diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ApplyParametersRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ApplyParametersRequest.java
index d382a7f7..ae4a50c1 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ApplyParametersRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ApplyParametersRequest.java
@@ -105,6 +105,8 @@ private ApplyParametersRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/CreateInstanceRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/CreateInstanceRequest.java
index 735c63b0..9f0c7d4c 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/CreateInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/CreateInstanceRequest.java
@@ -112,6 +112,8 @@ private CreateInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/DeleteInstanceRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/DeleteInstanceRequest.java
index 12f80c49..6574a6a1 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/DeleteInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/DeleteInstanceRequest.java
@@ -88,6 +88,8 @@ private DeleteInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/GetInstanceRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/GetInstanceRequest.java
index c8f66a7b..decfa8ba 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/GetInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/GetInstanceRequest.java
@@ -88,6 +88,8 @@ private GetInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/Instance.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/Instance.java
index aa067797..969bb6ac 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/Instance.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/Instance.java
@@ -248,6 +248,8 @@ private Instance(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
@@ -594,6 +596,8 @@ private NodeConfig(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -1414,6 +1418,8 @@ private Node(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -3147,6 +3153,8 @@ private InstanceMessage(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -4122,7 +4130,7 @@ public int getLabelsCount() {
   @java.lang.Override
   public boolean containsLabels(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     return internalGetLabels().getMap().containsKey(key);
   }
@@ -4161,7 +4169,7 @@ public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
   @java.lang.Override
   public java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
     return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -4180,7 +4188,7 @@ public java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.Strin
   @java.lang.Override
   public java.lang.String getLabelsOrThrow(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
     if (!map.containsKey(key)) {
@@ -5888,7 +5896,7 @@ public int getLabelsCount() {
     @java.lang.Override
     public boolean containsLabels(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       return internalGetLabels().getMap().containsKey(key);
     }
@@ -5928,7 +5936,7 @@ public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
     public java.lang.String getLabelsOrDefault(
         java.lang.String key, java.lang.String defaultValue) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
       return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -5947,7 +5955,7 @@ public java.lang.String getLabelsOrDefault(
     @java.lang.Override
     public java.lang.String getLabelsOrThrow(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
       if (!map.containsKey(key)) {
@@ -5973,7 +5981,7 @@ public Builder clearLabels() {
      */
     public Builder removeLabels(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       internalGetMutableLabels().getMutableMap().remove(key);
       return this;
@@ -5996,11 +6004,12 @@ public java.util.Map<java.lang.String, java.lang.String> getMutableLabels() {
      */
     public Builder putLabels(java.lang.String key, java.lang.String value) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       if (value == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map value");
       }
+
       internalGetMutableLabels().getMutableMap().put(key, value);
       return this;
     }
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/InstanceOrBuilder.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/InstanceOrBuilder.java
index 05839bc9..928feb0a 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/InstanceOrBuilder.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/InstanceOrBuilder.java
@@ -137,7 +137,12 @@ public interface InstanceOrBuilder
    *
    * <code>map&lt;string, string&gt; labels = 3;</code>
    */
-  java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue);
+
+  /* nullable */
+  java.lang.String getLabelsOrDefault(
+      java.lang.String key,
+      /* nullable */
+      java.lang.String defaultValue);
   /**
    *
    *
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesRequest.java
index 506729ae..172a608b 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesRequest.java
@@ -117,6 +117,8 @@ private ListInstancesRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesResponse.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesResponse.java
index b5bde2c7..442d8f04 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesResponse.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/ListInstancesResponse.java
@@ -112,6 +112,8 @@ private ListInstancesResponse(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParameters.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParameters.java
index 2c860b1e..1b1eed01 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParameters.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParameters.java
@@ -94,6 +94,8 @@ private MemcacheParameters(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
@@ -220,7 +222,7 @@ public int getParamsCount() {
   @java.lang.Override
   public boolean containsParams(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     return internalGetParams().getMap().containsKey(key);
   }
@@ -255,7 +257,7 @@ public java.util.Map<java.lang.String, java.lang.String> getParamsMap() {
   @java.lang.Override
   public java.lang.String getParamsOrDefault(java.lang.String key, java.lang.String defaultValue) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
