diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 6137bef2a..0bcf47a66 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -4,5 +4,9 @@
 # For syntax help see:
 # https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
 
+# The @googleapis/api-pubsub is the default owner for changes in this repo
+*                       @googleapis/yoshi-java @googleapis/api-pubsub
+**/*.java               @googleapis/api-pubsub
+
 # The java-samples-reviewers team is the default owner for samples changes
 samples/**/*.java       @googleapis/java-samples-reviewers
diff --git a/.github/readme/synth.py b/.github/readme/synth.py
new file mode 100644
index 000000000..7b48cc28d
--- /dev/null
+++ b/.github/readme/synth.py
@@ -0,0 +1,19 @@
+# Copyright 2020 Google LLC
+#
+# 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 script is used to synthesize generated the README for this library."""
+
+from synthtool.languages import java
+
+java.custom_templates(["java_library/README.md"])
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
new file mode 100644
index 000000000..6bddd18ea
--- /dev/null
+++ b/.github/sync-repo-settings.yaml
@@ -0,0 +1,49 @@
+
+# Whether or not rebase-merging is enabled on this repository.
+# Defaults to `true`
+rebaseMergeAllowed: false
+
+# Whether or not squash-merging is enabled on this repository.
+# Defaults to `true`
+squashMergeAllowed: true
+
+# Whether or not PRs are merged with a merge commit on this repository.
+# Defaults to `false`
+mergeCommitAllowed: false
+
+# Rules for master branch protection
+branchProtectionRules:
+# Identifies the protection rule pattern. Name of the branch to be protected.
+# Defaults to `master`
+- pattern: master
+  # Can admins overwrite branch protection.
+  # Defaults to `true`
+  isAdminEnforced: true
+  # Number of approving reviews required to update matching branches.
+  # Defaults to `1`
+  requiredApprovingReviewCount: 1
+  # Are reviews from code owners required to update matching branches.
+  # Defaults to `false`
+  requiresCodeOwnerReviews: true
+  # Require up to date branches
+  requiresStrictStatusChecks: false
+  # List of required status check contexts that must pass for commits to be accepted to matching branches.
+  requiredStatusCheckContexts:
+    - "dependencies (8)"
+    - "dependencies (11)"
+    - "linkage-monitor"
+    - "lint"
+    - "clirr"
+    - "units (7)"
+    - "units (8)"
+    - "units (11)"
+    - "Kokoro - Test: Integration"
+    - "cla/google"
+# List of explicit permissions to add (additive only)
+permissionRules:
+- team: yoshi-admins
+  permission: admin
+- team: yoshi-java-admins
+  permission: admin
+- team: yoshi-java
+  permission: push
\ No newline at end of file
diff --git a/.github/workflows/auto-release.yaml b/.github/workflows/auto-release.yaml
new file mode 100644
index 000000000..bc1554aec
--- /dev/null
+++ b/.github/workflows/auto-release.yaml
@@ -0,0 +1,88 @@
+on:
+  pull_request:
+name: auto-release
+jobs:
+  approve:
+    runs-on: ubuntu-latest
+    if: contains(github.head_ref, 'release-v')
+    steps:
+    - uses: actions/github-script@v3.0.0
+      with:
+        github-token: ${{secrets.YOSHI_APPROVER_TOKEN}}
+        debug: true
+        script: |
+          // only approve PRs from release-please[bot]
+          if (context.payload.pull_request.user.login !== "release-please[bot]") {
+            return;
+          }
+
+          // only approve PRs like "chore: release <release version>"
+          if ( !context.payload.pull_request.title.startsWith("chore: release") ) {
+            return;
+          }
+
+          // only approve PRs with pom.xml and versions.txt changes
+          const filesPromise = github.pulls.listFiles.endpoint({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            pull_number: context.payload.pull_request.number,
+          });
+          const changed_files = await github.paginate(filesPromise)
+
+          if ( changed_files.length < 1 ) {
+            console.log( "Not proceeding since PR is empty!" )
+            return;
+          }
+
+          if ( !changed_files.some(v => v.filename.includes("pom")) || !changed_files.some(v => v.filename.includes("versions.txt")) ) {
+            console.log( "PR file changes do not have pom.xml or versions.txt -- something is wrong. PTAL!" )
+            return;
+          }
+
+          // trigger auto-release when
+          // 1) it is a SNAPSHOT release (auto-generated post regular release)
+          // 2) there are dependency updates only
+          // 3) there are no open dependency update PRs in this repo (to avoid multiple releases)
+          if (
+            context.payload.pull_request.body.includes("Fix") ||
+            context.payload.pull_request.body.includes("Build") ||
+            context.payload.pull_request.body.includes("Documentation") ||
+            context.payload.pull_request.body.includes("BREAKING CHANGES") ||
+            context.payload.pull_request.body.includes("Features")
+          ) {
+            console.log( "Not auto-releasing since it is not a dependency-update-only release." );
+            return;
+          }
+
+          const promise = github.pulls.list.endpoint({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            state: 'open'
+          });
+          const open_pulls = await github.paginate(promise)
+
+          if ( open_pulls.length > 1 && !context.payload.pull_request.title.includes("SNAPSHOT") ) {
+            for ( const pull of open_pulls ) {
+              if ( pull.title.startsWith("deps: update dependency") ) {
+                console.log( "Not auto-releasing yet since there are dependency update PRs open in this repo." );
+                return;
+              }
+            }
+          }
+
+          // approve release PR
+          await github.pulls.createReview({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: 'Rubber stamped release!',
+            pull_number: context.payload.pull_request.number,
+            event: 'APPROVE'
+          });
+
+          // attach kokoro:force-run and automerge labels
+          await github.issues.addLabels({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.payload.pull_request.number,
+            labels: ['kokoro:force-run', 'automerge']
+          });
diff --git a/.github/workflows/samples.yaml b/.github/workflows/samples.yaml
new file mode 100644
index 000000000..c46230a78
--- /dev/null
+++ b/.github/workflows/samples.yaml
@@ -0,0 +1,14 @@
+on:
+  pull_request:
+name: samples
+jobs:
+  checkstyle:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 8
+      - name: Run checkstyle
+        run: mvn -P lint --quiet --batch-mode checkstyle:check
+        working-directory: samples/snippets
diff --git a/.kokoro/continuous/readme.cfg b/.kokoro/continuous/readme.cfg
new file mode 100644
index 000000000..cc3ada374
--- /dev/null
+++ b/.kokoro/continuous/readme.cfg
@@ -0,0 +1,55 @@
+# Copyright 2020 Google LLC
+#
+# 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.
