diff --git a/third_party/BUILD b/third_party/BUILD
index dea0fa904d6f9a..d45f5ecf97e5cb 100644
--- a/third_party/BUILD
+++ b/third_party/BUILD
@@ -16,6 +16,7 @@ filegroup(
         "//third_party/css/font_awesome:srcs",
         "//third_party/def_parser:srcs",
         "//third_party/grpc:srcs",
+        "//third_party/grpc-java:srcs",
         "//third_party/ijar:srcs",
         "//third_party/jarjar:srcs",
         "//third_party/java/android_databinding:srcs",
@@ -588,12 +589,12 @@ UNNECESSARY_DYNAMIC_LIBRARIES = select({
 genrule(
     name = "filter_netty_dynamic_libs",
     srcs = select({
-        "//src/conditions:darwin_arm64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final-osx-aarch_64.jar"],
-        "//src/conditions:darwin_x86_64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final-osx-x86_64.jar"],
-        "//src/conditions:linux_aarch64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final-linux-aarch_64.jar"],
-        "//src/conditions:linux_x86_64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final-linux-x86_64.jar"],
-        "//src/conditions:windows": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final-windows-x86_64.jar"],
-        "//conditions:default": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.44.Final.jar"],
+        "//src/conditions:darwin_arm64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.51.Final-osx-aarch_64.jar"],
+        "//src/conditions:darwin_x86_64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.51.Final-osx-x86_64.jar"],
+        "//src/conditions:linux_aarch64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.51.Final-linux-aarch_64.jar"],
+        "//src/conditions:linux_x86_64": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.51.Final-linux-x86_64.jar"],
+        "//src/conditions:windows": ["netty_tcnative/netty-tcnative-boringssl-static-2.0.51.Final-windows-x86_64.jar"],
+        "//conditions:default": [],
     }),
     outs = ["netty_tcnative/netty-tcnative-filtered.jar"],
     cmd = "cp $< $@ && " +
@@ -606,38 +607,43 @@ distrib_java_import(
     name = "netty",
     enable_distributions = ["debian"],
     jars = [
-        "netty/netty-buffer-4.1.69.Final.jar",
-        "netty/netty-codec-4.1.69.Final.jar",
-        "netty/netty-codec-http2-4.1.69.Final.jar",
-        "netty/netty-codec-http-4.1.69.Final.jar",
-        "netty/netty-common-4.1.69.Final.jar",
-        "netty/netty-handler-4.1.69.Final.jar",
-        "netty/netty-handler-proxy-4.1.69.Final.jar",
-        "netty/netty-resolver-4.1.69.Final.jar",
-        "netty/netty-resolver-dns-4.1.69.Final.jar",
-        "netty/netty-transport-4.1.69.Final.jar",
-        "netty/netty-transport-sctp-4.1.69.Final.jar",
+        "netty/netty-buffer-4.1.75.Final.jar",
+        "netty/netty-codec-4.1.75.Final.jar",
+        "netty/netty-codec-http2-4.1.75.Final.jar",
+        "netty/netty-codec-http-4.1.75.Final.jar",
+        "netty/netty-common-4.1.75.Final.jar",
+        "netty/netty-handler-4.1.75.Final.jar",
+        "netty/netty-handler-proxy-4.1.75.Final.jar",
+        "netty/netty-resolver-4.1.75.Final.jar",
+        "netty/netty-resolver-dns-4.1.75.Final.jar",
+        "netty/netty-transport-4.1.75.Final.jar",
+        "netty/netty-transport-classes-epoll-4.1.75.Final.jar",
+        "netty/netty-transport-classes-kqueue-4.1.75.Final.jar",
+        "netty/netty-transport-sctp-4.1.75.Final.jar",
     ] + select({
-        "//src/conditions:darwin_arm64": ["netty/netty-transport-native-unix-common-4.1.69.Final-osx-aarch_64.jar"],
-        "//src/conditions:darwin_x86_64": ["netty/netty-transport-native-unix-common-4.1.69.Final-osx-x86_64.jar"],
-        "//src/conditions:linux_aarch64": ["netty/netty-transport-native-unix-common-4.1.69.Final-linux-aarch_64.jar"],
-        "//src/conditions:linux_x86_64": ["netty/netty-transport-native-unix-common-4.1.69.Final-linux-x86_64.jar"],
-        "//conditions:default": ["netty/netty-transport-native-unix-common-4.1.69.Final.jar"],
+        "//src/conditions:darwin_arm64": ["netty/netty-transport-native-unix-common-4.1.75.Final-osx-aarch_64.jar"],
+        "//src/conditions:darwin_x86_64": ["netty/netty-transport-native-unix-common-4.1.75.Final-osx-x86_64.jar"],
+        "//src/conditions:linux_aarch64": ["netty/netty-transport-native-unix-common-4.1.75.Final-linux-aarch_64.jar"],
+        "//src/conditions:linux_x86_64": ["netty/netty-transport-native-unix-common-4.1.75.Final-linux-x86_64.jar"],
+        "//conditions:default": ["netty/netty-transport-native-unix-common-4.1.75.Final.jar"],
     }) + select({
-        "//src/conditions:darwin_arm64": ["netty/netty-transport-native-kqueue-4.1.69.Final-osx-aarch_64.jar"],
-        "//src/conditions:darwin_x86_64": ["netty/netty-transport-native-kqueue-4.1.69.Final-osx-x86_64.jar"],
-        "//conditions:default": ["netty/netty-transport-native-kqueue-4.1.69.Final.jar"],
+        "//src/conditions:darwin_arm64": ["netty/netty-transport-native-kqueue-4.1.75.Final-osx-aarch_64.jar"],
+        "//src/conditions:darwin_x86_64": ["netty/netty-transport-native-kqueue-4.1.75.Final-osx-x86_64.jar"],
+        "//conditions:default": [],
     }) + select({
-        "//src/conditions:linux_aarch64": ["netty/netty-transport-native-epoll-4.1.69.Final-linux-aarch_64.jar"],
-        "//src/conditions:linux_x86_64": ["netty/netty-transport-native-epoll-4.1.69.Final-linux-x86_64.jar"],
-        "//conditions:default": ["netty/netty-transport-native-epoll-4.1.69.Final.jar"],
+        "//src/conditions:linux_aarch64": ["netty/netty-transport-native-epoll-4.1.75.Final-linux-aarch_64.jar"],
+        "//src/conditions:linux_x86_64": ["netty/netty-transport-native-epoll-4.1.75.Final-linux-x86_64.jar"],
+        "//conditions:default": [],
     }),
 )
 
 distrib_java_import(
     name = "netty_tcnative",
     enable_distributions = ["debian"],
-    jars = [":netty_tcnative/netty-tcnative-filtered.jar"],
+    jars = [
+      "netty_tcnative/netty-tcnative-classes-2.0.51.Final.jar",
+      ":netty_tcnative/netty-tcnative-filtered.jar",
+    ],
 )
 
