diff --git a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
index eb28aad02c..ec61d337d1 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfig.java
@@ -146,6 +146,8 @@ private AuditConfig(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
index b1f2b2dcbe..56e4b05863 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditConfigDelta.java
@@ -113,6 +113,8 @@ private AuditConfigDelta(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
index a6f3a720c2..0008387a00 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/AuditLogConfig.java
@@ -116,6 +116,8 @@ private AuditLogConfig(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
index 219872a2bc..cf06536c0f 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Binding.java
@@ -114,6 +114,8 @@ private Binding(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
index ed69378ddd..b6ef165322 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/BindingDelta.java
@@ -119,6 +119,8 @@ private BindingDelta(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
index 7944fffc7e..1a41603b08 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetIamPolicyRequest.java
@@ -103,6 +103,8 @@ private GetIamPolicyRequest(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
index 253fa54744..488dad2cc5 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/GetPolicyOptions.java
@@ -84,6 +84,8 @@ private GetPolicyOptions(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
index ac67ceeb08..db26b549fd 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/Policy.java
@@ -172,6 +172,8 @@ private Policy(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
index c26773e978..ed094c19ce 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/PolicyDelta.java
@@ -104,6 +104,8 @@ private PolicyDelta(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
index 69e7e674b0..3bf8dfa8c7 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/SetIamPolicyRequest.java
@@ -117,6 +117,8 @@ private SetIamPolicyRequest(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
index 5fdcc73197..7e4b65833b 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsRequest.java
@@ -100,6 +100,8 @@ private TestIamPermissionsRequest(
       }
     } 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/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
index 50400d5028..0aec2dfd04 100644
--- a/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
+++ b/java-iam/proto-google-iam-v1/src/main/java/com/google/iam/v1/TestIamPermissionsResponse.java
@@ -92,6 +92,8 @@ private TestIamPermissionsResponse(
       }
     } 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 {