+
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+  key: "TRAMPOLINE_IMAGE"
+  value: "gcr.io/cloud-devrel-kokoro-resources/python-multi"
+}
+
+env_vars: {
+  key: "TRAMPOLINE_BUILD_FILE"
+  value: "github/java-pubsub/.kokoro/readme.sh"
+}
+
+# Build logs will be here
+action {
+  define_artifacts {
+    regex: "**/*sponge_log.xml"
+    regex: "**/*sponge_log.log"
+  }
+}
+
+# The github token is stored here.
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73713
+      keyname: "yoshi-automation-github-key"
+      # TODO(theacodes): remove this after secrets have globally propagated
+      backend_type: FASTCONFIGPUSH
+    }
+  }
+}
+
+# Common env vars for all repositories and builds.
+env_vars: {
+    key: "GITHUB_USER"
+    value: "yoshi-automation"
+}
+env_vars: {
+    key: "GITHUB_EMAIL"
+    value: "yoshi-automation@google.com"
+}
diff --git a/.kokoro/readme.sh b/.kokoro/readme.sh
new file mode 100644
index 000000000..7c518941f
--- /dev/null
+++ b/.kokoro/readme.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+# Copyright 2020 Google LLC
+#
+# 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.
+
+set -eo pipefail
+
+cd ${KOKORO_ARTIFACTS_DIR}/github/java-pubsub
+
+# Disable buffering, so that the logs stream through.
+export PYTHONUNBUFFERED=1
+
+# Kokoro exposes this as a file, but the scripts expect just a plain variable.
+export GITHUB_TOKEN=$(cat ${KOKORO_KEYSTORE_DIR}/73713_yoshi-automation-github-key)
+
+# Setup git credentials
+echo "https://${GITHUB_TOKEN}:@github.com" >> ~/.git-credentials
+git config --global credential.helper 'store --file ~/.git-credentials'
+
+python3.6 -m pip install git+https://github.com/googleapis/synthtool.git#egg=gcp-synthtool
+python3.6 -m autosynth.synth \
+    --repository=googleapis/java-pubsub \
+    --synth-file-name=.github/readme/synth.py \
+    --metadata-path=.github/readme/synth.metadata \
+    --pr-title="chore: regenerate README" \
+    --branch-suffix="readme"
\ No newline at end of file
diff --git a/.kokoro/release/stage.cfg b/.kokoro/release/stage.cfg
index a27131cf4..587130b55 100644
--- a/.kokoro/release/stage.cfg
+++ b/.kokoro/release/stage.cfg
@@ -13,32 +13,7 @@ action {
   }
 }
 
-# Fetch the token needed for reporting release status to GitHub
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "yoshi-automation-github-key"
-    }
-  }
-}
-
-# Fetch magictoken to use with Magic Github Proxy
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "releasetool-magictoken"
-    }
-  }
-}
-
-# Fetch api key to use with Magic Github Proxy
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "magic-github-proxy-api-key"
-    }
-  }
+env_vars: {
+  key: "SECRET_MANAGER_KEYS"
+  value: "releasetool-publish-reporter-app,releasetool-publish-reporter-googleapis-installation,releasetool-publish-reporter-pem"
 }
diff --git a/.repo-metadata.json b/.repo-metadata.json
index 84ee73390..93da177cf 100644
--- a/.repo-metadata.json
+++ b/.repo-metadata.json
@@ -11,6 +11,7 @@
   "repo": "googleapis/java-pubsub",
   "repo_short": "java-pubsub",
   "distribution_name": "com.google.cloud:google-cloud-pubsub",
+  "codeowner_team": "@googleapis/api-pubsub",
   "api_id": "pubsub.googleapis.com",
   "requires_billing": true
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44efc6958..beff31460 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+### [1.108.3](https://www.github.com/googleapis/java-pubsub/compare/v1.108.2...v1.108.3) (2020-10-02)
+
+
+### Bug Fixes
+
+* ensure proper cleanup of publisher in tests ([#310](https://www.github.com/googleapis/java-pubsub/issues/310)) ([b2b2f86](https://www.github.com/googleapis/java-pubsub/commit/b2b2f8694b925aad95e891cbd0d89426989fec59))
+* Ensure that messages that are in pending batches for an ordering key are canceled when a previous publish for the ordering keys fails ([#366](https://www.github.com/googleapis/java-pubsub/issues/366)) ([7cdf8bc](https://www.github.com/googleapis/java-pubsub/commit/7cdf8bcf71a6c141f8b751b41fb2e055a75a4022))
+* make subscriberIT test less flaky ([#340](https://www.github.com/googleapis/java-pubsub/issues/340)) ([5d4f534](https://www.github.com/googleapis/java-pubsub/commit/5d4f5345b13171a47f022d34d39609c2f4329069))
+* Only check keyHasError if ordering key is non-empty ([#367](https://www.github.com/googleapis/java-pubsub/issues/367)) ([8b2d0b7](https://www.github.com/googleapis/java-pubsub/commit/8b2d0b73a46e6b91795ad05a8dd0f626249c4f30))
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.10.0 ([#357](https://www.github.com/googleapis/java-pubsub/issues/357)) ([3b3616c](https://www.github.com/googleapis/java-pubsub/commit/3b3616c524059fb8a87bf30a66c481000046132a))
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.9.0 ([#337](https://www.github.com/googleapis/java-pubsub/issues/337)) ([8cf77ee](https://www.github.com/googleapis/java-pubsub/commit/8cf77ee3b31356f342942a9ffaa61db2d0686769))
+
 ### [1.108.2](https://www.github.com/googleapis/java-pubsub/compare/v1.108.1...v1.108.2) (2020-08-21)
 
 
diff --git a/README.md b/README.md
index 2a286e2bc..19076360a 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>9.1.0</version>
+      <version>10.1.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -47,11 +47,11 @@ If you are using Maven without BOM, add this to your dependencies:
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-pubsub:1.108.2'
+compile 'com.google.cloud:google-cloud-pubsub:1.108.3'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.108.2"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.108.3"
 ```
 [//]: # ({x-version-update-end})
 
@@ -232,6 +232,7 @@ has instructions for running the samples.