 distrib_java_import(
diff --git a/third_party/grpc-java/BUILD b/third_party/grpc-java/BUILD
new file mode 100644
index 00000000000000..dddcc18d519c22
--- /dev/null
+++ b/third_party/grpc-java/BUILD
@@ -0,0 +1,67 @@
+# gRPC Bazel BUILD file.
+#
+# Copyright 2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//tools/distributions:distribution_rules.bzl", "distrib_cc_binary", "distrib_jar_filegroup", "distrib_java_import")
+
+licenses(["notice"])  # Apache v2
+
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]),
+)
+
+distrib_jar_filegroup(
+    name = "bootstrap-grpc-jars",
+    srcs = [
+        "grpc-api-1.45.1.jar",
+        "grpc-auth-1.45.1.jar",
+        "grpc-context-1.45.1.jar",
+        "grpc-core-1.45.1.jar",
+        "grpc-netty-1.45.1.jar",
+        "grpc-protobuf-1.45.1.jar",
+        "grpc-protobuf-lite-1.45.1.jar",
+        "grpc-stub-1.45.1.jar",
+    ],
+    enable_distributions = ["debian"],
+)
+
+distrib_java_import(
+    name = "grpc-jar",
+    enable_distributions = ["debian"],
+    jars = [":bootstrap-grpc-jars"],
+    runtime_deps = [
+        "//third_party:netty",
+        "//third_party:opencensus-api",
+        "//third_party:perfmark-api",
+    ],
+    deps = [
+        "//third_party:guava",
+    ],
+)
+
+distrib_cc_binary(
+    name = "grpc-java-plugin",
+    srcs = [
+        "compiler/src/java_plugin/cpp/java_generator.cpp",
+        "compiler/src/java_plugin/cpp/java_generator.h",
+        "compiler/src/java_plugin/cpp/java_plugin.cpp",
+    ],
+    copts = ["-w"],
+    enable_distributions = ["debian"],
+    deps = ["//third_party/protobuf:protoc_lib"],
+)
diff --git a/third_party/grpc-java/LICENSE b/third_party/grpc-java/LICENSE
new file mode 100644
index 00000000000000..d645695673349e
--- /dev/null
+++ b/third_party/grpc-java/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      outstanding shares, or (iii) beneficial ownership of such entity.
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+      "Work" shall mean the work of authorship, whether in Source or
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+      (an example is provided in the Appendix below).
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+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
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+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/third_party/grpc-java/NOTICE.txt b/third_party/grpc-java/NOTICE.txt
new file mode 100644
index 00000000000000..f70c5620cf75a7
--- /dev/null
+++ b/third_party/grpc-java/NOTICE.txt
@@ -0,0 +1,62 @@
+Copyright 2014 The gRPC Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-----------------------------------------------------------------------
+
+This product contains a modified portion of 'OkHttp', an open source
+HTTP & SPDY client for Android and Java applications, which can be obtained
+at:
+
+  * LICENSE:
+    * okhttp/third_party/okhttp/LICENSE (Apache License 2.0)
+  * HOMEPAGE:
+    * https://github.com/square/okhttp
+  * LOCATION_IN_GRPC:
+    * okhttp/third_party/okhttp
+
+This product contains a modified portion of 'Envoy', an open source
+cloud-native high-performance edge/middle/service proxy, which can be
+obtained at:
+
+  * LICENSE:
+    * xds/third_party/envoy/LICENSE (Apache License 2.0)
+  * NOTICE:
+    * xds/third_party/envoy/NOTICE
+  * HOMEPAGE:
+    * https://www.envoyproxy.io
+  * LOCATION_IN_GRPC:
+    * xds/third_party/envoy
+
+This product contains a modified portion of 'protoc-gen-validate (PGV)',
+an open source protoc plugin to generate polyglot message validators,
+which can be obtained at:
+
+  * LICENSE:
+    * xds/third_party/protoc-gen-validate/LICENSE (Apache License 2.0)
+  * NOTICE:
+      * xds/third_party/protoc-gen-validate/NOTICE
+  * HOMEPAGE:
+    * https://github.com/envoyproxy/protoc-gen-validate
+  * LOCATION_IN_GRPC:
+    * xds/third_party/protoc-gen-validate
+
+This product contains a modified portion of 'udpa',
+an open source universal data plane API, which can be obtained at:
+
+  * LICENSE:
+    * xds/third_party/udpa/LICENSE (Apache License 2.0)
+  * HOMEPAGE:
+    * https://github.com/cncf/udpa
+  * LOCATION_IN_GRPC:
+    * xds/third_party/udpa
diff --git a/third_party/grpc-java/README.bazel.md b/third_party/grpc-java/README.bazel.md
new file mode 100644
index 00000000000000..cb5834d1ad2c68
--- /dev/null
+++ b/third_party/grpc-java/README.bazel.md
@@ -0,0 +1,17 @@
+# Bazel + Java gRPC
+
+This directory contains the Java gRPC libraries needed by Bazel, sourced from
+<https://github.com/grpc/grpc-java>.
+
+| Repo             | Current   |
+| ---------------- | --------- |
+| `grpc/grpc-java` | `v1.45.1` |
+
+## Updating `third_party/grpc/grpc-java`
+
+This requires 1 pull request which does:
+
+- Update the Java plugin:
+  1. Checkout tag `v${GRPC_VERSION_NUM}` from <https://github.com/grpc/grpc-java>
+  2. `cp -R <grpc-java git tree>/compiler/src/java_plugin third_party/grpc-java/compiler/src`
+- Update the required jars by [retrieving the version from Maven central](https://repo1.maven.org/maven2/io/grpc/)
diff --git a/third_party/grpc-java/README.md b/third_party/grpc-java/README.md
new file mode 100644
index 00000000000000..e6c06bde2366b7
--- /dev/null
+++ b/third_party/grpc-java/README.md
@@ -0,0 +1,253 @@
+gRPC-Java - An RPC library and framework
+========================================
+
+gRPC-Java works with JDK 7. gRPC-Java clients are supported on Android API
+levels 16 and up (Jelly Bean and later). Deploying gRPC servers on an Android
+device is not supported.
+
+TLS usage typically requires using Java 8, or Play Services Dynamic Security
+Provider on Android. Please see the [Security Readme](SECURITY.md).
+
+<table>
+  <tr>
+    <td><b>Homepage:</b></td>
+    <td><a href="https://grpc.io/">grpc.io</a></td>
+  </tr>
+  <tr>
+    <td><b>Mailing List:</b></td>
+    <td><a href="https://groups.google.com/forum/#!forum/grpc-io">grpc-io@googlegroups.com</a></td>
+  </tr>
+</table>
+
+[![Join the chat at https://gitter.im/grpc/grpc](https://badges.gitter.im/grpc/grpc.svg)](https://gitter.im/grpc/grpc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Build Status](https://travis-ci.org/grpc/grpc-java.svg?branch=master)](https://travis-ci.org/grpc/grpc-java)
+[![Line Coverage Status](https://coveralls.io/repos/grpc/grpc-java/badge.svg?branch=master&service=github)](https://coveralls.io/github/grpc/grpc-java?branch=master)
+[![Branch-adjusted Line Coverage Status](https://codecov.io/gh/grpc/grpc-java/branch/master/graph/badge.svg)](https://codecov.io/gh/grpc/grpc-java)
+
+Getting Started
+---------------
+
+For a guided tour, take a look at the [quick start
+guide](https://grpc.io/docs/languages/java/quickstart) or the more explanatory [gRPC
+basics](https://grpc.io/docs/languages/java/basics).
+
+The [examples](https://github.com/grpc/grpc-java/tree/v1.41.0/examples) and the
+[Android example](https://github.com/grpc/grpc-java/tree/v1.41.0/examples/android)
+are standalone projects that showcase the usage of gRPC.
+
+Download
+--------
+
+Download [the JARs][]. Or for Maven with non-Android, add to your `pom.xml`:
+```xml
+<dependency>
+  <groupId>io.grpc</groupId>
+  <artifactId>grpc-netty-shaded</artifactId>
+  <version>1.41.0</version>
+</dependency>
+<dependency>
+  <groupId>io.grpc</groupId>
+  <artifactId>grpc-protobuf</artifactId>
+  <version>1.41.0</version>
+</dependency>
+<dependency>
+  <groupId>io.grpc</groupId>
+  <artifactId>grpc-stub</artifactId>
+  <version>1.41.0</version>
+</dependency>
+<dependency> <!-- necessary for Java 9+ -->
+  <groupId>org.apache.tomcat</groupId>
+  <artifactId>annotations-api</artifactId>
+  <version>6.0.53</version>
+  <scope>provided</scope>
+</dependency>
+```
+
+Or for Gradle with non-Android, add to your dependencies:
+```gradle
+implementation 'io.grpc:grpc-netty-shaded:1.41.0'
+implementation 'io.grpc:grpc-protobuf:1.41.0'
+implementation 'io.grpc:grpc-stub:1.41.0'
+compileOnly 'org.apache.tomcat:annotations-api:6.0.53' // necessary for Java 9+
+```
+
+For Android client, use `grpc-okhttp` instead of `grpc-netty-shaded` and
+`grpc-protobuf-lite` instead of `grpc-protobuf`:
+```gradle
+implementation 'io.grpc:grpc-okhttp:1.41.0'
+implementation 'io.grpc:grpc-protobuf-lite:1.41.0'
+implementation 'io.grpc:grpc-stub:1.41.0'
+compileOnly 'org.apache.tomcat:annotations-api:6.0.53' // necessary for Java 9+
+```
+
+[the JARs]:
+https://search.maven.org/search?q=g:io.grpc%20AND%20v:1.41.0
+
+Development snapshots are available in [Sonatypes's snapshot
+repository](https://oss.sonatype.org/content/repositories/snapshots/).
+
+Generated Code
+--------------
+
+For protobuf-based codegen, you can put your proto files in the `src/main/proto`
+and `src/test/proto` directories along with an appropriate plugin.
+
+For protobuf-based codegen integrated with the Maven build system, you can use
+[protobuf-maven-plugin][] (Eclipse and NetBeans users should also look at
+`os-maven-plugin`'s
+[IDE documentation](https://github.com/trustin/os-maven-plugin#issues-with-eclipse-m2e-or-other-ides)):
+```xml
+<build>
+  <extensions>
+    <extension>
+      <groupId>kr.motd.maven</groupId>
+      <artifactId>os-maven-plugin</artifactId>
+      <version>1.6.2</version>
+    </extension>
+  </extensions>
+  <plugins>
+    <plugin>
+      <groupId>org.xolstice.maven.plugins</groupId>
+      <artifactId>protobuf-maven-plugin</artifactId>
