1/representations.rb
+++ b/generated/google/apis/tpu_v1alpha1/representations.rb
@@ -150,6 +150,7 @@ module Google
           collection :accelerator_types, as: 'acceleratorTypes', class: Google::Apis::TpuV1alpha1::AcceleratorType, decorator: Google::Apis::TpuV1alpha1::AcceleratorType::Representation
       
           property :next_page_token, as: 'nextPageToken'
+          collection :unreachable, as: 'unreachable'
         end
       end
       
@@ -187,6 +188,7 @@ module Google
           property :next_page_token, as: 'nextPageToken'
           collection :tensorflow_versions, as: 'tensorflowVersions', class: Google::Apis::TpuV1alpha1::TensorFlowVersion, decorator: Google::Apis::TpuV1alpha1::TensorFlowVersion::Representation
       
+          collection :unreachable, as: 'unreachable'
         end
       end