 | Create Topic Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/CreateTopicExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/CreateTopicExample.java) |
 | Delete Subscription Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/DeleteSubscriptionExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/DeleteSubscriptionExample.java) |
 | Delete Topic Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/DeleteTopicExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/DeleteTopicExample.java) |
+| Detach Subscription Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/DetachSubscriptionExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/DetachSubscriptionExample.java) |
 | Get Subscription Policy Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/GetSubscriptionPolicyExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/GetSubscriptionPolicyExample.java) |
 | Get Topic Policy Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/GetTopicPolicyExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/GetTopicPolicyExample.java) |
 | List Subscriptions In Project Example | [source code](https://github.com/googleapis/java-pubsub/blob/master/samples/snippets/src/main/java/pubsub/ListSubscriptionsInProjectExample.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-pubsub&page=editor&open_in_editor=samples/snippets/src/main/java/pubsub/ListSubscriptionsInProjectExample.java) |
diff --git a/google-cloud-pubsub-bom/pom.xml b/google-cloud-pubsub-bom/pom.xml
index 0d0fc01c5..744cb5254 100644
--- a/google-cloud-pubsub-bom/pom.xml
+++ b/google-cloud-pubsub-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub-bom</artifactId>
-  <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+  <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -64,17 +64,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-pubsub-v1</artifactId>
-        <version>1.90.2</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
+        <version>1.90.3</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-pubsub-v1</artifactId>
-        <version>1.90.2</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
+        <version>1.90.3</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsub</artifactId>
-        <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+        <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-pubsub/pom.xml b/google-cloud-pubsub/pom.xml
index 7d4f513d0..e9dc2258d 100644
--- a/google-cloud-pubsub/pom.xml
+++ b/google-cloud-pubsub/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub</artifactId>
-  <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+  <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Pub/Sub</name>
   <url>https://github.com/googleapis/java-pubsub</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsub-parent</artifactId>
-    <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+    <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-pubsub</site.installationModule>
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Publisher.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Publisher.java
index 6a9f68659..07a550496 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Publisher.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Publisher.java
@@ -256,6 +256,11 @@ public ApiFuture<String> publish(PubsubMessage message) {
     List<OutstandingBatch> batchesToSend;
     messagesBatchLock.lock();
     try {
+      if (!orderingKey.isEmpty() && sequentialExecutor.keyHasError(orderingKey)) {
+        outstandingPublish.publishResult.setException(
+            SequentialExecutorService.CallbackExecutor.CANCELLATION_EXCEPTION);
+        return outstandingPublish.publishResult;
+      }
       MessagesBatch messagesBatch = messagesBatches.get(orderingKey);
       if (messagesBatch == null) {
         messagesBatch = new MessagesBatch(batchingSettings, orderingKey);
@@ -462,6 +467,21 @@ public void onSuccess(PublishResponse result) {
           @Override
           public void onFailure(Throwable t) {
             try {
+              if (outstandingBatch.orderingKey != null && !outstandingBatch.orderingKey.isEmpty()) {
+                messagesBatchLock.lock();
+                try {
+                  MessagesBatch messagesBatch = messagesBatches.get(outstandingBatch.orderingKey);
+                  if (messagesBatch != null) {
+                    for (OutstandingPublish outstanding : messagesBatch.messages) {
+                      outstanding.publishResult.setException(
+                          SequentialExecutorService.CallbackExecutor.CANCELLATION_EXCEPTION);
+                    }
+                    messagesBatches.remove(outstandingBatch.orderingKey);
+                  }
+                } finally {
+                  messagesBatchLock.unlock();
+                }
+              }
               outstandingBatch.onFailure(t);
             } finally {
               messagesWaiter.incrementPendingCount(-outstandingBatch.size());
diff --git a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SequentialExecutorService.java b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SequentialExecutorService.java
index 292921850..4866e6be4 100644
--- a/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SequentialExecutorService.java
+++ b/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SequentialExecutorService.java
@@ -243,6 +243,10 @@ public void cancel(Throwable e) {
       return future;
     }
 
+    boolean keyHasError(String key) {
+      return keysWithErrors.contains(key);
+    }
+
     void resumePublish(String key) {
       keysWithErrors.remove(key);
     }
diff --git a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/PublisherImplTest.java b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/PublisherImplTest.java
index c68367601..e5a785aed 100644
--- a/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/PublisherImplTest.java
+++ b/google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/v1/PublisherImplTest.java
@@ -31,8 +31,10 @@
 import com.google.api.gax.core.FixedExecutorProvider;