+      <version>0.6.1</version>
+      <configuration>
+        <protocArtifact>com.google.protobuf:protoc:3.17.3:exe:${os.detected.classifier}</protocArtifact>
+        <pluginId>grpc-java</pluginId>
+        <pluginArtifact>io.grpc:protoc-gen-grpc-java:1.41.0:exe:${os.detected.classifier}</pluginArtifact>
+      </configuration>
+      <executions>
+        <execution>
+          <goals>
+            <goal>compile</goal>
+            <goal>compile-custom</goal>
+          </goals>
+        </execution>
+      </executions>
+    </plugin>
+  </plugins>
+</build>
+```
+
+[protobuf-maven-plugin]: https://www.xolstice.org/protobuf-maven-plugin/
+
+For non-Android protobuf-based codegen integrated with the Gradle build system,
+you can use [protobuf-gradle-plugin][]:
+```gradle
+plugins {
+    id 'com.google.protobuf' version '0.8.17'
+}
+
+protobuf {
+  protoc {
+    artifact = "com.google.protobuf:protoc:3.17.3"
+  }
+  plugins {
+    grpc {
+      artifact = 'io.grpc:protoc-gen-grpc-java:1.41.0'
+    }
+  }
+  generateProtoTasks {
+    all()*.plugins {
+      grpc {}
+    }
+  }
+}
+```
+
+[protobuf-gradle-plugin]: https://github.com/google/protobuf-gradle-plugin
+
+The prebuilt protoc-gen-grpc-java binary uses glibc on Linux. If you are
+compiling on Alpine Linux, you may want to use the [Alpine grpc-java package][]
+which uses musl instead.
+
+[Alpine grpc-java package]: https://pkgs.alpinelinux.org/package/edge/testing/x86_64/grpc-java
+
+For Android protobuf-based codegen integrated with the Gradle build system, also
+use protobuf-gradle-plugin but specify the 'lite' options:
+
+```gradle
+plugins {
+    id 'com.google.protobuf' version '0.8.17'
+}
+
+protobuf {
+  protoc {
+    artifact = "com.google.protobuf:protoc:3.17.3"
+  }
+  plugins {
+    grpc {
+      artifact = 'io.grpc:protoc-gen-grpc-java:1.41.0'
+    }
+  }
+  generateProtoTasks {
+    all().each { task ->
+      task.builtins {
+        java { option 'lite' }
+      }
+      task.plugins {
+        grpc { option 'lite' }
+      }
+    }
+  }
+}
+
+```
+
+API Stability
+-------------
+
+APIs annotated with `@Internal` are for internal use by the gRPC library and
+should not be used by gRPC users. APIs annotated with `@ExperimentalApi` are
+subject to change in future releases, and library code that other projects
+may depend on should not use these APIs.
+
+We recommend using the
+[grpc-java-api-checker](https://github.com/grpc/grpc-java-api-checker)
+(an [Error Prone](https://github.com/google/error-prone) plugin)
+to check for usages of `@ExperimentalApi` and `@Internal` in any library code
+that depends on gRPC. It may also be used to check for `@Internal` usage or
+unintended `@ExperimentalApi` consumption in non-library code.
+
+How to Build
+------------
+
+If you are making changes to gRPC-Java, see the [compiling
+instructions](COMPILING.md).
+
+High-level Components
+---------------------
+
+At a high level there are three distinct layers to the library: *Stub*,
+*Channel*, and *Transport*.
+
+### Stub
+
+The Stub layer is what is exposed to most developers and provides type-safe
+bindings to whatever datamodel/IDL/interface you are adapting. gRPC comes with
+a [plugin](https://github.com/google/grpc-java/blob/master/compiler) to the
+protocol-buffers compiler that generates Stub interfaces out of `.proto` files,
+but bindings to other datamodel/IDL are easy and encouraged.
+
+### Channel
+
+The Channel layer is an abstraction over Transport handling that is suitable for
+interception/decoration and exposes more behavior to the application than the
+Stub layer. It is intended to be easy for application frameworks to use this
+layer to address cross-cutting concerns such as logging, monitoring, auth, etc.
+
+### Transport
+
+The Transport layer does the heavy lifting of putting and taking bytes off the
+wire. The interfaces to it are abstract just enough to allow plugging in of
+different implementations. Note the transport layer API is considered internal
+to gRPC and has weaker API guarantees than the core API under package `io.grpc`.
+
+gRPC comes with three Transport implementations:
+
+1. The Netty-based transport is the main transport implementation based on
+   [Netty](https://netty.io). It is for both the client and the server.
+2. The OkHttp-based transport is a lightweight transport based on
+   [OkHttp](https://square.github.io/okhttp/). It is mainly for use on Android
+   and is for client only.
+3. The in-process transport is for when a server is in the same process as the
+   client. It is useful for testing, while also being safe for production use.
diff --git a/third_party/grpc/compiler/src/java_plugin/cpp/java_generator.cpp b/third_party/grpc-java/compiler/src/java_plugin/cpp/java_generator.cpp
similarity index 95%
rename from third_party/grpc/compiler/src/java_plugin/cpp/java_generator.cpp
rename to third_party/grpc-java/compiler/src/java_plugin/cpp/java_generator.cpp
index facb95de145cef..6882940378f0fc 100644
--- a/third_party/grpc/compiler/src/java_plugin/cpp/java_generator.cpp
+++ b/third_party/grpc-java/compiler/src/java_plugin/cpp/java_generator.cpp
@@ -713,11 +713,13 @@ static void PrintStub(
           if (client_streaming) {
             p->Print(
                 *vars,
-                "return asyncUnimplementedStreamingCall($method_method_name$(), responseObserver);\n");
+                "return io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall("
+                "$method_method_name$(), responseObserver);\n");
           } else {
             p->Print(
                 *vars,
-                "asyncUnimplementedUnaryCall($method_method_name$(), responseObserver);\n");
+                "io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall("
+                "$method_method_name$(), responseObserver);\n");
           }
           break;
         default:
@@ -729,10 +731,10 @@ static void PrintStub(
           GRPC_CODEGEN_CHECK(!client_streaming)
               << "Blocking client streaming interface is not available";
           if (server_streaming) {
-            (*vars)["calls_method"] = "blockingServerStreamingCall";
+            (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingServerStreamingCall";
             (*vars)["params"] = "request";
           } else {
-            (*vars)["calls_method"] = "blockingUnaryCall";
+            (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.blockingUnaryCall";
             (*vars)["params"] = "request";
           }
           p->Print(
@@ -743,18 +745,18 @@ static void PrintStub(
         case ASYNC_CALL:
           if (server_streaming) {
             if (client_streaming) {
-              (*vars)["calls_method"] = "asyncBidiStreamingCall";
+              (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.asyncBidiStreamingCall";
               (*vars)["params"] = "responseObserver";
             } else {
-              (*vars)["calls_method"] = "asyncServerStreamingCall";
+              (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.asyncServerStreamingCall";
               (*vars)["params"] = "request, responseObserver";
             }
           } else {
             if (client_streaming) {
-              (*vars)["calls_method"] = "asyncClientStreamingCall";
+              (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.asyncClientStreamingCall";
               (*vars)["params"] = "responseObserver";
             } else {
-              (*vars)["calls_method"] = "asyncUnaryCall";
+              (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.asyncUnaryCall";
               (*vars)["params"] = "request, responseObserver";
             }
           }
@@ -769,7 +771,7 @@ static void PrintStub(
               << "Future interface doesn't support streaming. "
               << "client_streaming=" << client_streaming << ", "
               << "server_streaming=" << server_streaming;
-          (*vars)["calls_method"] = "futureUnaryCall";
+          (*vars)["calls_method"] = "io.grpc.stub.ClientCalls.futureUnaryCall";
           p->Print(
               *vars,
               "return $calls_method$(\n"
@@ -1031,15 +1033,15 @@ static void PrintBindServiceMethodBody(const ServiceDescriptor* service,
     bool server_streaming = method->server_streaming();
     if (client_streaming) {
       if (server_streaming) {
-        (*vars)["calls_method"] = "asyncBidiStreamingCall";
+        (*vars)["calls_method"] = "io.grpc.stub.ServerCalls.asyncBidiStreamingCall";
       } else {
-        (*vars)["calls_method"] = "asyncClientStreamingCall";
+        (*vars)["calls_method"] = "io.grpc.stub.ServerCalls.asyncClientStreamingCall";
       }
     } else {
       if (server_streaming) {
-        (*vars)["calls_method"] = "asyncServerStreamingCall";
+        (*vars)["calls_method"] = "io.grpc.stub.ServerCalls.asyncServerStreamingCall";
       } else {
-        (*vars)["calls_method"] = "asyncUnaryCall";
+        (*vars)["calls_method"] = "io.grpc.stub.ServerCalls.asyncUnaryCall";
       }
     }
     p->Print(*vars, ".addMethod(\n");
@@ -1084,7 +1086,8 @@ static void PrintService(const ServiceDescriptor* service,
       *vars,
       "@$Generated$(\n"
       "    value = \"by gRPC proto compiler$grpc_version$\",\n"
-      "    comments = \"Source: $file_name$\")\n");
+      "    comments = \"Source: $file_name$\")\n"
+      "@$GrpcGenerated$\n");
 
