Merge pull request #7195 from soltanmm/winfix

Fix Python interop unit-tests on Windows
diff --git a/examples/python/helloworld/run_codegen.sh b/examples/python/helloworld/run_codegen.sh
index 42b58e5..34224e5 100755
--- a/examples/python/helloworld/run_codegen.sh
+++ b/examples/python/helloworld/run_codegen.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # Runs the protoc with gRPC plugin to generate protocol messages and gRPC stubs.
-protoc -I ../../protos --python_out=. --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_python_plugin` ../../protos/helloworld.proto
+python -m grpc.tools.protoc -I../../protos --python_out=. --grpc_python_out=. ../../protos/helloworld.proto
diff --git a/examples/python/route_guide/run_codegen.sh b/examples/python/route_guide/run_codegen.sh
index d9d56c2..a377a1a 100755
--- a/examples/python/route_guide/run_codegen.sh
+++ b/examples/python/route_guide/run_codegen.sh
@@ -29,4 +29,4 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # Runs the protoc with gRPC plugin to generate protocol messages and gRPC stubs.
-protoc -I ../../protos --python_out=. --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_python_plugin` ../../protos/route_guide.proto
+python -m grpc.tools.protoc -I../../protos --python_out=. --grpc_python_out=. ../../protos/route_guide.proto
diff --git a/package.json b/package.json
index 68a31d7..1fec9cb 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,6 @@
   "files": [
     "LICENSE",
     "src/node/README.md",
-    "src/node/health_check",
     "src/proto",
     "etc",
     "src/node/index.js",
diff --git a/src/core/lib/surface/channel.c b/src/core/lib/surface/channel.c
index 2cf6d88..6d2b1c4 100644
--- a/src/core/lib/surface/channel.c
+++ b/src/core/lib/surface/channel.c
@@ -81,7 +81,7 @@
   CHANNEL_FROM_CHANNEL_STACK(grpc_channel_stack_from_top_element(top_elem))
 
 /* the protobuf library will (by default) start warning at 100megs */
-#define DEFAULT_MAX_MESSAGE_LENGTH (100 * 1024 * 1024)
+#define DEFAULT_MAX_MESSAGE_LENGTH (4 * 1024 * 1024)
 
 static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg,
                             grpc_error *error);
diff --git a/src/node/health_check/LICENSE b/src/node/health_check/LICENSE
new file mode 100644
index 0000000..0209b57
--- /dev/null
+++ b/src/node/health_check/LICENSE
@@ -0,0 +1,28 @@
+Copyright 2015, Google Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/node/health_check/health.js b/src/node/health_check/health.js
index 5236683..64ba9fb 100644
--- a/src/node/health_check/health.js
+++ b/src/node/health_check/health.js
@@ -33,14 +33,12 @@
 
 'use strict';
 
-var grpc = require('../');
+var grpc = require('grpc');
 
 var _ = require('lodash');
 
-var health_proto = grpc.load(__dirname +
-    '/../../proto/grpc/health/v1/health.proto');
-
-var HealthClient = health_proto.grpc.health.v1.Health;
+var health_messages = require('./v1/health_pb');
+var health_service = require('./v1/health_grpc_pb');
 
 function HealthImplementation(statusMap) {
   this.statusMap = _.clone(statusMap);
@@ -51,17 +49,19 @@
 };
 
 HealthImplementation.prototype.check = function(call, callback){
-  var service = call.request.service;
+  var service = call.request.getService();
   var status = _.get(this.statusMap, service, null);
   if (status === null) {
     callback({code:grpc.status.NOT_FOUND});
   } else {
-    callback(null, {status: status});
+    var response = new health_messages.HealthCheckResponse();
+    response.setStatus(status);
+    callback(null, response);
   }
 };
 