 import com.google.api.gax.core.InstantiatingExecutorProvider;
 import com.google.api.gax.core.NoCredentialsProvider;
+import com.google.api.gax.grpc.GrpcTransportChannel;
 import com.google.api.gax.grpc.testing.LocalChannelProvider;
 import com.google.api.gax.rpc.DataLossException;
+import com.google.api.gax.rpc.FixedTransportChannelProvider;
 import com.google.api.gax.rpc.TransportChannelProvider;
 import com.google.cloud.pubsub.v1.Publisher.Builder;
 import com.google.protobuf.ByteString;
@@ -40,9 +42,11 @@
 import com.google.pubsub.v1.PublishRequest;
 import com.google.pubsub.v1.PublishResponse;
 import com.google.pubsub.v1.PubsubMessage;
+import io.grpc.ManagedChannel;
 import io.grpc.Server;
 import io.grpc.Status;
 import io.grpc.StatusException;
+import io.grpc.inprocess.InProcessChannelBuilder;
 import io.grpc.inprocess.InProcessServerBuilder;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
@@ -75,6 +79,8 @@ public class PublisherImplTest {
 
   private FakePublisherServiceImpl testPublisherServiceImpl;
 
+  private ManagedChannel testChannel;
+
   private Server testServer;
 
   @Before
@@ -84,6 +90,7 @@ public void setUp() throws Exception {
     InProcessServerBuilder serverBuilder = InProcessServerBuilder.forName("test-server");
     serverBuilder.addService(testPublisherServiceImpl);
     testServer = serverBuilder.build();
+    testChannel = InProcessChannelBuilder.forName("test-server").build();
     testServer.start();
 
     fakeExecutor = new FakeScheduledExecutorService();
@@ -92,6 +99,7 @@ public void setUp() throws Exception {
   @After
   public void tearDown() throws Exception {
     testServer.shutdownNow().awaitTermination();
+    testChannel.shutdown();
   }
 
   @Test
@@ -122,8 +130,7 @@ public void testPublishByDuration() throws Exception {
     assertEquals("2", publishFuture2.get());
 
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().get(0).getMessagesCount());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -160,8 +167,9 @@ public void testPublishByNumBatchedMessages() throws Exception {
 
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().get(0).getMessagesCount());
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().get(1).getMessagesCount());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+
+    fakeExecutor.advanceTime(Duration.ofSeconds(100));
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -195,8 +203,9 @@ public void testSinglePublishByNumBytes() throws Exception {
     assertEquals("4", publishFuture4.get());
 
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().size());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+
+    fakeExecutor.advanceTime(Duration.ofSeconds(100));
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -219,15 +228,16 @@ public void testPublishByShutdown() throws Exception {
 
     // Note we are not advancing time or reaching the count threshold but messages should
     // still get published by call to shutdown
-
     publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
 
     // Verify the publishes completed
     assertTrue(publishFuture1.isDone());
     assertTrue(publishFuture2.isDone());
     assertEquals("1", publishFuture1.get());
     assertEquals("2", publishFuture2.get());
+
+    fakeExecutor.advanceTime(Duration.ofSeconds(100));
+    publisher.awaitTermination(1, TimeUnit.MINUTES);
   }
 
   @Test
@@ -269,8 +279,7 @@ public void testPublishMixedSizeAndDuration() throws Exception {
 
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().get(0).getMessagesCount());
     assertEquals(1, testPublisherServiceImpl.getCapturedRequests().get(1).getMessagesCount());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    shutdownTestPublisher(publisher);
   }
 
   private ApiFuture<String> sendTestMessage(Publisher publisher, String data) {
@@ -326,7 +335,9 @@ public void testBatchedMessagesWithOrderingKeyByNum() throws Exception {
         }
       }
     }
-    publisher.shutdown();
+
+    fakeExecutor.advanceTime(Duration.ofSeconds(100));
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -389,7 +400,7 @@ public void testBatchedMessagesWithOrderingKeyByDuration() throws Exception {
         }
       }
     }
-    publisher.shutdown();
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -418,7 +429,8 @@ public void testLargeMessagesDoNotReorderBatches() throws Exception {
     // Verify that messages with "OrderB" were delivered in order.
     assertTrue(Integer.parseInt(publishFuture2.get()) < Integer.parseInt(publishFuture3.get()));
 
-    publisher.shutdown();
+    fakeExecutor.advanceTime(Duration.ofSeconds(100));
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -431,7 +443,7 @@ public void testOrderingKeyWhenDisabled_throwsException() throws Exception {
     } catch (IllegalStateException expected) {
       // expected
     }
-    publisher.shutdown();
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -461,6 +473,7 @@ public void testEnableMessageOrdering_overwritesMaxAttempts() throws Exception {
 
     assertEquals(4, testPublisherServiceImpl.getCapturedRequests().size());
     publisher.shutdown();
+    assertTrue(publisher.awaitTermination(1, TimeUnit.MINUTES));
   }
 
   @Test
@@ -550,7 +563,58 @@ public void testResumePublish() throws Exception {
     Assert.assertEquals("7", future7.get());
     Assert.assertEquals("8", future8.get());
 
-    publisher.shutdown();
+    shutdownTestPublisher(publisher);
+  }
+
+  @Test
+  public void testPublishThrowExceptionForUnsubmittedOrderingKeyMessage() throws Exception {
+    Publisher publisher =
+        getTestPublisherBuilder()
+            .setExecutorProvider(SINGLE_THREAD_EXECUTOR)
+            .setBatchingSettings(
+                Publisher.Builder.DEFAULT_BATCHING_SETTINGS
+                    .toBuilder()
+                    .setElementCountThreshold(2L)
+                    .setDelayThreshold(Duration.ofSeconds(500))
+                    .build())
+            .setEnableMessageOrdering(true)
+            .build();
+
+    // Send two messages that will fulfill the first batch, which will return a failure.