   if (service->options().deprecated()) {
     p->Print(*vars, "@$Deprecated$\n");
@@ -1160,33 +1163,7 @@ static void PrintService(const ServiceDescriptor* service,
 void PrintImports(Printer* p) {
   p->Print(
       "import static "
-      "io.grpc.MethodDescriptor.generateFullMethodName;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.asyncBidiStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.asyncClientStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.asyncServerStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.asyncUnaryCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.blockingServerStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.blockingUnaryCall;\n"
-      "import static "
-      "io.grpc.stub.ClientCalls.futureUnaryCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncBidiStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncClientStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncServerStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncUnaryCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncUnimplementedStreamingCall;\n"
-      "import static "
-      "io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;\n\n");
+      "io.grpc.MethodDescriptor.generateFullMethodName;\n\n");
 }
 
 void GenerateService(const ServiceDescriptor* service,
@@ -1225,6 +1202,7 @@ void GenerateService(const ServiceDescriptor* service,
   vars["StreamObserver"] = "io.grpc.stub.StreamObserver";
   vars["Iterator"] = "java.util.Iterator";
   vars["Generated"] = "javax.annotation.Generated";
+  vars["GrpcGenerated"] = "io.grpc.stub.annotations.GrpcGenerated";
   vars["ListenableFuture"] =
       "com.google.common.util.concurrent.ListenableFuture";
 
diff --git a/third_party/grpc/compiler/src/java_plugin/cpp/java_generator.h b/third_party/grpc-java/compiler/src/java_plugin/cpp/java_generator.h
similarity index 100%
rename from third_party/grpc/compiler/src/java_plugin/cpp/java_generator.h
rename to third_party/grpc-java/compiler/src/java_plugin/cpp/java_generator.h
diff --git a/third_party/grpc/compiler/src/java_plugin/cpp/java_plugin.cpp b/third_party/grpc-java/compiler/src/java_plugin/cpp/java_plugin.cpp
similarity index 100%
rename from third_party/grpc/compiler/src/java_plugin/cpp/java_plugin.cpp
rename to third_party/grpc-java/compiler/src/java_plugin/cpp/java_plugin.cpp
diff --git a/third_party/grpc-java/grpc-api-1.45.1.jar b/third_party/grpc-java/grpc-api-1.45.1.jar
new file mode 100644
index 00000000000000..1aadcf989e2c1e
Binary files /dev/null and b/third_party/grpc-java/grpc-api-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-auth-1.45.1.jar b/third_party/grpc-java/grpc-auth-1.45.1.jar
new file mode 100644
index 00000000000000..800f4d2dbaba01
Binary files /dev/null and b/third_party/grpc-java/grpc-auth-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-context-1.45.1.jar b/third_party/grpc-java/grpc-context-1.45.1.jar
new file mode 100644
index 00000000000000..091429b8a03f07
Binary files /dev/null and b/third_party/grpc-java/grpc-context-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-core-1.45.1.jar b/third_party/grpc-java/grpc-core-1.45.1.jar
new file mode 100644
index 00000000000000..8573983e95f22b
Binary files /dev/null and b/third_party/grpc-java/grpc-core-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-netty-1.45.1.jar b/third_party/grpc-java/grpc-netty-1.45.1.jar
new file mode 100644
index 00000000000000..5be81e040f5750
Binary files /dev/null and b/third_party/grpc-java/grpc-netty-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-protobuf-1.45.1.jar b/third_party/grpc-java/grpc-protobuf-1.45.1.jar
new file mode 100644
index 00000000000000..21ff986051d04a
Binary files /dev/null and b/third_party/grpc-java/grpc-protobuf-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-protobuf-lite-1.45.1.jar b/third_party/grpc-java/grpc-protobuf-lite-1.45.1.jar
new file mode 100644
index 00000000000000..99c15a786bc423
Binary files /dev/null and b/third_party/grpc-java/grpc-protobuf-lite-1.45.1.jar differ
diff --git a/third_party/grpc-java/grpc-stub-1.45.1.jar b/third_party/grpc-java/grpc-stub-1.45.1.jar
new file mode 100644
index 00000000000000..e147c697086144
Binary files /dev/null and b/third_party/grpc-java/grpc-stub-1.45.1.jar differ
diff --git a/third_party/grpc/BUILD b/third_party/grpc/BUILD
index 09d036555fcc64..d52ecc6da5f93d 100644
--- a/third_party/grpc/BUILD
+++ b/third_party/grpc/BUILD
@@ -14,12 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-load("//tools/distributions:distribution_rules.bzl", "distrib_cc_binary", "distrib_jar_filegroup", "distrib_java_import")
-
 licenses(["notice"])  # Apache v2
 
 exports_files([
-    "grpc_1.31.1.patch",
     "grpc_1.41.0.patch",
     "grpc_1.41.0.win_arm64.patch"
 ])
@@ -33,45 +30,22 @@ filegroup(
     ],
 )
 
