diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/ClusterControllerClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/ClusterControllerClient.java
index e070013923ad..b9101f01916e 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/ClusterControllerClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/ClusterControllerClient.java
@@ -29,6 +29,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1.stub.ClusterControllerStub;
 import com.google.cloud.dataproc.v1.stub.ClusterControllerStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.longrunning.Operation;
 import com.google.longrunning.OperationsClient;
 import com.google.protobuf.Empty;
@@ -987,7 +988,8 @@ public static ApiFuture<ListClustersPagedResponse> createAsync(
             public ListClustersPagedResponse apply(ListClustersPage input) {
               return new ListClustersPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListClustersPagedResponse(ListClustersPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/JobControllerClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/JobControllerClient.java
index 555008e4fdb4..d3dd62db263d 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/JobControllerClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/JobControllerClient.java
@@ -27,6 +27,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1.stub.JobControllerStub;
 import com.google.cloud.dataproc.v1.stub.JobControllerStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.protobuf.Empty;
 import java.io.IOException;
 import java.util.List;
@@ -755,7 +756,8 @@ public static ApiFuture<ListJobsPagedResponse> createAsync(
             public ListJobsPagedResponse apply(ListJobsPage input) {
               return new ListJobsPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListJobsPagedResponse(ListJobsPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/WorkflowTemplateServiceClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/WorkflowTemplateServiceClient.java
index 56410542d18e..6910dfa5e5db 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/WorkflowTemplateServiceClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/WorkflowTemplateServiceClient.java
@@ -29,6 +29,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1.stub.WorkflowTemplateServiceStub;
 import com.google.cloud.dataproc.v1.stub.WorkflowTemplateServiceStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.longrunning.Operation;
 import com.google.longrunning.OperationsClient;
 import com.google.protobuf.Empty;
@@ -1232,7 +1233,8 @@ public static ApiFuture<ListWorkflowTemplatesPagedResponse> createAsync(
             public ListWorkflowTemplatesPagedResponse apply(ListWorkflowTemplatesPage input) {
               return new ListWorkflowTemplatesPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListWorkflowTemplatesPagedResponse(ListWorkflowTemplatesPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/ClusterControllerClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/ClusterControllerClient.java
index 693bd46f35c2..c0433f2cacce 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/ClusterControllerClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/ClusterControllerClient.java
@@ -29,6 +29,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1beta2.stub.ClusterControllerStub;
 import com.google.cloud.dataproc.v1beta2.stub.ClusterControllerStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.longrunning.Operation;
 import com.google.longrunning.OperationsClient;
 import com.google.protobuf.Empty;
@@ -991,7 +992,8 @@ public static ApiFuture<ListClustersPagedResponse> createAsync(
             public ListClustersPagedResponse apply(ListClustersPage input) {
               return new ListClustersPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListClustersPagedResponse(ListClustersPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/JobControllerClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/JobControllerClient.java
index 6899c213bf19..cbc7ee1d1cb7 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/JobControllerClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/JobControllerClient.java
@@ -27,6 +27,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1beta2.stub.JobControllerStub;
 import com.google.cloud.dataproc.v1beta2.stub.JobControllerStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.protobuf.Empty;
 import java.io.IOException;
 import java.util.List;
@@ -758,7 +759,8 @@ public static ApiFuture<ListJobsPagedResponse> createAsync(
             public ListJobsPagedResponse apply(ListJobsPage input) {
               return new ListJobsPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListJobsPagedResponse(ListJobsPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/WorkflowTemplateServiceClient.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/WorkflowTemplateServiceClient.java
index 64f9c5801c80..ef6683081b02 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/WorkflowTemplateServiceClient.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/WorkflowTemplateServiceClient.java
@@ -29,6 +29,7 @@
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1beta2.stub.WorkflowTemplateServiceStub;
 import com.google.cloud.dataproc.v1beta2.stub.WorkflowTemplateServiceStubSettings;
+import com.google.common.util.concurrent.MoreExecutors;
 import com.google.longrunning.Operation;
 import com.google.longrunning.OperationsClient;
 import com.google.protobuf.Empty;
@@ -1177,7 +1178,8 @@ public static ApiFuture<ListWorkflowTemplatesPagedResponse> createAsync(
             public ListWorkflowTemplatesPagedResponse apply(ListWorkflowTemplatesPage input) {
               return new ListWorkflowTemplatesPagedResponse(input);
             }
-          });
+          },
+          MoreExecutors.directExecutor());
     }
 
     private ListWorkflowTemplatesPagedResponse(ListWorkflowTemplatesPage page) {
diff --git a/google-cloud-clients/google-cloud-dataproc/synth.metadata b/google-cloud-clients/google-cloud-dataproc/synth.metadata
index ef0d3dcdbe16..451bf17b8513 100644
--- a/google-cloud-clients/google-cloud-dataproc/synth.metadata
+++ b/google-cloud-clients/google-cloud-dataproc/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-03-01T08:40:02.252998Z",
+  "updateTime": "2019-03-06T08:39:37.112446Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.14",
-        "dockerImage": "googleapis/artman@sha256:f3d61ae45abaeefb6be5f228cda22732c2f1b00fb687c79c4bd4f2c42bb1e1a7"
+        "version": "0.16.15",
+        "dockerImage": "googleapis/artman@sha256:9caadfa59d48224cba5f3217eb9d61a155b78ccf31e628abef385bc5b7ed3bd2"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "41d72d444fbe445f4da89e13be02078734fb7875",
-        "internalRef": "236230004"
+        "sha": "856117505ff9075b3e9c0b5674113667b6cf9e00",
+        "internalRef": "236931378"
       }
     }
   ],