     return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -272,7 +274,7 @@ public java.lang.String getParamsOrDefault(java.lang.String key, java.lang.Strin
   @java.lang.Override
   public java.lang.String getParamsOrThrow(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
     if (!map.containsKey(key)) {
@@ -792,7 +794,7 @@ public int getParamsCount() {
     @java.lang.Override
     public boolean containsParams(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       return internalGetParams().getMap().containsKey(key);
     }
@@ -828,7 +830,7 @@ public java.util.Map<java.lang.String, java.lang.String> getParamsMap() {
     public java.lang.String getParamsOrDefault(
         java.lang.String key, java.lang.String defaultValue) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
       return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -845,7 +847,7 @@ public java.lang.String getParamsOrDefault(
     @java.lang.Override
     public java.lang.String getParamsOrThrow(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
       if (!map.containsKey(key)) {
@@ -869,7 +871,7 @@ public Builder clearParams() {
      */
     public Builder removeParams(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       internalGetMutableParams().getMutableMap().remove(key);
       return this;
@@ -890,11 +892,12 @@ public java.util.Map<java.lang.String, java.lang.String> getMutableParams() {
      */
     public Builder putParams(java.lang.String key, java.lang.String value) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       if (value == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map value");
       }
+
       internalGetMutableParams().getMutableMap().put(key, value);
       return this;
     }
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParametersOrBuilder.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParametersOrBuilder.java
index 6fb6549b..1deaaa58 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParametersOrBuilder.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/MemcacheParametersOrBuilder.java
@@ -96,7 +96,12 @@ public interface MemcacheParametersOrBuilder
    *
    * <code>map&lt;string, string&gt; params = 3;</code>
    */
-  java.lang.String getParamsOrDefault(java.lang.String key, java.lang.String defaultValue);
+
+  /* nullable */
+  java.lang.String getParamsOrDefault(
+      java.lang.String key,
+      /* nullable */
+      java.lang.String defaultValue);
   /**
    *
    *
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/OperationMetadata.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/OperationMetadata.java
index 65a50ebf..16236681 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/OperationMetadata.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/OperationMetadata.java
@@ -147,6 +147,8 @@ private OperationMetadata(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateInstanceRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateInstanceRequest.java
index 9d0153ae..5b6e9c54 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateInstanceRequest.java
@@ -110,6 +110,8 @@ private UpdateInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateParametersRequest.java b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateParametersRequest.java
index 7ee27f44..0d3e5de9 100644
--- a/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateParametersRequest.java
+++ b/proto-google-cloud-memcache-v1/src/main/java/com/google/cloud/memcache/v1/UpdateParametersRequest.java
@@ -119,6 +119,8 @@ private UpdateParametersRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplyParametersRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplyParametersRequest.java
index a6c986e4..ff3f8863 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplyParametersRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplyParametersRequest.java
@@ -105,6 +105,8 @@ private ApplyParametersRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplySoftwareUpdateRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplySoftwareUpdateRequest.java
index 23aae2a1..6eaa5601 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplySoftwareUpdateRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ApplySoftwareUpdateRequest.java
@@ -105,6 +105,8 @@ private ApplySoftwareUpdateRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/CreateInstanceRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/CreateInstanceRequest.java
index 6903111b..c4d8d0c8 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/CreateInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/CreateInstanceRequest.java
@@ -112,6 +112,8 @@ private CreateInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/DeleteInstanceRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/DeleteInstanceRequest.java
index 6e681019..9603a981 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/DeleteInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/DeleteInstanceRequest.java
@@ -88,6 +88,8 @@ private DeleteInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/GetInstanceRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/GetInstanceRequest.java
index 707b682a..ae6e7b72 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/GetInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/GetInstanceRequest.java
@@ -88,6 +88,8 @@ private GetInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/Instance.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/Instance.java
index e94a030a..61f82a41 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/Instance.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/Instance.java
@@ -263,6 +263,8 @@ private Instance(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
@@ -609,6 +611,8 @@ private NodeConfig(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -1448,6 +1452,8 @@ private Node(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -3271,6 +3277,8 @@ private InstanceMessage(
         }
       } catch (com.google.protobuf.InvalidProtocolBufferException e) {
         throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
       } catch (java.io.IOException e) {
         throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
       } finally {
@@ -4250,7 +4258,7 @@ public int getLabelsCount() {
   @java.lang.Override
   public boolean containsLabels(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     return internalGetLabels().getMap().containsKey(key);