-distrib_jar_filegroup(
-    name = "bootstrap-grpc-jars",
-    srcs = [
-        "grpc-api-1.41.0.jar",
-        "grpc-auth-1.41.0.jar",
-        "grpc-context-1.41.0.jar",
-        "grpc-core-1.41.0.jar",
-        "grpc-netty-1.41.0.jar",
-        "grpc-protobuf-1.41.0.jar",
-        "grpc-protobuf-lite-1.41.0.jar",
-        "grpc-stub-1.41.0.jar",
-    ],
-    enable_distributions = ["debian"],
+# TODO: Remove after migrating non-third-party imports to use `third_party/grpc-java` directly.
+alias(
+   name = "bootstrap-grpc-jars",
+   actual = "//third_party/grpc-java:bootstrap-grpc-jars",
 )
 
-distrib_java_import(
-    name = "grpc-jar",
-    enable_distributions = ["debian"],
-    jars = [":bootstrap-grpc-jars"],
-    runtime_deps = [
-        "//third_party:netty",
-        "//third_party:opencensus-api",
-        "//third_party:perfmark-api",
-    ],
-    deps = [
-        "//third_party:guava",
-    ],
+# TODO: Remove after migrating non-third-party imports to use `third_party/grpc-java` directly.
+alias(
+   name = "grpc-jar",
+   actual = "//third_party/grpc-java:grpc-jar",
 )
 
-distrib_cc_binary(
-    name = "grpc-java-plugin",
-    srcs = [
-        "compiler/src/java_plugin/cpp/java_generator.cpp",
-        "compiler/src/java_plugin/cpp/java_generator.h",
-        "compiler/src/java_plugin/cpp/java_plugin.cpp",
-    ],
-    copts = ["-w"],
-    enable_distributions = ["debian"],
-    deps = ["//third_party/protobuf:protoc_lib"],
+# TODO: Remove after migrating non-third-party imports to use `third_party/grpc-java` directly.
+alias(
+   name = "grpc-java-plugin",
+   actual = "//third_party/grpc-java:grpc-java-plugin",
 )
 
 alias(
diff --git a/third_party/grpc/NOTICE.txt b/third_party/grpc/NOTICE.txt
index ee67bad4ba4c68..530197749e9d38 100644
--- a/third_party/grpc/NOTICE.txt
+++ b/third_party/grpc/NOTICE.txt
@@ -1,41 +1,13 @@
-Copyright 2014, Google Inc. All rights reserved.
+Copyright 2014 gRPC authors.
 
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
 
-   * 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.
+    http://www.apache.org/licenses/LICENSE-2.0
 
-   * 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 product contains a modified portion of 'OkHttp', an open source
-HTTP & SPDY client for Android and Java applications, which can be obtained
-at:
-
-  * LICENSE:
-    * okhttp/third_party/okhttp/LICENSE (Apache License 2.0)
-  * HOMEPAGE:
-    * https://github.com/square/okhttp
-  * LOCATION_IN_GRPC:
-    * okhttp/third_party/okhttp
\ No newline at end of file
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/third_party/grpc/PATENTS b/third_party/grpc/PATENTS
deleted file mode 100644
index 619f9dbfe637f6..00000000000000
--- a/third_party/grpc/PATENTS
+++ /dev/null
@@ -1,22 +0,0 @@
-Additional IP Rights Grant (Patents)
-
-"This implementation" means the copyrightable works distributed by
-Google as part of the GRPC project.
-
-Google hereby grants to You a perpetual, worldwide, non-exclusive,
-no-charge, royalty-free, irrevocable (except as stated in this section)
-patent license to make, have made, use, offer to sell, sell, import,
-transfer and otherwise run, modify and propagate the contents of this
-implementation of GRPC, where such license applies only to those patent
-claims, both currently owned or controlled by Google and acquired in
-the future, licensable by Google that are necessarily infringed by this
-implementation of GRPC.  This grant does not include claims that would be
-infringed only as a consequence of further modification of this
-implementation.  If you or your agent or exclusive licensee institute or
-order or agree to the institution of patent litigation against any
-entity (including a cross-claim or counterclaim in a lawsuit) alleging
-that this implementation of GRPC or any code incorporated within this
-implementation of GRPC constitutes direct or contributory patent
-infringement, or inducement of patent infringement, then any patent
-rights granted to you under this License for this implementation of GRPC
-shall terminate as of the date such litigation is filed.
diff --git a/third_party/grpc/README.bazel.md b/third_party/grpc/README.bazel.md
index 4798ec2e290b3f..9d94d14230f32c 100644
--- a/third_party/grpc/README.bazel.md
+++ b/third_party/grpc/README.bazel.md
@@ -1,30 +1,33 @@
-# How to update the C++ sources of gRPC:
+# Bazel + gRPC
 
-1. Update the gRPC definitions in WORKSPACE file, currently we use 
-   https://github.com/grpc/grpc/archive/v1.41.0.tar.gz
-2. Update the gRPC patch file if necessary, it mostly helps avoid unnecessary dependencies.
-3. Update third_party/grpc/BUILD to redirect targets to @com_github_grpc_grpc if necessary.
+This directory contains the gRPC libraries needed by Bazel, sourced from
+<https://github.com/grpc/grpc>.
 
-# How to update the BUILD/bzl sources of gRPC:
+| Repo             | Current   |
+| ---------------- | --------- |
+| `grpc/grpc`      | `v1.41.0` |
 
-1. `git clone http://github.com/grpc/grpc.git` in a convenient directory
-2. `git checkout <tag>` (current is `v1.41.0`, commithash `fc662b7964384b701af5bd3ce6994d2180080eb4`)
-3. `mkdir -p third_party/grpc/bazel`
-4. `cp <gRPC git tree>/bazel/{BUILD,cc_grpc_library.bzl,generate_cc.bzl,protobuf.bzl} third_party/grpc/bazel`
-5. In the `third_party/grpc` directory, apply local patches:
-   `patch -p3 < bazel_1.41.0.patch`
+## Updating `third_party/grpc`
+
+This requires 3 pull requests:
 
-# How to update the Java plugin:
+1. Update `third_party/grpc` to include files from new version
 
-1. Checkout tag `v1.41.0` from https://github.com/grpc/grpc-java
-2. `cp -R <grpc-java git tree>/compiler/src/java_plugin third_party/grpc/compiler/src`
+2. Switch `distdir_deps.bzl`, `scripts/bootstrap/compile.sh`, and any other references to new version
 
-# How to update the Java code:
+3. Remove older version from `third_party/grpc`
 
-Download the necessary jars at version `1.41.0` from maven central.
+### How to update the C++ sources of gRPC
 
-# Submitting the change needs 3 pull requests
+1. Update the gRPC patch file if necessary, it mostly helps avoid unnecessary dependencies.
+2. Update `third_party/grpc/BUILD` to redirect targets to `@com_github_grpc_grpc` if necessary.
+3. In a separate PR, update the gRPC definitions in the `distdir_deps.bzl` file.
 