+    testPublisherServiceImpl.addPublishError(new StatusException(Status.INVALID_ARGUMENT));
+    ApiFuture<String> publishFuture1 = sendTestMessageWithOrderingKey(publisher, "A", "a");
+    ApiFuture<String> publishFuture2 = sendTestMessageWithOrderingKey(publisher, "B", "a");
+
+    // A third message will fail because the first attempt to publish failed.
+    ApiFuture<String> publishFuture3 = sendTestMessageWithOrderingKey(publisher, "C", "a");
+
+    try {
+      publishFuture1.get();
+      fail("Should have failed.");
+    } catch (ExecutionException e) {
+    }
+
+    try {
+      publishFuture2.get();
+      fail("Should have failed.");
+    } catch (ExecutionException e) {
+    }
+
+    try {
+      publishFuture3.get();
+      fail("Should have failed.");
+    } catch (ExecutionException e) {
+      assertEquals(SequentialExecutorService.CallbackExecutor.CANCELLATION_EXCEPTION, e.getCause());
+    }
+
+    // A subsequent attempt fails immediately.
+    ApiFuture<String> publishFuture4 = sendTestMessageWithOrderingKey(publisher, "D", "a");
+    try {
+      publishFuture4.get();
+      fail("Should have failed.");
+    } catch (ExecutionException e) {
+      assertEquals(SequentialExecutorService.CallbackExecutor.CANCELLATION_EXCEPTION, e.getCause());
+    }
   }
 
   private ApiFuture<String> sendTestMessageWithOrderingKey(
@@ -604,8 +668,7 @@ public void testPublishFailureRetries() throws Exception {
     assertEquals("1", publishFuture1.get());
 
     assertEquals(2, testPublisherServiceImpl.getCapturedRequests().size());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    shutdownTestPublisher(publisher);
   }
 
   @Test(expected = ExecutionException.class)
@@ -629,8 +692,7 @@ public void testPublishFailureRetries_retriesDisabled() throws Exception {
       publishFuture1.get();
     } finally {
       assertSame(testPublisherServiceImpl.getCapturedRequests().size(), 1);
-      publisher.shutdown();
-      publisher.awaitTermination(1, TimeUnit.MINUTES);
+      shutdownTestPublisher(publisher);
     }
   }
 
@@ -656,8 +718,7 @@ public void testPublishFailureRetries_maxRetriesSetup() throws Exception {
     assertEquals("1", publishFuture1.get());
 
     assertEquals(3, testPublisherServiceImpl.getCapturedRequests().size());
-    publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    shutdownTestPublisher(publisher);
   }
 
   @Test
@@ -683,7 +744,7 @@ public void testPublishFailureRetries_maxRetriesSetUnlimited() throws Exception
 
     assertEquals(3, testPublisherServiceImpl.getCapturedRequests().size());
     publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    assertTrue(publisher.awaitTermination(1, TimeUnit.MINUTES));
   }
 
   @Test(expected = ExecutionException.class)
@@ -712,14 +773,15 @@ public void testPublishFailureRetries_nonRetryableFailsImmediately() throws Exce
     } finally {
       assertTrue(testPublisherServiceImpl.getCapturedRequests().size() >= 1);
       publisher.shutdown();
-      publisher.awaitTermination(1, TimeUnit.MINUTES);
+      assertTrue(publisher.awaitTermination(1, TimeUnit.MINUTES));
     }
   }
 
   @Test
   public void testPublisherGetters() throws Exception {
     Publisher.Builder builder = Publisher.newBuilder(TEST_TOPIC);
-    builder.setChannelProvider(TEST_CHANNEL_PROVIDER);
+    builder.setChannelProvider(
+        FixedTransportChannelProvider.create(GrpcTransportChannel.create(testChannel)));
     builder.setExecutorProvider(SINGLE_THREAD_EXECUTOR);
     builder.setBatchingSettings(
         BatchingSettings.newBuilder()
@@ -735,7 +797,7 @@ public void testPublisherGetters() throws Exception {
     assertEquals(Duration.ofMillis(11), publisher.getBatchingSettings().getDelayThreshold());
     assertEquals(12, (long) publisher.getBatchingSettings().getElementCountThreshold());
     publisher.shutdown();
-    publisher.awaitTermination(1, TimeUnit.MINUTES);
+    assertTrue(publisher.awaitTermination(1, TimeUnit.MINUTES));
   }
 
   @Test
@@ -1115,7 +1177,14 @@ public void run() {
   private Builder getTestPublisherBuilder() {
     return Publisher.newBuilder(TEST_TOPIC)
         .setExecutorProvider(FixedExecutorProvider.create(fakeExecutor))
-        .setChannelProvider(TEST_CHANNEL_PROVIDER)
+        .setChannelProvider(
+            FixedTransportChannelProvider.create(GrpcTransportChannel.create(testChannel)))
         .setCredentialsProvider(NoCredentialsProvider.create());
   }
+
+  private void shutdownTestPublisher(Publisher publisher) throws InterruptedException {
+    publisher.shutdown();
+    fakeExecutor.advanceTime(Duration.ofSeconds(10));
+    assertTrue(publisher.awaitTermination(1, TimeUnit.MINUTES));
+  }
 }
diff --git a/grpc-google-cloud-pubsub-v1/pom.xml b/grpc-google-cloud-pubsub-v1/pom.xml
index 082c5db61..40aa0b950 100644
--- a/grpc-google-cloud-pubsub-v1/pom.xml
+++ b/grpc-google-cloud-pubsub-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-pubsub-v1</artifactId>
-  <version>1.90.2</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
+  <version>1.90.3</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
   <name>grpc-google-cloud-pubsub-v1</name>
   <description>GRPC library for grpc-google-cloud-pubsub-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsub-parent</artifactId>