   }
@@ -4289,7 +4297,7 @@ public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
   @java.lang.Override
   public java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
     return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -4308,7 +4316,7 @@ public java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.Strin
   @java.lang.Override
   public java.lang.String getLabelsOrThrow(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
     if (!map.containsKey(key)) {
@@ -6064,7 +6072,7 @@ public int getLabelsCount() {
     @java.lang.Override
     public boolean containsLabels(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       return internalGetLabels().getMap().containsKey(key);
     }
@@ -6104,7 +6112,7 @@ public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
     public java.lang.String getLabelsOrDefault(
         java.lang.String key, java.lang.String defaultValue) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
       return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -6123,7 +6131,7 @@ public java.lang.String getLabelsOrDefault(
     @java.lang.Override
     public java.lang.String getLabelsOrThrow(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetLabels().getMap();
       if (!map.containsKey(key)) {
@@ -6149,7 +6157,7 @@ public Builder clearLabels() {
      */
     public Builder removeLabels(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       internalGetMutableLabels().getMutableMap().remove(key);
       return this;
@@ -6172,11 +6180,12 @@ public java.util.Map<java.lang.String, java.lang.String> getMutableLabels() {
      */
     public Builder putLabels(java.lang.String key, java.lang.String value) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       if (value == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map value");
       }
+
       internalGetMutableLabels().getMutableMap().put(key, value);
       return this;
     }
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/InstanceOrBuilder.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/InstanceOrBuilder.java
index 0e843659..70d316ce 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/InstanceOrBuilder.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/InstanceOrBuilder.java
@@ -137,7 +137,12 @@ public interface InstanceOrBuilder
    *
    * <code>map&lt;string, string&gt; labels = 3;</code>
    */
-  java.lang.String getLabelsOrDefault(java.lang.String key, java.lang.String defaultValue);
+
+  /* nullable */
+  java.lang.String getLabelsOrDefault(
+      java.lang.String key,
+      /* nullable */
+      java.lang.String defaultValue);
   /**
    *
    *
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesRequest.java
index 9f1ce9e1..e9447e92 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesRequest.java
@@ -117,6 +117,8 @@ private ListInstancesRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesResponse.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesResponse.java
index c52a9e2e..83faa9b9 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesResponse.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ListInstancesResponse.java
@@ -112,6 +112,8 @@ private ListInstancesResponse(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadata.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadata.java
index 32a5d05c..775beafc 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadata.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadata.java
@@ -99,6 +99,8 @@ private LocationMetadata(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
@@ -183,7 +185,7 @@ public int getAvailableZonesCount() {
   @java.lang.Override
   public boolean containsAvailableZones(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     return internalGetAvailableZones().getMap().containsKey(key);
   }
@@ -229,7 +231,7 @@ public boolean containsAvailableZones(java.lang.String key) {
   public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrDefault(
       java.lang.String key, com.google.cloud.memcache.v1beta2.ZoneMetadata defaultValue) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, com.google.cloud.memcache.v1beta2.ZoneMetadata> map =
         internalGetAvailableZones().getMap();
@@ -252,7 +254,7 @@ public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrDefault
   public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrThrow(
       java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, com.google.cloud.memcache.v1beta2.ZoneMetadata> map =
         internalGetAvailableZones().getMap();
@@ -657,7 +659,7 @@ public int getAvailableZonesCount() {
     @java.lang.Override
     public boolean containsAvailableZones(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       return internalGetAvailableZones().getMap().containsKey(key);
     }
@@ -703,7 +705,7 @@ public boolean containsAvailableZones(java.lang.String key) {
     public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrDefault(
         java.lang.String key, com.google.cloud.memcache.v1beta2.ZoneMetadata defaultValue) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, com.google.cloud.memcache.v1beta2.ZoneMetadata> map =
           internalGetAvailableZones().getMap();
@@ -726,7 +728,7 @@ public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrDefault
     public com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrThrow(
         java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, com.google.cloud.memcache.v1beta2.ZoneMetadata> map =
           internalGetAvailableZones().getMap();
@@ -755,7 +757,7 @@ public Builder clearAvailableZones() {
      */
     public Builder removeAvailableZones(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       internalGetMutableAvailableZones().getMutableMap().remove(key);
       return this;
@@ -782,11 +784,12 @@ public Builder removeAvailableZones(java.lang.String key) {
     public Builder putAvailableZones(
         java.lang.String key, com.google.cloud.memcache.v1beta2.ZoneMetadata value) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       if (value == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map value");
       }
+
       internalGetMutableAvailableZones().getMutableMap().put(key, value);
       return this;
     }
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadataOrBuilder.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadataOrBuilder.java