-1. Update third_party/grpc to include files from new version
-2. Switch distdir_deps.bzl, scripts/bootstrap/compile.sh and any other references to new version
-3. Remove older version from third_party/grpc
+### How to update the BUILD/bzl sources of gRPC
+
+1. `git clone http://github.com/grpc/grpc.git` in a convenient directory
+2. `git checkout v${GRPC_VERSION_NUM}`
+3. `mkdir -p third_party/grpc/bazel`
+4. `cp <gRPC git tree>/bazel/{BUILD,cc_grpc_library.bzl,generate_cc.bzl,protobuf.bzl} third_party/grpc/bazel`
+5. In the `third_party/grpc/grpc` directory, apply local patches:
+   `patch -p4 < bazel_${GRPC_VERSION_NUM}.patch`
\ No newline at end of file
diff --git a/third_party/grpc/README.md b/third_party/grpc/README.md
index 186678b5443127..85a9d7b5783e2d 100644
--- a/third_party/grpc/README.md
+++ b/third_party/grpc/README.md
@@ -1,14 +1,12 @@
-gRPC-Java - An RPC library and framework
-========================================
+gRPC - An RPC library and framework
+===================================
 
-gRPC-Java works with JDK 6. TLS usage typically requires using Java 8, or Play
-Services Dynamic Security Provider on Android. Please see the [Security
-Readme](SECURITY.md).
+gRPC is a modern, open source, high-performance remote procedure call (RPC) framework that can run anywhere. gRPC enables client and server applications to communicate transparently, and simplifies the building of connected systems.
 
 <table>
   <tr>
     <td><b>Homepage:</b></td>
-    <td><a href="http://www.grpc.io/">www.grpc.io</a></td>
+    <td><a href="https://grpc.io/">grpc.io</a></td>
   </tr>
   <tr>
     <td><b>Mailing List:</b></td>
@@ -16,211 +14,74 @@ Readme](SECURITY.md).
   </tr>
 </table>
 
-[![Build Status](https://travis-ci.org/grpc/grpc-java.svg?branch=master)](https://travis-ci.org/grpc/grpc-java)
-[![Coverage Status](https://coveralls.io/repos/grpc/grpc-java/badge.svg?branch=master&service=github)](https://coveralls.io/github/grpc/grpc-java?branch=master)
-
-Download
---------
-
-Download [the JAR][]. Or for Maven, add to your `pom.xml`:
-```xml
-<dependency>
-  <groupId>io.grpc</groupId>
-  <artifactId>grpc-all</artifactId>
-  <version>0.13.2</version>
-</dependency>
-```
-
-Or for Gradle, add to your dependencies:
-```gradle
-compile 'io.grpc:grpc-all:0.13.2'
-```
-
-For Android client, you only need to depend on the needed sub-projects, such as:
-```gradle
-compile 'io.grpc:grpc-okhttp:0.13.2'
-compile 'io.grpc:grpc-protobuf-nano:0.13.2'
-compile 'io.grpc:grpc-stub:0.13.2'
-```
-
-[the JAR]: https://search.maven.org/remote_content?g=io.grpc&a=grpc-all&v=0.13.2
-
-Development snapshots are available in [Sonatypes's snapshot
-repository](https://oss.sonatype.org/content/repositories/snapshots/).
-
-For protobuf-based codegen, you can put your proto files in the `src/main/proto`
-and `src/test/proto` directories along with an appropriate plugin.
-
-For protobuf-based codegen integrated with the Maven build system, you can use
-[protobuf-maven-plugin][]:
-```xml
-<build>
-  <extensions>
-    <extension>
-      <groupId>kr.motd.maven</groupId>
-      <artifactId>os-maven-plugin</artifactId>
-      <version>1.4.1.Final</version>
-    </extension>
-  </extensions>
-  <plugins>
-    <plugin>
-      <groupId>org.xolstice.maven.plugins</groupId>
-      <artifactId>protobuf-maven-plugin</artifactId>
-      <version>0.5.0</version>
-      <configuration>
-        <!--
-          The version of protoc must match protobuf-java. If you don't depend on
-          protobuf-java directly, you will be transitively depending on the
-          protobuf-java version that grpc depends on.
-        -->
-        <protocArtifact>com.google.protobuf:protoc:3.0.0-beta-2:exe:${os.detected.classifier}</protocArtifact>
-        <pluginId>grpc-java</pluginId>
-        <pluginArtifact>io.grpc:protoc-gen-grpc-java:0.13.2:exe:${os.detected.classifier}</pluginArtifact>
-      </configuration>
-      <executions>
-        <execution>
-          <goals>
-            <goal>compile</goal>
-            <goal>compile-custom</goal>
-          </goals>
-        </execution>
-      </executions>
-    </plugin>
-  </plugins>
-</build>
-```
-
-[protobuf-maven-plugin]: https://www.xolstice.org/protobuf-maven-plugin/
-
-For protobuf-based codegen integrated with the Gradle build system, you can use
-[protobuf-gradle-plugin][]:
-```gradle
-apply plugin: 'java'
-apply plugin: 'com.google.protobuf'
-
-buildscript {
-  repositories {
-    mavenCentral()
-  }
-  dependencies {
-    classpath 'com.google.protobuf:protobuf-gradle-plugin:0.7.4'
-  }
-}
-
-protobuf {
-  protoc {
-    // The version of protoc must match protobuf-java. If you don't depend on
-    // protobuf-java directly, you will be transitively depending on the
-    // protobuf-java version that grpc depends on.
-    artifact = "com.google.protobuf:protoc:3.0.0-beta-2"
-  }
-  plugins {
-    grpc {
-      artifact = 'io.grpc:protoc-gen-grpc-java:0.13.2'
-    }
-  }
-  generateProtoTasks {
-    all()*.plugins {
-      grpc {}
-    }
-  }
-}
-```
-
-[protobuf-gradle-plugin]: https://github.com/google/protobuf-gradle-plugin
-
-How to Build
-------------
-
-If you are making changes to gRPC-Java, see the [compiling
-instructions](COMPILING.md).
-
-Navigating Around the Source
-----------------------------
-
-Here's a quick readers' guide to the code to help folks get started. At a high
-level there are three distinct layers to the library: __Stub__, __Channel__ &
-__Transport__.
-
-### Stub
-
-The Stub layer is what is exposed to most developers and provides type-safe
-bindings to whatever datamodel/IDL/interface you are adapting. gRPC comes with
-a [plugin](https://github.com/google/grpc-java/blob/master/compiler) to the
-protocol-buffers compiler that generates Stub interfaces out of `.proto` files,
-but bindings to other datamodel/IDL should be trivial to add and are welcome.
-
-#### Key Interfaces
-
-[Stream Observer](https://github.com/google/grpc-java/blob/master/stub/src/main/java/io/grpc/stub/StreamObserver.java)
-
-### Channel
-
-The Channel layer is an abstraction over Transport handling that is suitable for
-interception/decoration and exposes more behavior to the application than the
-Stub layer. It is intended to be easy for application frameworks to use this
-layer to address cross-cutting concerns such as logging, monitoring, auth etc.
-Flow-control is also exposed at this layer to allow more sophisticated
-applications to interact with it directly.
-
-#### Common
-
-* [Metadata - headers & trailers](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/Metadata.java)
-* [Status - error code namespace & handling](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/Status.java)
-
-#### Client
-* [Channel - client side binding](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/Channel.java)
-* [Client Call](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/ClientCall.java)
-* [Client Interceptor](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/ClientInterceptor.java)
-
-#### Server
-* [Server call handler - analog to Channel on server](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/ServerCallHandler.java)
-* [Server Call](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/ServerCall.java)
-
-
-### Transport
-
-The Transport layer does the heavy lifting of putting and taking bytes off the
-wire. The interfaces to it are abstract just enough to allow plugging in of
-different implementations. Transports are modeled as `Stream` factories. The
-variation in interface between a server Stream and a client Stream exists to
-codify their differing semantics for cancellation and error reporting.
+[![Join the chat at https://gitter.im/grpc/grpc](https://badges.gitter.im/grpc/grpc.svg)](https://gitter.im/grpc/grpc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-Note the transport layer API is considered internal to gRPC and has weaker API
-guarantees than the core API under package `io.grpc`.
+# To start using gRPC
 