-    <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+    <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 3bd96fce4..d172fd516 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-pubsub-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+  <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   <name>Google Cloud Pub/Sub Parent</name>
   <url>https://github.com/googleapis/java-pubsub</url>
   <description>
@@ -70,7 +70,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-shared-dependencies</artifactId>
-        <version>0.8.6</version>
+        <version>0.10.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
@@ -78,17 +78,17 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-pubsub-v1</artifactId>
-        <version>1.90.2</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
+        <version>1.90.3</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-pubsub-v1</artifactId>
-        <version>1.90.2</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
+        <version>1.90.3</version><!-- {x-version-update:grpc-google-cloud-pubsub-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-pubsub</artifactId>
-        <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+        <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
       </dependency>
 
       <dependency>
@@ -148,7 +148,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-project-info-reports-plugin</artifactId>
-        <version>3.1.0</version>
+        <version>3.1.1</version>
         <reportSets>
           <reportSet>
             <reports>
diff --git a/proto-google-cloud-pubsub-v1/pom.xml b/proto-google-cloud-pubsub-v1/pom.xml
index fd2ef5a63..24e74d4f9 100644
--- a/proto-google-cloud-pubsub-v1/pom.xml
+++ b/proto-google-cloud-pubsub-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-pubsub-v1</artifactId>
-  <version>1.90.2</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
+  <version>1.90.3</version><!-- {x-version-update:proto-google-cloud-pubsub-v1:current} -->
   <name>proto-google-cloud-pubsub-v1</name>
   <description>PROTO library for proto-google-cloud-pubsub-v1</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-pubsub-parent</artifactId>
-    <version>1.108.2</version><!-- {x-version-update:google-cloud-pubsub:current} -->
+    <version>1.108.3</version><!-- {x-version-update:google-cloud-pubsub:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/install-without-bom/pom.xml b/samples/install-without-bom/pom.xml
index 078c3d50f..331f50703 100644
--- a/samples/install-without-bom/pom.xml
+++ b/samples/install-without-bom/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.0.18</version>
+    <version>1.0.21</version>
   </parent>
 
   <properties>
diff --git a/samples/pom.xml b/samples/pom.xml
index a962f9780..aee27735f 100644
--- a/samples/pom.xml
+++ b/samples/pom.xml
@@ -33,7 +33,7 @@
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.0.18</version>
+    <version>1.0.21</version>
   </parent>
 
   <properties>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index 8d759f124..14f83deac 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.0.18</version>
+    <version>1.0.21</version>
   </parent>
 
   <properties>
@@ -43,7 +43,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.108.2</version>
+      <version>1.108.3</version>
     </dependency>
     <!-- {x-version-update-end} -->
 
diff --git a/samples/snippets/pom.xml b/samples/snippets/pom.xml
index 7468d0906..54643aa91 100644
--- a/samples/snippets/pom.xml
+++ b/samples/snippets/pom.xml
@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.google.cloud.samples</groupId>
     <artifactId>shared-configuration</artifactId>
-    <version>1.0.18</version>
+    <version>1.0.21</version>
   </parent>
 
   <properties>
@@ -45,7 +45,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
-        <version>9.1.0</version>
+        <version>11.0.0</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/samples/snippets/src/main/java/pubsub/CreateTopicExample.java b/samples/snippets/src/main/java/pubsub/CreateTopicExample.java
index 2b99be65d..3417be7c5 100644
--- a/samples/snippets/src/main/java/pubsub/CreateTopicExample.java
+++ b/samples/snippets/src/main/java/pubsub/CreateTopicExample.java
@@ -17,6 +17,7 @@
 package pubsub;
 
 // [START pubsub_create_topic]
+// [START pubsub_quickstart_create_topic]
 
 import com.google.cloud.pubsub.v1.TopicAdminClient;
 import com.google.pubsub.v1.Topic;
@@ -41,3 +42,5 @@ public static void createTopicExample(String projectId, String topicId) throws I
   }
 }
 // [END pubsub_create_topic]
+// [END pubsub_quickstart_create_topic]
+
diff --git a/samples/snippets/src/main/java/pubsub/DetachSubscriptionExample.java b/samples/snippets/src/main/java/pubsub/DetachSubscriptionExample.java
new file mode 100644
index 000000000..ac04c1c90
--- /dev/null
+++ b/samples/snippets/src/main/java/pubsub/DetachSubscriptionExample.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * 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.
+ */
+
+package pubsub;
+
+// [START pubsub_detach_subscription]
+import com.google.cloud.pubsub.v1.SubscriptionAdminClient;
+import com.google.cloud.pubsub.v1.TopicAdminClient;
+import com.google.pubsub.v1.DetachSubscriptionRequest;
+import com.google.pubsub.v1.ProjectSubscriptionName;
+import com.google.pubsub.v1.Subscription;
+import java.io.IOException;
+
+public class DetachSubscriptionExample {
+  public static void main(String... args) throws Exception {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectId = "your-project-id";
+    // Choose an existing subscription.
+    String subscriptionId = "your-subscription-id";
+
+    detachSubscriptionExample(projectId, subscriptionId);
+  }
+
+  public static void detachSubscriptionExample(String projectId, String subscriptionId)
+      throws IOException {
+    ProjectSubscriptionName subscriptionName =
+        ProjectSubscriptionName.of(projectId, subscriptionId);
+
+    try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
+      topicAdminClient.detachSubscription(
+          DetachSubscriptionRequest.newBuilder()
+              .setSubscription(subscriptionName.toString())
+              .build());
+    }
+
+    try (SubscriptionAdminClient subscriptionAdminClient = SubscriptionAdminClient.create()) {
+      Subscription subscription = subscriptionAdminClient.getSubscription(subscriptionName);
+      if (subscription.getDetached()) {
+        System.out.println("Subscription is detached.");
+      } else {
+        System.out.println("Subscription is NOT detached.");
+      }
+    }
+  }
+}
+// [END pubsub_detach_subscription]
\ No newline at end of file
diff --git a/samples/snippets/src/main/java/pubsub/PublishWithOrderingKeys.java b/samples/snippets/src/main/java/pubsub/PublishWithOrderingKeys.java
index 9f7757707..d199e7ff8 100644
--- a/samples/snippets/src/main/java/pubsub/PublishWithOrderingKeys.java
+++ b/samples/snippets/src/main/java/pubsub/PublishWithOrderingKeys.java
@@ -47,6 +47,8 @@ public static void publishWithOrderingKeysExample(String projectId, String topic
     // Create a publisher and set message ordering to true.
     Publisher publisher =
         Publisher.newBuilder(topicName)
+            // Sending messages to the same region ensures they are received in order
+            // even when multiple publishers are used.
             .setEndpoint("us-east1-pubsub.googleapis.com:443")
             .setEnableMessageOrdering(true)
             .build();
diff --git a/samples/snippets/src/main/java/pubsub/PublisherExample.java b/samples/snippets/src/main/java/pubsub/PublisherExample.java
index 069c2e4d5..e4dc39a89 100644
--- a/samples/snippets/src/main/java/pubsub/PublisherExample.java
+++ b/samples/snippets/src/main/java/pubsub/PublisherExample.java
@@ -17,6 +17,7 @@
 package pubsub;
 
 // [START pubsub_quickstart_publisher]
+// [START pubsub_publish]
 
 import com.google.api.core.ApiFuture;
 import com.google.cloud.pubsub.v1.Publisher;
@@ -63,3 +64,4 @@ public static void publisherExample(String projectId, String topicId)
   }
 }
 // [END pubsub_quickstart_publisher]
+// [END pubsub_publish]
diff --git a/samples/snippets/src/main/java/pubsub/RemoveDeadLetterPolicyExample.java b/samples/snippets/src/main/java/pubsub/RemoveDeadLetterPolicyExample.java
index 842657b08..04718d419 100644
--- a/samples/snippets/src/main/java/pubsub/RemoveDeadLetterPolicyExample.java
+++ b/samples/snippets/src/main/java/pubsub/RemoveDeadLetterPolicyExample.java
@@ -46,9 +46,6 @@ public static void removeDeadLetterPolicyExample(
           ProjectSubscriptionName.of(projectId, subscriptionId);
       TopicName topicName = TopicName.of(projectId, topicId);
 
-      System.out.println(
-          "Before: " + subscriptionAdminClient.getSubscription(subscriptionName).getAllFields());
-
       // Construct the subscription you expect to have after the request. Here,
       // values in the required fields (name, topic) help identify the subscription.
       // No dead letter policy is supplied.
@@ -61,9 +58,7 @@ public static void removeDeadLetterPolicyExample(
       // Construct a field mask to indicate which field to update in the subscription.
       FieldMask updateMask =
           FieldMask.newBuilder()
-              .addPaths("dead_letter_policy.dead_letter_topic")
-              // A default of 5 is applied upon successful update.
-              .addPaths("dead_letter_policy.max_delivery_attempts")
+              .addPaths("dead_letter_policy")
               .build();
 
       UpdateSubscriptionRequest request =
diff --git a/samples/snippets/src/test/java/pubsub/AdminIT.java b/samples/snippets/src/test/java/pubsub/AdminIT.java
index 6aa64f7c8..42825d63a 100644
--- a/samples/snippets/src/test/java/pubsub/AdminIT.java
+++ b/samples/snippets/src/test/java/pubsub/AdminIT.java
@@ -82,14 +82,16 @@ public void tearDown() throws Exception {
         subscriptionAdminClient.deleteSubscription(pullSubscriptionName);
         subscriptionAdminClient.deleteSubscription(pushSubscriptionName);
         subscriptionAdminClient.deleteSubscription(orderedSubscriptionName);
-      } catch (NotFoundException e) {
+      } catch (NotFoundException ignored) {
+        // ignore this as resources may not have been created
       }
     }
 
     // Delete the topic if it has not been cleaned.
     try (TopicAdminClient topicAdminClient = TopicAdminClient.create()) {
       topicAdminClient.deleteTopic(topicName.toString());
-    } catch (NotFoundException e) {
+    } catch (NotFoundException ignored) {
+      // ignore this as resources may not have been created
     }
     System.setOut(null);
   }
@@ -169,6 +171,11 @@ public void testAdmin() throws Exception {
     assertThat(bout.toString()).contains("permissions: \"pubsub.subscriptions.consume\"");
     assertThat(bout.toString()).contains("permissions: \"pubsub.subscriptions.update\"");
 
+    bout.reset();
+    // Test subscription detachment.
+    DetachSubscriptionExample.detachSubscriptionExample(projectId, pullSubscriptionId);
+    assertThat(bout.toString()).contains("Subscription is detached.");
+
     bout.reset();
     // Test create a subscription with ordering
     CreateSubscriptionWithOrdering.createSubscriptionWithOrderingExample(
@@ -176,6 +183,7 @@ public void testAdmin() throws Exception {
     assertThat(bout.toString()).contains("Created a subscription with ordering");
     assertThat(bout.toString()).contains("enable_message_ordering=true");
 
+
     bout.reset();
     // Test delete subscription. Run twice to delete both pull and push subscriptions.
     DeleteSubscriptionExample.deleteSubscriptionExample(projectId, pullSubscriptionId);
diff --git a/samples/snippets/src/test/java/pubsub/DeadLetterQueueIT.java b/samples/snippets/src/test/java/pubsub/DeadLetterQueueIT.java
index 73071a6eb..5b342612e 100644
--- a/samples/snippets/src/test/java/pubsub/DeadLetterQueueIT.java
+++ b/samples/snippets/src/test/java/pubsub/DeadLetterQueueIT.java
@@ -138,7 +138,6 @@ public void testQuickstart() throws Exception {
     bout.reset();
     // Remove dead letter policy.
     RemoveDeadLetterPolicyExample.removeDeadLetterPolicyExample(projectId, subscriptionId, topicId);
-    assertThat(bout.toString())
-        .contains("google.pubsub.v1.Subscription.dead_letter_policy=max_delivery_attempts: 5");
+    assertThat(bout.toString()).doesNotContain("dead_letter_policy");
   }
 }
diff --git a/samples/snippets/src/test/java/pubsub/SubscriberIT.java b/samples/snippets/src/test/java/pubsub/SubscriberIT.java
index be9e4e3d2..f69acd8cb 100644
--- a/samples/snippets/src/test/java/pubsub/SubscriberIT.java
+++ b/samples/snippets/src/test/java/pubsub/SubscriberIT.java
@@ -165,19 +165,19 @@ public void testSubscriber() throws Exception {
       assertThat(bout.toString()).contains("Data: Hello " + i);
     }
 
-    publishSomeMessages(10);
+    publishSomeMessages(3);
     bout.reset();
     // Test subscribe synchronously.
     SubscribeSyncExample.subscribeSyncExample(projectId, subscriptionId, 10);
-    for (int i = 0; i < 10; i++) {
+    for (int i = 0; i < 3; i++) {
       assertThat(bout.toString()).contains("Hello " + i);
     }
 
-    publishSomeMessages(10);
+    publishSomeMessages(3);
     bout.reset();
     // Test subscribe synchronously with lease management.
     SubscribeSyncWithLeaseExample.subscribeSyncWithLeaseExample(projectId, subscriptionId, 10);
-    for (int i = 0; i < 10; i++) {
+    for (int i = 0; i < 3; i++) {
       assertThat(bout.toString()).contains("Hello " + i);
     }
   }
diff --git a/synth.metadata b/synth.metadata
index af4f10162..0d9ab722b 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-pubsub.git",
-        "sha": "dda3079f6043330e38a880164a2ee6ededb7f225"
+        "sha": "5ed70e2f5d4d7c44fcf96feee499e9fb59e5546f"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "f8823dec98277a9516f2fb6fae9f58b3a59a23e1"
+        "sha": "8a7a3021fe97aa0a3641db642fe2b767f1c8110f"
       }
     }
   ],
@@ -40,9 +40,12 @@
     ".github/ISSUE_TEMPLATE/feature_request.md",
     ".github/ISSUE_TEMPLATE/support_request.md",
     ".github/PULL_REQUEST_TEMPLATE.md",
+    ".github/readme/synth.py",
     ".github/release-please.yml",
     ".github/trusted-contribution.yml",
+    ".github/workflows/auto-release.yaml",
     ".github/workflows/ci.yaml",
+    ".github/workflows/samples.yaml",
     ".kokoro/build.bat",
     ".kokoro/build.sh",
     ".kokoro/coerce_logs.sh",
@@ -50,6 +53,7 @@
     ".kokoro/common.sh",
     ".kokoro/continuous/common.cfg",
     ".kokoro/continuous/java8.cfg",
+    ".kokoro/continuous/readme.cfg",
     ".kokoro/dependencies.sh",
     ".kokoro/linkage-monitor.sh",
     ".kokoro/nightly/common.cfg",
@@ -73,6 +77,7 @@
     ".kokoro/presubmit/linkage-monitor.cfg",
     ".kokoro/presubmit/lint.cfg",
     ".kokoro/presubmit/samples.cfg",
+    ".kokoro/readme.sh",
     ".kokoro/release/bump_snapshot.cfg",
     ".kokoro/release/common.cfg",
     ".kokoro/release/common.sh",
@@ -90,7 +95,6 @@
     "CODE_OF_CONDUCT.md",
     "CONTRIBUTING.md",
     "LICENSE",
-    "README.md",
     "codecov.yaml",
     "google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminClient.java",
     "google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/SubscriptionAdminSettings.java",
diff --git a/versions.txt b/versions.txt
index 93ffb33cd..7847f3c43 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,6 +1,6 @@
 # Format:
 # module:released-version:current-version
 
-proto-google-cloud-pubsub-v1:1.90.2:1.90.2
-grpc-google-cloud-pubsub-v1:1.90.2:1.90.2
-google-cloud-pubsub:1.108.2:1.108.2
\ No newline at end of file
+proto-google-cloud-pubsub-v1:1.90.3:1.90.3
+grpc-google-cloud-pubsub-v1:1.90.3:1.90.3
+google-cloud-pubsub:1.108.3:1.108.3
\ No newline at end of file