 module.exports = {
-  Client: HealthClient,
-  service: HealthClient.service,
+  Client: health_service.HealthClient,
+  service: health_service.HealthService,
   Implementation: HealthImplementation
 };
diff --git a/src/node/health_check/node_modules/grpc.js b/src/node/health_check/node_modules/grpc.js
new file mode 100644
index 0000000..4216119
--- /dev/null
+++ b/src/node/health_check/node_modules/grpc.js
@@ -0,0 +1,37 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* This exists solely to allow the generated code to import the grpc module
+ * without using a relative path */
+
+module.exports = require('../..');
diff --git a/src/node/health_check/package.json b/src/node/health_check/package.json
new file mode 100644
index 0000000..ad65b31
--- /dev/null
+++ b/src/node/health_check/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "grpc-health-check",
+  "version": "0.16.0-dev",
+  "author": "Google Inc.",
+  "description": "Health check service for use with gRPC",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/grpc/grpc.git"
+  },
+  "bugs": "https://github.com/grpc/grpc/issues",
+  "contributors": [
+    {
+      "name": "Michael Lumish",
+      "email": "mlumish@google.com"
+    }
+  ],
+  "dependencies": {
+    "grpc": "^0.15.0",
+    "lodash": "^3.9.3",
+    "google-protobuf": "^3.0.0-alpha.5"
+  },
+  "files": {
+    "LICENSE",
+    "health.js",
+    "v1"
+  },
+  "main": "src/node/index.js",
+  "license": "BSD-3-Clause"
+}
diff --git a/src/node/health_check/v1/health_grpc_pb.js b/src/node/health_check/v1/health_grpc_pb.js
new file mode 100644
index 0000000..89bc304
--- /dev/null
+++ b/src/node/health_check/v1/health_grpc_pb.js
@@ -0,0 +1,74 @@
+// GENERATED CODE -- DO NOT EDIT!
+
+// Original file comments:
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+'use strict';
+var grpc = require('grpc');
+var v1_health_pb = require('../v1/health_pb.js');
+
+function serialize_HealthCheckRequest(arg) {
+  if (!(arg instanceof v1_health_pb.HealthCheckRequest)) {
+    throw new Error('Expected argument of type HealthCheckRequest');
+  }
+  return new Buffer(arg.serializeBinary());
+}
+
+function deserialize_HealthCheckRequest(buffer_arg) {
+  return v1_health_pb.HealthCheckRequest.deserializeBinary(new Uint8Array(buffer_arg));
+}
+
+function serialize_HealthCheckResponse(arg) {
+  if (!(arg instanceof v1_health_pb.HealthCheckResponse)) {
+    throw new Error('Expected argument of type HealthCheckResponse');
+  }
+  return new Buffer(arg.serializeBinary());
+}
+
+function deserialize_HealthCheckResponse(buffer_arg) {
+  return v1_health_pb.HealthCheckResponse.deserializeBinary(new Uint8Array(buffer_arg));
+}
+
+
+var HealthService = exports.HealthService = {
+  check: {
+    path: '/grpc.health.v1.Health/Check',
+    requestStream: false,
+    responseStream: false,
+    requestType: v1_health_pb.HealthCheckRequest,
+    responseType: v1_health_pb.HealthCheckResponse,
+    requestSerialize: serialize_HealthCheckRequest,
+    requestDeserialize: deserialize_HealthCheckRequest,
+    responseSerialize: serialize_HealthCheckResponse,
+    responseDeserialize: deserialize_HealthCheckResponse,
+  },
+};
+
+exports.HealthClient = grpc.makeGenericClientConstructor(HealthService);
diff --git a/src/node/health_check/v1/health_pb.js b/src/node/health_check/v1/health_pb.js
new file mode 100644
index 0000000..b36d47c
--- /dev/null
+++ b/src/node/health_check/v1/health_pb.js
@@ -0,0 +1,342 @@
+/**
+ * @fileoverview
+ * @enhanceable
+ * @public
+ */
+// GENERATED CODE -- DO NOT EDIT!
+
+var jspb = require('google-protobuf');
+var goog = jspb;
+var global = Function('return this')();
+
+goog.exportSymbol('proto.grpc.health.v1.HealthCheckRequest', null, global);
+goog.exportSymbol('proto.grpc.health.v1.HealthCheckResponse', null, global);
+goog.exportSymbol('proto.grpc.health.v1.HealthCheckResponse.ServingStatus', null, global);
+
+/**
+ * Generated by JsPbCodeGenerator.
+ * @param {Array=} opt_data Optional initial data array, typically from a
+ * server response, or constructed directly in Javascript. The array is used
+ * in place and becomes part of the constructed object. It is not cloned.
+ * If no data is provided, the constructed object will be empty, but still
+ * valid.
+ * @extends {jspb.Message}
+ * @constructor
+ */
+proto.grpc.health.v1.HealthCheckRequest = function(opt_data) {
+  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
+};
+goog.inherits(proto.grpc.health.v1.HealthCheckRequest, jspb.Message);
+if (goog.DEBUG && !COMPILED) {
+  proto.grpc.health.v1.HealthCheckRequest.displayName = 'proto.grpc.health.v1.HealthCheckRequest';
+}
+
+
+if (jspb.Message.GENERATE_TO_OBJECT) {
+/**
+ * Creates an object representation of this proto suitable for use in Soy templates.
+ * Field names that are reserved in JavaScript and will be renamed to pb_name.
+ * To access a reserved field use, foo.pb_<name>, eg, foo.pb_default.
+ * For the list of reserved names please see:
+ *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
+ * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
+ *     for transitional soy proto support: http://goto/soy-param-migration
+ * @return {!Object}
+ */
+proto.grpc.health.v1.HealthCheckRequest.prototype.toObject = function(opt_includeInstance) {
+  return proto.grpc.health.v1.HealthCheckRequest.toObject(opt_includeInstance, this);
+};
+
+
+/**
+ * Static version of the {@see toObject} method.
+ * @param {boolean|undefined} includeInstance Whether to include the JSPB
+ *     instance for transitional soy proto support:
+ *     http://goto/soy-param-migration
+ * @param {!proto.grpc.health.v1.HealthCheckRequest} msg The msg instance to transform.
+ * @return {!Object}
+ */
+proto.grpc.health.v1.HealthCheckRequest.toObject = function(includeInstance, msg) {
+  var f, obj = {
+    service: msg.getService()
+  };
+
+  if (includeInstance) {
+    obj.$jspbMessageInstance = msg;
+  }
+  return obj;
+};
+}
+
+
+/**
+ * Deserializes binary data (in protobuf wire format).
+ * @param {jspb.ByteSource} bytes The bytes to deserialize.
+ * @return {!proto.grpc.health.v1.HealthCheckRequest}
+ */
+proto.grpc.health.v1.HealthCheckRequest.deserializeBinary = function(bytes) {
+  var reader = new jspb.BinaryReader(bytes);
+  var msg = new proto.grpc.health.v1.HealthCheckRequest;
+  return proto.grpc.health.v1.HealthCheckRequest.deserializeBinaryFromReader(msg, reader);
+};
+
+
+/**
+ * Deserializes binary data (in protobuf wire format) from the
+ * given reader into the given message object.
+ * @param {!proto.grpc.health.v1.HealthCheckRequest} msg The message object to deserialize into.
+ * @param {!jspb.BinaryReader} reader The BinaryReader to use.
+ * @return {!proto.grpc.health.v1.HealthCheckRequest}
+ */
+proto.grpc.health.v1.HealthCheckRequest.deserializeBinaryFromReader = function(msg, reader) {
+  while (reader.nextField()) {
+    if (reader.isEndGroup()) {
+      break;
+    }
+    var field = reader.getFieldNumber();
+    switch (field) {
+    case 1:
+      var value = /** @type {string} */ (reader.readString());
+      msg.setService(value);
+      break;
+    default:
+      reader.skipField();
+      break;
+    }
+  }
+  return msg;
+};
+
+
+/**
+ * Class method variant: serializes the given message to binary data
+ * (in protobuf wire format), writing to the given BinaryWriter.
+ * @param {!proto.grpc.health.v1.HealthCheckRequest} message
+ * @param {!jspb.BinaryWriter} writer
+ */
+proto.grpc.health.v1.HealthCheckRequest.serializeBinaryToWriter = function(message, writer) {
+  message.serializeBinaryToWriter(writer);
+};
+
+
+/**
+ * Serializes the message to binary data (in protobuf wire format).
+ * @return {!Uint8Array}
+ */
+proto.grpc.health.v1.HealthCheckRequest.prototype.serializeBinary = function() {
+  var writer = new jspb.BinaryWriter();
+  this.serializeBinaryToWriter(writer);
+  return writer.getResultBuffer();
+};
+
+
+/**
+ * Serializes the message to binary data (in protobuf wire format),
+ * writing to the given BinaryWriter.
+ * @param {!jspb.BinaryWriter} writer
+ */
+proto.grpc.health.v1.HealthCheckRequest.prototype.serializeBinaryToWriter = function (writer) {
+  var f = undefined;
+  f = this.getService();
+  if (f.length > 0) {
+    writer.writeString(
+      1,
+      f
+    );
+  }
+};
+
+
+/**
+ * Creates a deep clone of this proto. No data is shared with the original.
+ * @return {!proto.grpc.health.v1.HealthCheckRequest} The clone.
+ */
+proto.grpc.health.v1.HealthCheckRequest.prototype.cloneMessage = function() {
+  return /** @type {!proto.grpc.health.v1.HealthCheckRequest} */ (jspb.Message.cloneMessage(this));
+};
+
+
+/**
+ * optional string service = 1;
+ * @return {string}
+ */
+proto.grpc.health.v1.HealthCheckRequest.prototype.getService = function() {
+  return /** @type {string} */ (jspb.Message.getFieldProto3(this, 1, ""));
+};
+
+
+/** @param {string} value  */
+proto.grpc.health.v1.HealthCheckRequest.prototype.setService = function(value) {
+  jspb.Message.setField(this, 1, value);
+};
+
+
+
+/**
+ * Generated by JsPbCodeGenerator.
+ * @param {Array=} opt_data Optional initial data array, typically from a
+ * server response, or constructed directly in Javascript. The array is used
+ * in place and becomes part of the constructed object. It is not cloned.
+ * If no data is provided, the constructed object will be empty, but still
+ * valid.
+ * @extends {jspb.Message}
+ * @constructor
+ */
+proto.grpc.health.v1.HealthCheckResponse = function(opt_data) {
+  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
+};
+goog.inherits(proto.grpc.health.v1.HealthCheckResponse, jspb.Message);
+if (goog.DEBUG && !COMPILED) {
+  proto.grpc.health.v1.HealthCheckResponse.displayName = 'proto.grpc.health.v1.HealthCheckResponse';
+}
+
+
+if (jspb.Message.GENERATE_TO_OBJECT) {
+/**
+ * Creates an object representation of this proto suitable for use in Soy templates.
+ * Field names that are reserved in JavaScript and will be renamed to pb_name.
+ * To access a reserved field use, foo.pb_<name>, eg, foo.pb_default.
+ * For the list of reserved names please see:
+ *     com.google.apps.jspb.JsClassTemplate.JS_RESERVED_WORDS.
+ * @param {boolean=} opt_includeInstance Whether to include the JSPB instance
+ *     for transitional soy proto support: http://goto/soy-param-migration
+ * @return {!Object}
+ */
+proto.grpc.health.v1.HealthCheckResponse.prototype.toObject = function(opt_includeInstance) {
+  return proto.grpc.health.v1.HealthCheckResponse.toObject(opt_includeInstance, this);
+};
+
+
+/**
+ * Static version of the {@see toObject} method.
+ * @param {boolean|undefined} includeInstance Whether to include the JSPB
+ *     instance for transitional soy proto support:
+ *     http://goto/soy-param-migration
+ * @param {!proto.grpc.health.v1.HealthCheckResponse} msg The msg instance to transform.
+ * @return {!Object}
+ */
+proto.grpc.health.v1.HealthCheckResponse.toObject = function(includeInstance, msg) {
+  var f, obj = {
+    status: msg.getStatus()
+  };
+
+  if (includeInstance) {
+    obj.$jspbMessageInstance = msg;
+  }
+  return obj;
+};
+}
+
+
+/**
+ * Deserializes binary data (in protobuf wire format).
+ * @param {jspb.ByteSource} bytes The bytes to deserialize.
+ * @return {!proto.grpc.health.v1.HealthCheckResponse}
+ */
+proto.grpc.health.v1.HealthCheckResponse.deserializeBinary = function(bytes) {
+  var reader = new jspb.BinaryReader(bytes);
+  var msg = new proto.grpc.health.v1.HealthCheckResponse;
+  return proto.grpc.health.v1.HealthCheckResponse.deserializeBinaryFromReader(msg, reader);
+};
+
+
+/**
+ * Deserializes binary data (in protobuf wire format) from the
+ * given reader into the given message object.
+ * @param {!proto.grpc.health.v1.HealthCheckResponse} msg The message object to deserialize into.
+ * @param {!jspb.BinaryReader} reader The BinaryReader to use.
+ * @return {!proto.grpc.health.v1.HealthCheckResponse}
+ */
+proto.grpc.health.v1.HealthCheckResponse.deserializeBinaryFromReader = function(msg, reader) {
+  while (reader.nextField()) {
+    if (reader.isEndGroup()) {
+      break;
+    }
+    var field = reader.getFieldNumber();
+    switch (field) {
+    case 1:
+      var value = /** @type {!proto.grpc.health.v1.HealthCheckResponse.ServingStatus} */ (reader.readEnum());
+      msg.setStatus(value);
+      break;
+    default:
+      reader.skipField();
+      break;
+    }
+  }
+  return msg;
+};
+
+
+/**
+ * Class method variant: serializes the given message to binary data
+ * (in protobuf wire format), writing to the given BinaryWriter.
+ * @param {!proto.grpc.health.v1.HealthCheckResponse} message
+ * @param {!jspb.BinaryWriter} writer
+ */
+proto.grpc.health.v1.HealthCheckResponse.serializeBinaryToWriter = function(message, writer) {
+  message.serializeBinaryToWriter(writer);
+};
+
+
+/**
+ * Serializes the message to binary data (in protobuf wire format).
+ * @return {!Uint8Array}
+ */
+proto.grpc.health.v1.HealthCheckResponse.prototype.serializeBinary = function() {
+  var writer = new jspb.BinaryWriter();
+  this.serializeBinaryToWriter(writer);
+  return writer.getResultBuffer();
+};
+
+
+/**
+ * Serializes the message to binary data (in protobuf wire format),
+ * writing to the given BinaryWriter.
+ * @param {!jspb.BinaryWriter} writer
+ */
+proto.grpc.health.v1.HealthCheckResponse.prototype.serializeBinaryToWriter = function (writer) {
+  var f = undefined;
+  f = this.getStatus();
+  if (f !== 0.0) {
+    writer.writeEnum(
+      1,
+      f
+    );
+  }
+};
+
+
+/**
+ * Creates a deep clone of this proto. No data is shared with the original.
+ * @return {!proto.grpc.health.v1.HealthCheckResponse} The clone.
+ */
+proto.grpc.health.v1.HealthCheckResponse.prototype.cloneMessage = function() {
+  return /** @type {!proto.grpc.health.v1.HealthCheckResponse} */ (jspb.Message.cloneMessage(this));
+};
+
+
+/**
+ * optional ServingStatus status = 1;
+ * @return {!proto.grpc.health.v1.HealthCheckResponse.ServingStatus}
+ */
+proto.grpc.health.v1.HealthCheckResponse.prototype.getStatus = function() {
+  return /** @type {!proto.grpc.health.v1.HealthCheckResponse.ServingStatus} */ (jspb.Message.getFieldProto3(this, 1, 0));
+};
+
+
+/** @param {!proto.grpc.health.v1.HealthCheckResponse.ServingStatus} value  */
+proto.grpc.health.v1.HealthCheckResponse.prototype.setStatus = function(value) {
+  jspb.Message.setField(this, 1, value);
+};
+
+
+/**
+ * @enum {number}
+ */
+proto.grpc.health.v1.HealthCheckResponse.ServingStatus = {
+  UNKNOWN: 0,
+  SERVING: 1,
+  NOT_SERVING: 2
+};
+
+goog.object.extend(exports, proto.grpc.health.v1);
diff --git a/src/node/test/health_test.js b/src/node/test/health_test.js
index c93b528..efbca46 100644
--- a/src/node/test/health_test.js
+++ b/src/node/test/health_test.js
@@ -35,15 +35,19 @@
 
 var assert = require('assert');
 
-var health = require('../health_check/health.js');
+var health = require('../health_check/health');
+
+var health_messages = require('../health_check/v1/health_pb');
+
+var ServingStatus = health_messages.HealthCheckResponse.ServingStatus;
 
 var grpc = require('../');
 
 describe('Health Checking', function() {
   var statusMap = {
-    '': 'SERVING',
-    'grpc.test.TestServiceNotServing': 'NOT_SERVING',
-    'grpc.test.TestServiceServing': 'SERVING'
+    '': ServingStatus.SERVING,
+    'grpc.test.TestServiceNotServing': ServingStatus.NOT_SERVING,
+    'grpc.test.TestServiceServing': ServingStatus.SERVING
   };
   var healthServer;
   var healthImpl;
@@ -51,7 +55,7 @@
   before(function() {
     healthServer = new grpc.Server();
     healthImpl = new health.Implementation(statusMap);
-    healthServer.addProtoService(health.service, healthImpl);
+    healthServer.addService(health.service, healthImpl);
     var port_num = healthServer.bind('0.0.0.0:0',
                                      grpc.ServerCredentials.createInsecure());
     healthServer.start();
@@ -62,43 +66,51 @@
     healthServer.forceShutdown();
   });
   it('should say an enabled service is SERVING', function(done) {
-    healthClient.check({service: ''}, function(err, response) {
+    var request = new health_messages.HealthCheckRequest();
+    request.setService('');
+    healthClient.check(request, function(err, response) {
       assert.ifError(err);
-      assert.strictEqual(response.status, 'SERVING');
+      assert.strictEqual(response.getStatus(), ServingStatus.SERVING);
       done();
     });
   });
   it('should say that a disabled service is NOT_SERVING', function(done) {
-    healthClient.check({service: 'grpc.test.TestServiceNotServing'},
-                       function(err, response) {
-                         assert.ifError(err);
-                         assert.strictEqual(response.status, 'NOT_SERVING');
-                         done();
-                       });
+    var request = new health_messages.HealthCheckRequest();
+    request.setService('grpc.test.TestServiceNotServing');
+    healthClient.check(request, function(err, response) {
+      assert.ifError(err);
+      assert.strictEqual(response.getStatus(), ServingStatus.NOT_SERVING);
+      done();
+    });
   });
   it('should say that an enabled service is SERVING', function(done) {
-    healthClient.check({service: 'grpc.test.TestServiceServing'},
-                       function(err, response) {
-                         assert.ifError(err);
-                         assert.strictEqual(response.status, 'SERVING');
-                         done();
-                       });
+    var request = new health_messages.HealthCheckRequest();
+    request.setService('grpc.test.TestServiceServing');
+    healthClient.check(request, function(err, response) {
+      assert.ifError(err);
+      assert.strictEqual(response.getStatus(), ServingStatus.SERVING);
+      done();
+    });
   });
   it('should get NOT_FOUND if the service is not registered', function(done) {
-    healthClient.check({service: 'not_registered'}, function(err, response) {
+    var request = new health_messages.HealthCheckRequest();
+    request.setService('not_registered');
+    healthClient.check(request, function(err, response) {
       assert(err);
       assert.strictEqual(err.code, grpc.status.NOT_FOUND);
       done();
     });
   });
   it('should get a different response if the status changes', function(done) {
-    healthClient.check({service: 'transient'}, function(err, response) {
+    var request = new health_messages.HealthCheckRequest();
+    request.setService('transient');
+    healthClient.check(request, function(err, response) {
       assert(err);
       assert.strictEqual(err.code, grpc.status.NOT_FOUND);
-      healthImpl.setStatus('transient', 'SERVING');
-      healthClient.check({service: 'transient'}, function(err, response) {
+      healthImpl.setStatus('transient', ServingStatus.SERVING);
+      healthClient.check(request, function(err, response) {
         assert.ifError(err);
-        assert.strictEqual(response.status, 'SERVING');
+        assert.strictEqual(response.getStatus(), ServingStatus.SERVING);
         done();
       });
     });
diff --git a/src/python/grpcio/grpc/__init__.py b/src/python/grpcio/grpc/__init__.py
index b3eeaad..0efd233 100644
--- a/src/python/grpcio/grpc/__init__.py
+++ b/src/python/grpcio/grpc/__init__.py
@@ -1091,37 +1091,41 @@
       _auth.AccessTokenCallCredentials(access_token))
 
 
-def composite_call_credentials(call_credentials, additional_call_credentials):
-  """Compose two CallCredentials to make a new one.
+def composite_call_credentials(*call_credentials):
+  """Compose multiple CallCredentials to make a new CallCredentials.
 
   Args:
-    call_credentials: A CallCredentials object.
-    additional_call_credentials: Another CallCredentials object to compose on
-      top of call_credentials.
+    *call_credentials: At least two CallCredentials objects.
 
   Returns:
-    A new CallCredentials composed of the two given CallCredentials.
+    A CallCredentials object composed of the given CallCredentials objects.
   """
+  from grpc import _credential_composition
+  cygrpc_call_credentials = tuple(
+      single_call_credentials._credentials
+      for single_call_credentials in call_credentials)
   return CallCredentials(
-      _cygrpc.call_credentials_composite(
-          call_credentials._credentials,
-          additional_call_credentials._credentials))
+      _credential_composition.call(cygrpc_call_credentials))
 
 
-def composite_channel_credentials(channel_credentials, call_credentials):
-  """Compose a ChannelCredentials and a CallCredentials.
+def composite_channel_credentials(channel_credentials, *call_credentials):
+  """Compose a ChannelCredentials and one or more CallCredentials objects.
 
   Args:
     channel_credentials: A ChannelCredentials.
-    call_credentials: A CallCredentials.
+    *call_credentials: One or more CallCredentials objects.
 
   Returns:
     A ChannelCredentials composed of the given ChannelCredentials and
-      CallCredentials.
+      CallCredentials objects.
   """
+  from grpc import _credential_composition
+  cygrpc_call_credentials = tuple(
+      single_call_credentials._credentials
+      for single_call_credentials in call_credentials)
   return ChannelCredentials(
-      _cygrpc.channel_credentials_composite(
-          channel_credentials._credentials, call_credentials._credentials))
+      _credential_composition.channel(
+          channel_credentials._credentials, cygrpc_call_credentials))
 
 
 def ssl_server_credentials(
diff --git a/src/python/grpcio/grpc/_credential_composition.py b/src/python/grpcio/grpc/_credential_composition.py
new file mode 100644
index 0000000..9cb5508
--- /dev/null
+++ b/src/python/grpcio/grpc/_credential_composition.py
@@ -0,0 +1,48 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from grpc._cython import cygrpc
+
+
+def _call(call_credentialses):
+  call_credentials_iterator = iter(call_credentialses)
+  composition = next(call_credentials_iterator)
+  for additional_call_credentials in call_credentials_iterator:
+    composition = cygrpc.call_credentials_composite(
+        composition, additional_call_credentials)
+  return composition
+
+
+def call(call_credentialses):
+  return _call(call_credentialses)
+
+
+def channel(channel_credentials, call_credentialses):
+  return cygrpc.channel_credentials_composite(
+      channel_credentials, _call(call_credentialses))
diff --git a/src/python/grpcio/grpc/beta/_client_adaptations.py b/src/python/grpcio/grpc/beta/_client_adaptations.py
index 56456cc..73415e0 100644
--- a/src/python/grpcio/grpc/beta/_client_adaptations.py
+++ b/src/python/grpcio/grpc/beta/_client_adaptations.py
@@ -117,7 +117,10 @@
   def exception(self, timeout=None):
     try:
       rpc_error_call = self._future.exception(timeout=timeout)
-      return _abortion_error(rpc_error_call)
+      if rpc_error_call is None:
+        return None
+      else:
+        return _abortion_error(rpc_error_call)
     except grpc.FutureTimeoutError:
       raise future.TimeoutError()
     except grpc.FutureCancelledError:
diff --git a/src/python/grpcio_tests/tests/qps/benchmark_client.py b/src/python/grpcio_tests/tests/qps/benchmark_client.py
index 0802814..83b46c9 100644
--- a/src/python/grpcio_tests/tests/qps/benchmark_client.py
+++ b/src/python/grpcio_tests/tests/qps/benchmark_client.py
@@ -37,16 +37,23 @@
 from six.moves import queue
 
 import grpc
-from grpc.beta import implementations
-from grpc.framework.interfaces.face import face
 from src.proto.grpc.testing import messages_pb2
 from src.proto.grpc.testing import services_pb2
 from tests.unit import resources
-from tests.unit.beta import test_utilities
+from tests.unit import test_common
 
 _TIMEOUT = 60 * 60 * 24
 
 
+class GenericStub(object):
+
+  def __init__(self, channel):
+    self.UnaryCall = channel.unary_unary(
+        '/grpc.testing.BenchmarkService/UnaryCall')
+    self.StreamingCall = channel.stream_stream(
+        '/grpc.testing.BenchmarkService/StreamingCall')
+
+
 class BenchmarkClient:
   """Benchmark client interface that exposes a non-blocking send_request()."""
 
@@ -54,15 +61,12 @@
 
   def __init__(self, server, config, hist):
     # Create the stub
-    host, port = server.split(':')
-    port = int(port)
     if config.HasField('security_params'):
-      creds = implementations.ssl_channel_credentials(
-          resources.test_root_certificates())
-      channel = test_utilities.not_really_secure_channel(
-          host, port, creds, config.security_params.server_host_override)
+      creds = grpc.ssl_channel_credentials(resources.test_root_certificates())
+      channel = test_common.test_secure_channel(
+        server, creds, config.security_params.server_host_override)
     else:
-      channel = implementations.insecure_channel(host, port)
+      channel = grpc.insecure_channel(server)
 
     connected_event = threading.Event()
     def wait_for_ready(connectivity):
@@ -73,7 +77,7 @@
 
     if config.payload_config.WhichOneof('payload') == 'simple_params':
       self._generic = False
-      self._stub = services_pb2.beta_create_BenchmarkService_stub(channel)
+      self._stub = services_pb2.BenchmarkServiceStub(channel)
       payload = messages_pb2.Payload(
           body='\0' * config.payload_config.simple_params.req_size)
       self._request = messages_pb2.SimpleRequest(
@@ -81,7 +85,7 @@
           response_size=config.payload_config.simple_params.resp_size)
     else:
       self._generic = True
-      self._stub = implementations.generic_stub(channel)
+      self._stub = GenericStub(channel)
       self._request = '\0' * config.payload_config.bytebuf_params.req_size
 
     self._hist = hist
@@ -166,13 +170,8 @@
 
   def start(self):
     self._is_streaming = True
-    if self._generic:
-      stream_callable = self._stub.stream_stream(
-          'grpc.testing.BenchmarkService', 'StreamingCall')
-    else:
-      stream_callable = self._stub.StreamingCall
-
-    response_stream = stream_callable(self._request_generator(), _TIMEOUT)
+    response_stream = self._stub.StreamingCall(
+        self._request_generator(), _TIMEOUT)
     for _ in response_stream:
       self._handle_response(
           self, time.time() - self._send_time_queue.get_nowait())
diff --git a/src/python/grpcio_tests/tests/qps/benchmark_server.py b/src/python/grpcio_tests/tests/qps/benchmark_server.py
index 8cbf480..2b76b81 100644
--- a/src/python/grpcio_tests/tests/qps/benchmark_server.py
+++ b/src/python/grpcio_tests/tests/qps/benchmark_server.py
@@ -31,7 +31,7 @@
 from src.proto.grpc.testing import services_pb2
 
 
-class BenchmarkServer(services_pb2.BetaBenchmarkServiceServicer):
+class BenchmarkServer(services_pb2.BenchmarkServiceServicer):
   """Synchronous Server implementation for the Benchmark service."""
 
   def UnaryCall(self, request, context):
@@ -44,7 +44,7 @@
       yield messages_pb2.SimpleResponse(payload=payload)
 
 
-class GenericBenchmarkServer(services_pb2.BetaBenchmarkServiceServicer):
+class GenericBenchmarkServer(services_pb2.BenchmarkServiceServicer):
   """Generic Server implementation for the Benchmark service."""
 
   def __init__(self, resp_size):
diff --git a/src/python/grpcio_tests/tests/qps/qps_worker.py b/src/python/grpcio_tests/tests/qps/qps_worker.py
index 1692637..3abf0d0 100644
--- a/src/python/grpcio_tests/tests/qps/qps_worker.py
+++ b/src/python/grpcio_tests/tests/qps/qps_worker.py
@@ -32,18 +32,21 @@
 import argparse
 import time
 
+from concurrent import futures
+import grpc
 from src.proto.grpc.testing import services_pb2
 
 from tests.qps import worker_server
 
 
 def run_worker_server(port):
+  server = grpc.server((), futures.ThreadPoolExecutor(max_workers=5))
   servicer = worker_server.WorkerServer()
-  server = services_pb2.beta_create_WorkerService_server(servicer)
+  services_pb2.add_WorkerServiceServicer_to_server(servicer, server)
   server.add_insecure_port('[::]:{}'.format(port))
   server.start()
   servicer.wait_for_quit()
-  server.stop(2)
+  server.stop(0)
 
 
 if __name__ == '__main__':
diff --git a/src/python/grpcio_tests/tests/qps/worker_server.py b/src/python/grpcio_tests/tests/qps/worker_server.py
index d41f837..932a1ff 100644
--- a/src/python/grpcio_tests/tests/qps/worker_server.py
+++ b/src/python/grpcio_tests/tests/qps/worker_server.py
@@ -32,8 +32,8 @@
 import threading
 import time
 
-from grpc.beta import implementations
-from grpc.framework.interfaces.face import utilities
+from concurrent import futures
+import grpc
 from src.proto.grpc.testing import control_pb2
 from src.proto.grpc.testing import services_pb2
 from src.proto.grpc.testing import stats_pb2
@@ -45,7 +45,7 @@
 from tests.unit import resources
 
 
-class WorkerServer(services_pb2.BetaWorkerServiceServicer):
+class WorkerServer(services_pb2.WorkerServiceServicer):
   """Python Worker Server implementation."""
 
   def __init__(self):
@@ -65,7 +65,7 @@
       if request.mark.reset:
         start_time = end_time
       yield status
-    server.stop(0)
+    server.stop(None)
 
   def _get_server_status(self, start_time, end_time, port, cores):
     end_time = time.time()
@@ -76,25 +76,35 @@
     return control_pb2.ServerStatus(stats=stats, port=port, cores=cores)
 
   def _create_server(self, config):
-    if config.server_type == control_pb2.SYNC_SERVER:
+    if config.async_server_threads == 0:
+      # This is the default concurrent.futures thread pool size, but
+      # None doesn't seem to work
+      server_threads = multiprocessing.cpu_count() * 5
+    else:
+      server_threads = config.async_server_threads
+    server = grpc.server((), futures.ThreadPoolExecutor(
+        max_workers=server_threads))
+    if config.server_type == control_pb2.ASYNC_SERVER:
       servicer = benchmark_server.BenchmarkServer()
-      server = services_pb2.beta_create_BenchmarkService_server(servicer)
+      services_pb2.add_BenchmarkServiceServicer_to_server(servicer, server)
     elif config.server_type == control_pb2.ASYNC_GENERIC_SERVER:
       resp_size = config.payload_config.bytebuf_params.resp_size
       servicer = benchmark_server.GenericBenchmarkServer(resp_size)
       method_implementations = {
-          ('grpc.testing.BenchmarkService', 'StreamingCall'):
-          utilities.stream_stream_inline(servicer.StreamingCall),
-          ('grpc.testing.BenchmarkService', 'UnaryCall'):
-          utilities.unary_unary_inline(servicer.UnaryCall),
+          'StreamingCall':
+          grpc.stream_stream_rpc_method_handler(servicer.StreamingCall),
+          'UnaryCall':
+          grpc.unary_unary_rpc_method_handler(servicer.UnaryCall),
       }
-      server = implementations.server(method_implementations)
+      handler = grpc.method_handlers_generic_handler(
+          'grpc.testing.BenchmarkService', method_implementations)
+      server.add_generic_rpc_handlers((handler,))
     else:
       raise Exception('Unsupported server type {}'.format(config.server_type))
 
     if config.HasField('security_params'):  # Use SSL
-      server_creds = implementations.ssl_server_credentials([(
-          resources.private_key(), resources.certificate_chain())])
+      server_creds = grpc.ssl_server_credentials(
+          ((resources.private_key(), resources.certificate_chain()),))
       port = server.add_secure_port('[::]:{}'.format(config.port), server_creds)
     else:
       port = server.add_insecure_port('[::]:{}'.format(config.port))
diff --git a/src/python/grpcio_tests/tests/tests.json b/src/python/grpcio_tests/tests/tests.json
index 45eb75b..dcaef0d 100644
--- a/src/python/grpcio_tests/tests/tests.json
+++ b/src/python/grpcio_tests/tests/tests.json
@@ -12,6 +12,7 @@
   "_channel_test.ChannelTest", 
   "_compression_test.CompressionTest",
   "_connectivity_channel_test.ConnectivityStatesTest",
+  "_credentials_test.CredentialsTest",
   "_empty_message_test.EmptyMessageTest",
   "_exit_test.ExitTest",
   "_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
diff --git a/src/python/grpcio_tests/tests/unit/_credentials_test.py b/src/python/grpcio_tests/tests/unit/_credentials_test.py
new file mode 100644
index 0000000..87af85a
--- /dev/null
+++ b/src/python/grpcio_tests/tests/unit/_credentials_test.py
@@ -0,0 +1,72 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests of credentials."""
+
+import unittest
+
+import grpc
+
+
+class CredentialsTest(unittest.TestCase):
+
+  def test_call_credentials_composition(self):
+    first = grpc.access_token_call_credentials('abc')
+    second = grpc.access_token_call_credentials('def')
+    third = grpc.access_token_call_credentials('ghi')
+
+    first_and_second = grpc.composite_call_credentials(first, second)
+    first_second_and_third = grpc.composite_call_credentials(
+        first, second, third)
+    
+    self.assertIsInstance(first_and_second, grpc.CallCredentials)
+    self.assertIsInstance(first_second_and_third, grpc.CallCredentials)
+
+  def test_channel_credentials_composition(self):
+    first_call_credentials = grpc.access_token_call_credentials('abc')
+    second_call_credentials = grpc.access_token_call_credentials('def')
+    third_call_credentials = grpc.access_token_call_credentials('ghi')
+    channel_credentials = grpc.ssl_channel_credentials()
+
+    channel_and_first = grpc.composite_channel_credentials(
+        channel_credentials, first_call_credentials)
+    channel_first_and_second = grpc.composite_channel_credentials(
+        channel_credentials, first_call_credentials, second_call_credentials)
+    channel_first_second_and_third = grpc.composite_channel_credentials(
+        channel_credentials, first_call_credentials, second_call_credentials,
+        third_call_credentials)
+
+    self.assertIsInstance(channel_and_first, grpc.ChannelCredentials)
+    self.assertIsInstance(channel_first_and_second, grpc.ChannelCredentials)
+    self.assertIsInstance(
+        channel_first_second_and_third, grpc.ChannelCredentials)
+
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
diff --git a/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index 7916203..d32208f 100644
--- a/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -41,6 +41,7 @@
 import six
 
 # test_interfaces is referenced from specification in this module.
+from grpc.framework.foundation import future
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.face import face
 from tests.unit.framework.common import test_constants
@@ -159,6 +160,8 @@
 
         test_messages.verify(request, response, self)
         self.assertIs(callback.future(), response_future)
+        self.assertIsNone(response_future.exception())
+        self.assertIsNone(response_future.traceback())
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -191,6 +194,8 @@
 
         test_messages.verify(requests, response, self)
         self.assertIs(future_passed_to_callback, response_future)
+        self.assertIsNone(response_future.exception())
+        self.assertIsNone(response_future.traceback())
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -301,6 +306,12 @@
         self.assertIs(callback.future(), response_future)
         self.assertFalse(cancel_method_return_value)
         self.assertTrue(response_future.cancelled())
+        with self.assertRaises(future.CancelledError):
+          response_future.result()
+        with self.assertRaises(future.CancelledError):
+          response_future.exception()
+        with self.assertRaises(future.CancelledError):
+          response_future.traceback()
 
   def testCancelledUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -332,6 +343,12 @@
         self.assertIs(callback.future(), response_future)
         self.assertFalse(cancel_method_return_value)
         self.assertTrue(response_future.cancelled())
+        with self.assertRaises(future.CancelledError):
+          response_future.result()
+        with self.assertRaises(future.CancelledError):
+          response_future.exception()
+        with self.assertRaises(future.CancelledError):
+          response_future.traceback()
 
   def testCancelledStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -363,6 +380,9 @@
               response_future.exception(), face.ExpirationError)
           with self.assertRaises(face.ExpirationError):
             response_future.result()
+          self.assertIsInstance(
+              response_future.exception(), face.AbortionError)
+          self.assertIsNotNone(response_future.traceback())
 
   def testExpiredUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -392,6 +412,9 @@
               response_future.exception(), face.ExpirationError)
           with self.assertRaises(face.ExpirationError):
             response_future.result()
+          self.assertIsInstance(
+              response_future.exception(), face.AbortionError)
+          self.assertIsNotNone(response_future.traceback())
 
   def testExpiredStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -426,6 +449,7 @@
               response_future.exception(), face.ExpirationError)
           with self.assertRaises(face.ExpirationError):
             response_future.result()
+          self.assertIsNotNone(response_future.traceback())
 
   def testFailedUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -463,6 +487,7 @@
               response_future.exception(), face.ExpirationError)
           with self.assertRaises(face.ExpirationError):
             response_future.result()
+          self.assertIsNotNone(response_future.traceback())
 
   def testFailedStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
diff --git a/src/python/grpcio_tests/tests/unit/test_common.py b/src/python/grpcio_tests/tests/unit/test_common.py
index c8886bf..cd71bd8 100644
--- a/src/python/grpcio_tests/tests/unit/test_common.py
+++ b/src/python/grpcio_tests/tests/unit/test_common.py
@@ -31,6 +31,7 @@
 
 import collections
 
+import grpc
 import six
 
 INVOCATION_INITIAL_METADATA = (('0', 'abc'), ('1', 'def'), ('2', 'ghi'),)
@@ -78,3 +79,24 @@
       return False
   else:
     return True
+
+
+def test_secure_channel(
+    target, channel_credentials, server_host_override):
+  """Creates an insecure Channel to a remote host.
+
+  Args:
+    host: The name of the remote host to which to connect.
+    port: The port of the remote host to which to connect.
+    channel_credentials: The implementations.ChannelCredentials with which to
+      connect.
+    server_host_override: The target name used for SSL host name checking.
+
+  Returns:
+    An implementations.Channel to the remote host through which RPCs may be
+      conducted.
+  """
+  channel = grpc.secure_channel(
+      target, channel_credentials,
+      (('grpc.ssl_target_name_override', server_host_override,),))
+  return channel
diff --git a/templates/package.json.template b/templates/package.json.template
index 9d19ca0..f68f64d 100644
--- a/templates/package.json.template
+++ b/templates/package.json.template
@@ -61,7 +61,6 @@
     "files": [
       "LICENSE",
       "src/node/README.md",
-      "src/node/health_check",
       "src/proto",
       "etc",
       "src/node/index.js",
diff --git a/templates/src/node/health_check/package.json.template b/templates/src/node/health_check/package.json.template
new file mode 100644
index 0000000..1248ced
--- /dev/null
+++ b/templates/src/node/health_check/package.json.template
@@ -0,0 +1,31 @@
+%YAML 1.2
+--- |
+  {
+    "name": "grpc-health-check",
+    "version": "${settings.node_version}",
+    "author": "Google Inc.",
+    "description": "Health check service for use with gRPC",
+    "repository": {
+      "type": "git",
+      "url": "https://github.com/grpc/grpc.git"
+    },
+    "bugs": "https://github.com/grpc/grpc/issues",
+    "contributors": [
+      {
+        "name": "Michael Lumish",
+        "email": "mlumish@google.com"
+      }
+    ],
+    "dependencies": {
+      "grpc": "^0.15.0",
+      "lodash": "^3.9.3",
+      "google-protobuf": "^3.0.0-alpha.5"
+    },
+    "files": {
+      "LICENSE",
+      "health.js",
+      "v1"
+    },
+    "main": "src/node/index.js",
+    "license": "BSD-3-Clause"
+  }
diff --git a/tools/run_tests/performance/run_worker_python.sh b/tools/run_tests/performance/run_worker_python.sh
index 3b8ba6f..06cf172 100755
--- a/tools/run_tests/performance/run_worker_python.sh
+++ b/tools/run_tests/performance/run_worker_python.sh
@@ -32,4 +32,4 @@
 
 cd $(dirname $0)/../../..
 
-PYTHONPATH=src/python/grpcio_tests:src/python/grpcio:src/python/gens py27/bin/python src/python/grpcio_tests/tests/qps/qps_worker.py $@
+PYTHONPATH=src/python/grpcio_tests:src/python/gens py27/bin/python src/python/grpcio_tests/tests/qps/qps_worker.py $@
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index 2d5130e..4dfd01f 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -387,45 +387,44 @@
     return 500
 
   def scenarios(self):
-    # TODO(issue #6522): Empty streaming requests does not work for python
-    #yield _ping_pong_scenario(
-    #    'python_generic_async_streaming_ping_pong', rpc_type='STREAMING',
-    #    client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
-    #    use_generic_payload=True,
-    #    categories=[SMOKETEST])
+    yield _ping_pong_scenario(
+        'python_generic_sync_streaming_ping_pong', rpc_type='STREAMING',
+        client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
+        use_generic_payload=True,
+        categories=[SMOKETEST])
 
     yield _ping_pong_scenario(
         'python_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER')
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER')
 
     yield _ping_pong_scenario(
         'python_protobuf_async_unary_ping_pong', rpc_type='UNARY',
-        client_type='ASYNC_CLIENT', server_type='SYNC_SERVER')
+        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')
 
     yield _ping_pong_scenario(
         'python_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
         categories=[SMOKETEST])
 
     yield _ping_pong_scenario(
         'python_protobuf_sync_unary_qps_unconstrained', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
         unconstrained_client='sync')
 
     yield _ping_pong_scenario(
         'python_protobuf_sync_streaming_qps_unconstrained', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
         unconstrained_client='sync')
 
     yield _ping_pong_scenario(
         'python_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
         server_language='c++', server_core_limit=1, async_server_threads=1,
         categories=[SMOKETEST])
 
     yield _ping_pong_scenario(
         'python_to_cpp_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
-        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
+        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
         server_language='c++', server_core_limit=1, async_server_threads=1)
 
   def __str__(self):