-gRPC comes with three Transport implementations:
+To maximize usability, gRPC supports the standard method for adding dependencies to a user's chosen language (if there is one).
+In most languages, the gRPC runtime comes as a package available in a user's language package manager.
 
-1. The [Netty-based](https://github.com/google/grpc-java/blob/master/netty)
-   transport is the main transport implementation based on
-   [Netty](http://netty.io). It is for both the client and the server.
-2. The [OkHttp-based](https://github.com/google/grpc-java/blob/master/okhttp)
-   transport is a lightweight transport based on
-   [OkHttp](http://square.github.io/okhttp/). It is mainly for use on Android
-   and is for client only.
-3. The
-   [inProcess](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/inprocess)
-   transport is for when a server is in the same process as the client. It is
-   useful for testing.
+For instructions on how to use the language-specific gRPC runtime for a project, please refer to these documents
 
-#### Common
+ * [C++](src/cpp): follow the instructions under the `src/cpp` directory
+ * [C#](src/csharp): NuGet package `Grpc`
+ * [Dart](https://github.com/grpc/grpc-dart): pub package `grpc`
+ * [Go](https://github.com/grpc/grpc-go): `go get google.golang.org/grpc`
+ * [Java](https://github.com/grpc/grpc-java): Use JARs from Maven Central Repository
+ * [Kotlin](https://github.com/grpc/grpc-kotlin): Use JARs from Maven Central Repository
+ * [Node](https://github.com/grpc/grpc-node): `npm install grpc`
+ * [Objective-C](src/objective-c): Add `gRPC-ProtoRPC` dependency to podspec
+ * [PHP](src/php): `pecl install grpc`
+ * [Python](src/python/grpcio): `pip install grpcio`
+ * [Ruby](src/ruby): `gem install grpc`
+ * [WebJS](https://github.com/grpc/grpc-web): follow the grpc-web instructions
 
-* [Stream](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/Stream.java)
-* [Stream Listener](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/StreamListener.java)
+Per-language quickstart guides and tutorials can be found in the [documentation section on the grpc.io website](https://grpc.io/docs/). Code examples are available in the [examples](examples) directory.
 
-#### Client
+Precompiled bleeding-edge package builds of gRPC `master` branch's `HEAD` are uploaded daily to [packages.grpc.io](https://packages.grpc.io).
 
-* [Client Stream](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/ClientStream.java)
-* [Client Stream Listener](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/ClientStreamListener.java)
+# To start developing gRPC
 
-#### Server
+Contributions are welcome!
 
-* [Server Stream](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/ServerStream.java)
-* [Server Stream Listener](https://github.com/google/grpc-java/blob/master/core/src/main/java/io/grpc/internal/ServerStreamListener.java)
+Please read [How to contribute](CONTRIBUTING.md) which will guide you through the entire workflow of how to build the source code, how to run the tests, and how to contribute changes to
+the gRPC codebase.
+The "How to contribute" document also contains info on how the contribution process works and contains best practices for creating contributions.
 
+# Troubleshooting
 
-### Examples
+Sometimes things go wrong. Please check out the [Troubleshooting guide](TROUBLESHOOTING.md) if you are experiencing issues with gRPC.
 
-Tests showing how these layers are composed to execute calls using protobuf
-messages can be found here
-https://github.com/google/grpc-java/tree/master/interop-testing/src/main/java/io/grpc/testing/integration
+# Performance 
+
+See the [Performance dashboard](https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5180705743044608) for performance numbers of master branch daily builds.
+
+# Concepts
+
+See [gRPC Concepts](CONCEPTS.md)
+
+# About This Repository
+
+This repository contains source code for gRPC libraries implemented in multiple languages written on top of a shared C core library [src/core](src/core).
+
+Libraries in different languages may be in various states of development. We are seeking contributions for all of these libraries:
+
+| Language                | Source                              |
+|-------------------------|-------------------------------------|
+| Shared C [core library] | [src/core](src/core)                |
+| C++                     | [src/cpp](src/cpp)                  |
+| Ruby                    | [src/ruby](src/ruby)                |
+| Python                  | [src/python](src/python)            |
+| PHP                     | [src/php](src/php)                  |
+| C# (core library based) | [src/csharp](src/csharp)            |
+| Objective-C             | [src/objective-c](src/objective-c)  |
+
+| Language                | Source repo                                          |
+|-------------------------|------------------------------------------------------|
+| Java                    | [grpc-java](https://github.com/grpc/grpc-java)       |
+| Kotlin                  | [grpc-kotlin](https://github.com/grpc/grpc-kotlin)   |
+| Go                      | [grpc-go](https://github.com/grpc/grpc-go)           |
+| NodeJS                  | [grpc-node](https://github.com/grpc/grpc-node)       |
+| WebJS                   | [grpc-web](https://github.com/grpc/grpc-web)         |
+| Dart                    | [grpc-dart](https://github.com/grpc/grpc-dart)       |
+| .NET (pure C# impl.)    | [grpc-dotnet](https://github.com/grpc/grpc-dotnet)   |
diff --git a/third_party/grpc/build_defs.bzl b/third_party/grpc/build_defs.bzl
index 88290320dcf4da..215160c63b9ef4 100644
--- a/third_party/grpc/build_defs.bzl
+++ b/third_party/grpc/build_defs.bzl
@@ -67,7 +67,7 @@ _java_grpc_gensource = rule(
             allow_single_file = True,
         ),
         "_java_plugin": attr.label(
-            default = Label("@io_bazel//third_party/grpc:grpc-java-plugin"),
+            default = Label("@io_bazel//third_party/grpc-java:grpc-java-plugin"),
             executable = True,
             cfg = "host",
         ),
@@ -113,7 +113,7 @@ def java_grpc_library(name, srcs, deps, enable_deprecated = None, visibility = N
         deps = [
             "@io_bazel//third_party:javax_annotations",
             "@io_bazel//third_party:jsr305",
-            "@io_bazel//third_party/grpc:grpc-jar",
+            "@io_bazel//third_party/grpc-java:grpc-jar",
             "@io_bazel//third_party:guava",
             "@com_google_protobuf//:protobuf_java",
         ] + deps,
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diff --git a/third_party/grpc/grpc-stub-1.33.1.jar b/third_party/grpc/grpc-stub-1.33.1.jar
deleted file mode 100644
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diff --git a/third_party/grpc/grpc-stub-1.41.0.jar b/third_party/grpc/grpc-stub-1.41.0.jar
deleted file mode 100644
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diff --git a/third_party/grpc/grpc_1.33.1.patch b/third_party/grpc/grpc_1.33.1.patch
deleted file mode 100644
index dda6fc177e8a9b..00000000000000
--- a/third_party/grpc/grpc_1.33.1.patch
+++ /dev/null
@@ -1,122 +0,0 @@
-commit bb0d04663c7dc6c0096f8717cb4ec26330a5ae40
-Author: Yun Peng <pcloudy@google.com>
-Date:   Wed Jun 3 15:35:31 2020 +0200
-
-    Patch grpc v1.26.0 for Bazel build
-    
-    - Avoid loading dependencies that're not needed for the gRPC C++
-    libraries
-    - Add bazel mirror URL for upb and cares
-    - Redirect zlib to @//third_party/zlib
-    - Add darwin_arm64 and darwin_arm64e config settings to allow
-    building for Apple Silicon
-
-diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
-index 7bb6b8bdb9..7644107b70 100644
---- a/bazel/grpc_build_system.bzl
-+++ b/bazel/grpc_build_system.bzl
-@@ -25,7 +25,7 @@
- 
- load("//bazel:cc_grpc_library.bzl", "cc_grpc_library")
- load("@upb//bazel:upb_proto_library.bzl", "upb_proto_library")
--load("@build_bazel_rules_apple//apple:ios.bzl", "ios_unit_test")
-+# load("@build_bazel_rules_apple//apple:ios.bzl", "ios_unit_test")
- 
- # The set of pollers to test against if a test exercises polling
- POLLERS = ["epollex", "epoll1", "poll"]
-@@ -181,13 +181,13 @@ def ios_cc_test(
-             testonly = 1,
-         )
-         ios_test_deps = [ios_test_adapter, ":" + test_lib_ios]
--        ios_unit_test(
--            name = name + "_on_ios",
--            size = kwargs.get("size"),
--            tags = ios_tags,
--            minimum_os_version = "9.0",
--            deps = ios_test_deps,
--        )
-+        # ios_unit_test(
-+        #     name = name + "_on_ios",
-+        #     size = kwargs.get("size"),
-+        #     tags = ios_tags,
-+        #     minimum_os_version = "9.0",
-+        #     deps = ios_test_deps,
-+        # )
- 
- def grpc_cc_test(name, srcs = [], deps = [], external_deps = [], args = [], data = [], uses_polling = True, language = "C++", size = "medium", timeout = None, tags = [], exec_compatible_with = [], exec_properties = {}, shard_count = None, flaky = None):
-     copts = if_mac(["-DGRPC_CFSTREAM"])
-diff --git a/bazel/grpc_deps.bzl b/bazel/grpc_deps.bzl
-index 09fcad95a2..9b737e5deb 100644
---- a/bazel/grpc_deps.bzl
-+++ b/bazel/grpc_deps.bzl
-@@ -33,7 +33,7 @@ def grpc_deps():
- 
-     native.bind(
-         name = "madler_zlib",
--        actual = "@zlib//:zlib",
-+        actual = "@//third_party/zlib",
-     )
- 
-     native.bind(
-diff --git a/bazel/grpc_extra_deps.bzl b/bazel/grpc_extra_deps.bzl
-index 4c1dfad2e8..f63c54ddef 100644
---- a/bazel/grpc_extra_deps.bzl
-+++ b/bazel/grpc_extra_deps.bzl
-@@ -1,11 +1,6 @@
- """Loads the dependencies necessary for the external repositories defined in grpc_deps.bzl."""
- 
--load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
- load("@upb//bazel:workspace_deps.bzl", "upb_deps")
--load("@envoy_api//bazel:repositories.bzl", "api_dependencies")
--load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
--load("@build_bazel_rules_apple//apple:repositories.bzl", "apple_rules_dependencies")
--load("@build_bazel_apple_support//lib:repositories.bzl", "apple_support_dependencies")
- 
- def grpc_extra_deps():
-     """Loads the extra dependencies.
-@@ -26,15 +21,5 @@ def grpc_extra_deps():
-     grpc_extra_deps()
-     ```
-     """
--    protobuf_deps()
--
-     upb_deps()
- 
--    api_dependencies()
--
--    go_rules_dependencies()
--    go_register_toolchains()
--
--    apple_rules_dependencies()
--
--    apple_support_dependencies()
-diff --git a/third_party/cares/cares.BUILD b/third_party/cares/cares.BUILD
-index c047f0c515..7c24fbc617 100644
---- a/third_party/cares/cares.BUILD
-+++ b/third_party/cares/cares.BUILD
-@@ -10,6 +10,16 @@ config_setting(
-     values = {"cpu": "darwin_x86_64"},
- )
- 
-+config_setting(
-+    name = "darwin_arm64",
-+    values = {"cpu": "darwin_arm64"},
-+)
-+
-+config_setting(
-+    name = "darwin_arm64e",
-+    values = {"cpu": "darwin_arm64e"},
-+)
-+
- config_setting(
-     name = "windows",
-     values = {"cpu": "x64_windows"},
-@@ -99,6 +109,8 @@ copy_file(
-         ":watchos_arm64_32": "@com_github_grpc_grpc//third_party/cares:config_darwin/ares_config.h",
-         ":darwin": "@com_github_grpc_grpc//third_party/cares:config_darwin/ares_config.h",
-         ":darwin_x86_64": "@com_github_grpc_grpc//third_party/cares:config_darwin/ares_config.h",
-+        ":darwin_arm64": "@com_github_grpc_grpc//third_party/cares:config_darwin/ares_config.h",
-+        ":darwin_arm64e": "@com_github_grpc_grpc//third_party/cares:config_darwin/ares_config.h",
-         ":windows": "@com_github_grpc_grpc//third_party/cares:config_windows/ares_config.h",
-         ":android": "@com_github_grpc_grpc//third_party/cares:config_android/ares_config.h",
-         "//conditions:default": "@com_github_grpc_grpc//third_party/cares:config_linux/ares_config.h",
diff --git a/third_party/netty/LICENSE.txt b/third_party/netty/LICENSE.txt
index d645695673349e..62589edd12a37d 100644
--- a/third_party/netty/LICENSE.txt
+++ b/third_party/netty/LICENSE.txt
@@ -1,7 +1,7 @@
 
                                  Apache License
                            Version 2.0, January 2004
-                        http://www.apache.org/licenses/
+                        https://www.apache.org/licenses/
 
    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
@@ -193,7 +193,7 @@
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at
 
-       http://www.apache.org/licenses/LICENSE-2.0
+       https://www.apache.org/licenses/LICENSE-2.0
 
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
diff --git a/third_party/netty/README.md b/third_party/netty/README.md
index 9176ac5eaa9c53..f42f2208653605 100644
--- a/third_party/netty/README.md
+++ b/third_party/netty/README.md
@@ -10,6 +10,7 @@ Netty is an asynchronous event-driven network application framework for rapid de
 * [Downloads](https://netty.io/downloads.html)
 * [Documentation](https://netty.io/wiki/)
 * [@netty_project](https://twitter.com/netty_project)
+* [Official Discord server](https://discord.gg/q4aQ2XjaCa)
 
 ## How to build
 
@@ -17,9 +18,9 @@ For the detailed information about building and developing Netty, please visit [
 
 You require the following to build Netty:
 
-* Latest stable [OpenJDK 8](https://adoptopenjdk.net)
+* Latest stable [OpenJDK 8](https://adoptium.net/)
 * Latest stable [Apache Maven](https://maven.apache.org/)
-* If you are on Linux, you need [additional development packages](https://netty.io/wiki/native-transports.html) installed on your system, because you'll build the native transport.
+* If you are on Linux or MacOS, you need [additional development packages](https://netty.io/wiki/native-transports.html) installed on your system, because you'll build the native transport.
 
 Note that this is build-time requirement.  JDK 5 (for 3.x) or 6 (for 4.0+ / 4.1+) is enough to run your Netty-based application.
 
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