index 3e6a0632..abceeea7 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadataOrBuilder.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/LocationMetadataOrBuilder.java
@@ -83,8 +83,12 @@ public interface LocationMetadataOrBuilder
    * map&lt;string, .google.cloud.memcache.v1beta2.ZoneMetadata&gt; available_zones = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];
    * </code>
    */
+
+  /* nullable */
   com.google.cloud.memcache.v1beta2.ZoneMetadata getAvailableZonesOrDefault(
-      java.lang.String key, com.google.cloud.memcache.v1beta2.ZoneMetadata defaultValue);
+      java.lang.String key,
+      /* nullable */
+      com.google.cloud.memcache.v1beta2.ZoneMetadata defaultValue);
   /**
    *
    *
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParameters.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParameters.java
index daa4eea2..f0bfb3c3 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParameters.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParameters.java
@@ -106,6 +106,8 @@ private MemcacheParameters(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
@@ -226,7 +228,7 @@ public int getParamsCount() {
   @java.lang.Override
   public boolean containsParams(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     return internalGetParams().getMap().containsKey(key);
   }
@@ -261,7 +263,7 @@ public java.util.Map<java.lang.String, java.lang.String> getParamsMap() {
   @java.lang.Override
   public java.lang.String getParamsOrDefault(java.lang.String key, java.lang.String defaultValue) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
     return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -278,7 +280,7 @@ public java.lang.String getParamsOrDefault(java.lang.String key, java.lang.Strin
   @java.lang.Override
   public java.lang.String getParamsOrThrow(java.lang.String key) {
     if (key == null) {
-      throw new java.lang.NullPointerException();
+      throw new NullPointerException("map key");
     }
     java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
     if (!map.containsKey(key)) {
@@ -796,7 +798,7 @@ public int getParamsCount() {
     @java.lang.Override
     public boolean containsParams(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       return internalGetParams().getMap().containsKey(key);
     }
@@ -832,7 +834,7 @@ public java.util.Map<java.lang.String, java.lang.String> getParamsMap() {
     public java.lang.String getParamsOrDefault(
         java.lang.String key, java.lang.String defaultValue) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
       return map.containsKey(key) ? map.get(key) : defaultValue;
@@ -849,7 +851,7 @@ public java.lang.String getParamsOrDefault(
     @java.lang.Override
     public java.lang.String getParamsOrThrow(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       java.util.Map<java.lang.String, java.lang.String> map = internalGetParams().getMap();
       if (!map.containsKey(key)) {
@@ -873,7 +875,7 @@ public Builder clearParams() {
      */
     public Builder removeParams(java.lang.String key) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       internalGetMutableParams().getMutableMap().remove(key);
       return this;
@@ -894,11 +896,12 @@ public java.util.Map<java.lang.String, java.lang.String> getMutableParams() {
      */
     public Builder putParams(java.lang.String key, java.lang.String value) {
       if (key == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map key");
       }
       if (value == null) {
-        throw new java.lang.NullPointerException();
+        throw new NullPointerException("map value");
       }
+
       internalGetMutableParams().getMutableMap().put(key, value);
       return this;
     }
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParametersOrBuilder.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParametersOrBuilder.java
index 56b8b086..91e20f76 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParametersOrBuilder.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/MemcacheParametersOrBuilder.java
@@ -90,7 +90,12 @@ public interface MemcacheParametersOrBuilder
    *
    * <code>map&lt;string, string&gt; params = 3;</code>
    */
-  java.lang.String getParamsOrDefault(java.lang.String key, java.lang.String defaultValue);
+
+  /* nullable */
+  java.lang.String getParamsOrDefault(
+      java.lang.String key,
+      /* nullable */
+      java.lang.String defaultValue);
   /**
    *
    *
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/OperationMetadata.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/OperationMetadata.java
index d2ceaf31..d3d4f3da 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/OperationMetadata.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/OperationMetadata.java
@@ -147,6 +147,8 @@ private OperationMetadata(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateInstanceRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateInstanceRequest.java
index dd40153b..a3f8920c 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateInstanceRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateInstanceRequest.java
@@ -110,6 +110,8 @@ private UpdateInstanceRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateParametersRequest.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateParametersRequest.java
index 6a686345..1466051b 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateParametersRequest.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/UpdateParametersRequest.java
@@ -120,6 +120,8 @@ private UpdateParametersRequest(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
diff --git a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ZoneMetadata.java b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ZoneMetadata.java
index e8ac3a66..dbf6a92a 100644
--- a/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ZoneMetadata.java
+++ b/proto-google-cloud-memcache-v1beta2/src/main/java/com/google/cloud/memcache/v1beta2/ZoneMetadata.java
@@ -71,6 +71,8 @@ private ZoneMetadata(
       }
     } catch (com.google.protobuf.InvalidProtocolBufferException e) {
       throw e.setUnfinishedMessage(this);
+    } catch (com.google.protobuf.UninitializedMessageException e) {
+      throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {