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Posted to commits@hbase.apache.org by st...@apache.org on 2021/03/31 23:15:34 UTC

[hbase] 01/02: HBASE-25713 Make an hbase-wal module

This is an automated email from the ASF dual-hosted git repository.

stack pushed a commit to branch branch-2
in repository https://gitbox.apache.org/repos/asf/hbase.git

commit e58f1b24a6c1f3aaa511a71b2ac77280921fa210
Author: stack <st...@apache.org>
AuthorDate: Mon Mar 29 21:11:29 2021 -0700

    HBASE-25713 Make an hbase-wal module
    
    First extract an hbase-coprocessor module used by hbase-client, hbase-server.
    This is prerequisite to extracting an hbase-wal module.
    
    M hbase-common/src/main/java/org/apache/hadoop/hbase/Abortable.java
    M hbase-common/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
    M hbase-common/src/main/java/org/apache/hadoop/hbase/util/SortedList.java
     Move to hbase-common. Its a generic Interface. Need by
    
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
    M hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
     Move to hbase-coprocessor.
    
    M hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
    M hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/DoubleColumnInterpreter.java
    M hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java
    M hbase-endpoint/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
     Moved to hbase-endpoint where they are used.
    M hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
     Include region name when toString'd.
    M hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCoprocessorHost.java
     Include WAL name when toString'd.
    M hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
     Add utility used in testing here from CoprocessorHost.
---
 hbase-client/pom.xml                               |   4 +
 .../java/org/apache/hadoop/hbase/Abortable.java    |  11 +-
 .../apache/hadoop/hbase/DoNotRetryIOException.java |   6 +-
 .../org/apache/hadoop/hbase/util/SortedList.java   |   0
 .../apache/hadoop/hbase/util/TestSortedList.java   |   0
 hbase-coprocessor/pom.xml                          | 102 ++++++++++++
 .../java/org/apache/hadoop/hbase/Coprocessor.java  |   8 +-
 .../hadoop/hbase/CoprocessorEnvironment.java       |   0
 .../hadoop/hbase/coprocessor/BaseEnvironment.java  |  14 +-
 .../hadoop/hbase/coprocessor/CoprocessorHost.java  |  55 +++----
 .../hadoop/hbase/coprocessor/CoreCoprocessor.java  |   2 -
 .../hadoop/hbase/coprocessor/ObserverContext.java  |  13 +-
 .../hbase/coprocessor/ObserverContextImpl.java     |  20 +--
 .../hbase/coprocessor/ReadOnlyConfiguration.java   |   1 -
 .../coprocessor/TestReadOnlyConfiguration.java     |  15 +-
 .../coprocessor/BigDecimalColumnInterpreter.java   |   0
 .../coprocessor/DoubleColumnInterpreter.java       |   0
 .../client/coprocessor/LongColumnInterpreter.java  |   0
 .../hbase/coprocessor/ColumnInterpreter.java       |   0
 hbase-server/pom.xml                               |   4 +
 .../hbase/coprocessor/CoprocessorException.java    |  11 +-
 .../coprocessor/RegionCoprocessorEnvironment.java  |   1 -
 .../hbase/regionserver/RegionCoprocessorHost.java  |   5 +
 .../hbase/regionserver/wal/WALCoprocessorHost.java |   4 +
 .../security/access/TestAccessController.java      | 176 +++++++++++----------
 .../security/access/TestAccessController3.java     |   9 +-
 .../security/access/TestNamespaceCommands.java     |  14 +-
 .../access/TestWithDisabledAuthorization.java      |  84 +++++-----
 pom.xml                                            |  13 ++
 29 files changed, 328 insertions(+), 244 deletions(-)

diff --git a/hbase-client/pom.xml b/hbase-client/pom.xml
index 08e9174..8f61522 100644
--- a/hbase-client/pom.xml
+++ b/hbase-client/pom.xml
@@ -74,6 +74,10 @@
     </dependency>
     <dependency>
       <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-coprocessor</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-common</artifactId>
     </dependency>
     <dependency>
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/Abortable.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/Abortable.java
similarity index 82%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/Abortable.java
rename to hbase-common/src/main/java/org/apache/hadoop/hbase/Abortable.java
index 8233071..52e9c69 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/Abortable.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/Abortable.java
@@ -1,6 +1,5 @@
-/**
- *
- * Licensed to the Apache Software Foundation (ASF) under one
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
@@ -23,10 +22,8 @@ import org.apache.yetus.audience.InterfaceAudience;
 /**
  * Interface to support the aborting of a given server or client.
  * <p>
- * This is used primarily for ZooKeeper usage when we could get an unexpected
- * and fatal exception, requiring an abort.
- * <p>
- * Implemented by the Master, RegionServer, and TableServers (client).
+ * This is used primarily when we could get an unexpected and fatal exception; abort is called to
+ * exit the hosting process.
  */
 @InterfaceAudience.Private
 public interface Abortable {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
similarity index 93%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
rename to hbase-common/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
index 509844e..ae9f2ad 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/DoNotRetryIOException.java
@@ -1,5 +1,4 @@
-/**
- *
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -21,8 +20,7 @@ package org.apache.hadoop.hbase;
 import org.apache.yetus.audience.InterfaceAudience;
 
 /**
- * Subclass if exception is not meant to be retried: e.g.
- * {@link org.apache.hadoop.hbase.UnknownScannerException}
+ * Subclass if exception is not meant to be retried.
  */
 @InterfaceAudience.Public
 public class DoNotRetryIOException extends HBaseIOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/SortedList.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SortedList.java
similarity index 100%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/util/SortedList.java
rename to hbase-common/src/main/java/org/apache/hadoop/hbase/util/SortedList.java
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestSortedList.java b/hbase-common/src/test/java/org/apache/hadoop/hbase/util/TestSortedList.java
similarity index 100%
rename from hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestSortedList.java
rename to hbase-common/src/test/java/org/apache/hadoop/hbase/util/TestSortedList.java
diff --git a/hbase-coprocessor/pom.xml b/hbase-coprocessor/pom.xml
new file mode 100644
index 0000000..0bcfcef
--- /dev/null
+++ b/hbase-coprocessor/pom.xml
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<!--
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+-->
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <artifactId>hbase-build-configuration</artifactId>
+    <groupId>org.apache.hbase</groupId>
+    <version>2.5.0-SNAPSHOT</version>
+    <relativePath>../hbase-build-configuration</relativePath>
+  </parent>
+
+  <artifactId>hbase-coprocessor</artifactId>
+  <name>Apache HBase - Coprocessor</name>
+  <description>Base Coprocessor Types</description>
+
+  <build>
+    <testResources>
+      <testResource>
+        <directory>src/test/resources</directory>
+        <includes>
+          <include>log4j.properties</include>
+        </includes>
+      </testResource>
+    </testResources>
+    <plugins>
+      <plugin>
+        <!--Make it so assembly:single does nothing in here -->
+        <artifactId>maven-assembly-plugin</artifactId>
+        <configuration>
+          <skipAssembly>true</skipAssembly>
+        </configuration>
+      </plugin>
+      <!-- Make a jar and put the sources in the jar -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>net.revelc.code</groupId>
+        <artifactId>warbucks-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-annotations</artifactId>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-log4j12</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>log4j</groupId>
+      <artifactId>log4j</artifactId>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-common</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-common</artifactId>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/Coprocessor.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
similarity index 96%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
index c0d9b60..ea6ad93 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/Coprocessor.java
@@ -18,11 +18,9 @@
  */
 
 package org.apache.hadoop.hbase;
-
+import com.google.protobuf.Service;
 import java.io.IOException;
 import java.util.Collections;
-
-import com.google.protobuf.Service;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.yetus.audience.InterfaceStability;
 
@@ -97,8 +95,8 @@ public interface Coprocessor {
 
   /**
    * Coprocessor endpoints providing protobuf services should override this method.
-   * @return Iterable of {@link Service}s or empty collection. Implementations should never
-   * return null.
+   * @return Iterable of {@link Service}s or empty collection; implementations should not return
+   *    null.
    */
   default Iterable<Service> getServices() {
     return Collections.EMPTY_SET;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java
similarity index 100%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/CoprocessorEnvironment.java
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
similarity index 95%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
index 2818dcd..2e66a18 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/BaseEnvironment.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -19,6 +18,7 @@
 
 package org.apache.hadoop.hbase.coprocessor;
 
+import java.io.IOException;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Coprocessor;
 import org.apache.hadoop.hbase.CoprocessorEnvironment;
@@ -27,8 +27,6 @@ import org.apache.yetus.audience.InterfaceAudience;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.IOException;
-
 /**
  * Encapsulation of the environment of each coprocessor
  */
@@ -37,21 +35,21 @@ public class BaseEnvironment<C extends Coprocessor> implements CoprocessorEnviro
   private static final Logger LOG = LoggerFactory.getLogger(BaseEnvironment.class);
 
   /** The coprocessor */
-  public C impl;
+  protected final C impl;
   /** Chaining priority */
   protected int priority = Coprocessor.PRIORITY_USER;
   /** Current coprocessor state */
   Coprocessor.State state = Coprocessor.State.UNINSTALLED;
-  private int seq;
-  private Configuration conf;
-  private ClassLoader classLoader;
+  private final int seq;
+  private final Configuration conf;
+  private final ClassLoader classLoader;
 
   /**
    * Constructor
    * @param impl the coprocessor instance
    * @param priority chaining priority
    */
-  public BaseEnvironment(final C impl, final int priority, final int seq, final Configuration conf) {
+  public BaseEnvironment(C impl, final int priority, int seq, Configuration conf) {
     this.impl = impl;
     this.classLoader = impl.getClass().getClassLoader();
     this.priority = priority;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
similarity index 95%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
index 4425076..676a053 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
@@ -31,10 +31,6 @@ import java.util.UUID;
 import java.util.concurrent.ConcurrentSkipListSet;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Function;
-
-import org.apache.yetus.audience.InterfaceAudience;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.Abortable;
@@ -42,17 +38,18 @@ import org.apache.hadoop.hbase.Coprocessor;
 import org.apache.hadoop.hbase.CoprocessorEnvironment;
 import org.apache.hadoop.hbase.DoNotRetryIOException;
 import org.apache.hadoop.hbase.HConstants;
-import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.util.CoprocessorClassLoader;
 import org.apache.hadoop.hbase.util.SortedList;
+import org.apache.yetus.audience.InterfaceAudience;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Provides the common setup framework and runtime services for coprocessor
  * invocation from HBase services.
  * @param <C> type of specific coprocessor this host will handle
  * @param <E> type of specific coprocessor environment this host requires.
- * provides
  */
 @InterfaceAudience.Private
 public abstract class CoprocessorHost<C extends Coprocessor, E extends CoprocessorEnvironment<C>> {
@@ -100,8 +97,7 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
    * the intention is to preserve a history of all loaded coprocessors for
    * diagnosis in case of server crash (HBASE-4014).
    */
-  private static Set<String> coprocessorNames =
-      Collections.synchronizedSet(new HashSet<String>());
+  private static final Set<String> coprocessorNames = Collections.synchronizedSet(new HashSet<>());
 
   public static Set<String> getLoadedCoprocessors() {
     synchronized (coprocessorNames) {
@@ -139,8 +135,9 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
 
     // load default coprocessors from configure file
     String[] defaultCPClasses = conf.getStrings(confKey);
-    if (defaultCPClasses == null || defaultCPClasses.length == 0)
+    if (defaultCPClasses == null || defaultCPClasses.length == 0) {
       return;
+    }
 
     int currentSystemPriority = Coprocessor.PRIORITY_SYSTEM;
     for (String className : defaultCPClasses) {
@@ -454,15 +451,8 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
       // server is configured to abort.
       abortServer(env, e);
     } else {
-      // If available, pull a table name out of the environment
-      if(env instanceof RegionCoprocessorEnvironment) {
-        String tableName = ((RegionCoprocessorEnvironment)env).getRegionInfo().getTable().getNameAsString();
-        LOG.error("Removing coprocessor '" + env.toString() + "' from table '"+ tableName + "'", e);
-      } else {
-        LOG.error("Removing coprocessor '" + env.toString() + "' from " +
-                "environment",e);
-      }
-
+      // env will print the Region toString if a RegionCoprocessorEnvironment which includes table.
+      LOG.error("Removing coprocessor '" + env.toString() + "' from " + "environment", e);
       coprocEnvironments.remove(env);
       try {
         shutdown(env);
@@ -480,16 +470,13 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
    * Used to limit legacy handling to once per Coprocessor class per classloader.
    */
   private static final Set<Class<? extends Coprocessor>> legacyWarning =
-      new ConcurrentSkipListSet<>(
-          new Comparator<Class<? extends Coprocessor>>() {
-            @Override
-            public int compare(Class<? extends Coprocessor> c1, Class<? extends Coprocessor> c2) {
-              if (c1.equals(c2)) {
-                return 0;
-              }
-              return c1.getName().compareTo(c2.getName());
-            }
-          });
+      new ConcurrentSkipListSet<>(new Comparator<Class<? extends Coprocessor>>() {
+        @Override
+        public int compare(Class<? extends Coprocessor> c1, Class<? extends Coprocessor> c2) {
+          return c1.equals(c2) ? 0 : c1.getName().compareTo(c2.getName());
+        }
+      }
+     );
 
   /**
    * Implementations defined function to get an observer of type {@code O} from a coprocessor of
@@ -518,7 +505,8 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
     }
 
     ObserverOperation(ObserverGetter<C, O> observerGetter, User user, boolean bypassable) {
-      super(user != null? user: RpcServer.getRequestUser().orElse(null), bypassable);
+      // Used to get user from RpcServer if null -- removed.
+      super(user, bypassable);
       this.observerGetter = observerGetter;
     }
 
@@ -546,7 +534,7 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
     }
 
     /**
-     * In case of coprocessors which have many kinds of observers (for eg, {@link RegionCoprocessor}
+     * In case of coprocessors which have many kinds of observers (e.g. RegionCoprocessor
      * has BulkLoadObserver, RegionObserver, etc), some implementations may not need all
      * observers, in which case they will return null for that observer's getter.
      * We simply ignore such cases.
@@ -614,7 +602,7 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
 
   /**
    * @return True if we are to bypass (Can only be <code>true</code> if
-   * ObserverOperation#isBypassable().
+   *    ObserverOperation#isBypassable()).
    */
   protected <O> boolean execOperation(final ObserverOperation<O> observerOperation)
       throws IOException {
@@ -657,11 +645,12 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
    * master/regionserver stop or cluster shutdown. (Refer:
    * <a href="https://issues.apache.org/jira/browse/HBASE-16663">HBASE-16663</a>
    * @return true if bypaas coprocessor execution, false if not.
-   * @throws IOException
    */
   protected <O> boolean execShutdown(final ObserverOperation<O> observerOperation)
       throws IOException {
-    if (observerOperation == null) return false;
+    if (observerOperation == null) {
+      return false;
+    }
     boolean bypass = false;
     List<E> envs = coprocEnvironments.get();
     // Iterate the coprocessors and execute ObserverOperation's call()
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
similarity index 99%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
index 0eb5e15..948e754 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/CoreCoprocessor.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -19,7 +18,6 @@
 package org.apache.hadoop.hbase.coprocessor;
 
 import org.apache.yetus.audience.InterfaceAudience;
-
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Inherited;
 import java.lang.annotation.Retention;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
similarity index 92%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
index c756926..c66c5b3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContext.java
@@ -17,20 +17,18 @@
  */
 package org.apache.hadoop.hbase.coprocessor;
 
+import java.util.Optional;
 import org.apache.hadoop.hbase.CoprocessorEnvironment;
 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.yetus.audience.InterfaceStability;
 
-import java.util.Optional;
-
 /**
- * Carries the execution state for a given invocation of an Observer coprocessor
- * ({@link RegionObserver}, {@link MasterObserver}, or {@link WALObserver})
- * method. The same ObserverContext instance is passed sequentially to all loaded
- * coprocessors for a given Observer method trigger, with the
- * <code>CoprocessorEnvironment</code> reference set appropriately for each Coprocessor type:
+ * Carries the execution state for a given invocation of an Observer coprocessor method. The same
+ * ObserverContext instance is passed sequentially to all loaded coprocessors for a given Observer
+ * method trigger, with the <code>CoprocessorEnvironment</code> reference set appropriately for each
+ * Coprocessor type:
  * e.g. the RegionCoprocessorEnvironment is passed to RegionCoprocessors, and so on.
  * @param <E> The {@link CoprocessorEnvironment} subclass applicable to the
  *     revelant Observer interface.
@@ -69,7 +67,6 @@ public interface ObserverContext<E extends CoprocessorEnvironment> {
    */
   void bypass();
 
-
   /**
    * Returns the active user for the coprocessor call. If an explicit {@code User} instance was
    * provided to the constructor, that will be returned, otherwise if we are in the context of an
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
similarity index 74%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
index b5370db..043e9a5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.java
@@ -19,7 +19,6 @@ package org.apache.hadoop.hbase.coprocessor;
 
 import java.util.Optional;
 import org.apache.hadoop.hbase.CoprocessorEnvironment;
-import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.security.User;
 import org.apache.yetus.audience.InterfaceAudience;
 
@@ -42,6 +41,9 @@ public class ObserverContextImpl<E extends CoprocessorEnvironment> implements Ob
   }
 
   public ObserverContextImpl(User caller, boolean bypassable) {
+    // Used to do RpcServer.getRequestUser().orElse(null) if null but removed so no dependence on
+    // RPCServer.
+    assert caller != null;
     this.caller = caller;
     this.bypassable = bypassable;
   }
@@ -87,19 +89,5 @@ public class ObserverContextImpl<E extends CoprocessorEnvironment> implements Ob
     return Optional.ofNullable(caller);
   }
 
-  /**
-   * Instantiates a new ObserverContext instance if the passed reference is <code>null</code> and
-   * sets the environment in the new or existing instance. This allows deferring the instantiation
-   * of a ObserverContext until it is actually needed.
-   * @param <E> The environment type for the context
-   * @param env The coprocessor environment to set
-   * @return An instance of <code>ObserverContext</code> with the environment set
-   */
-  @Deprecated
-  // TODO: Remove this method, ObserverContext should not depend on RpcServer
-  public static <E extends CoprocessorEnvironment> ObserverContext<E> createAndPrepare(E env) {
-    ObserverContextImpl<E> ctx = new ObserverContextImpl<>(RpcServer.getRequestUser().orElse(null));
-    ctx.prepare(env);
-    return ctx;
-  }
+
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
similarity index 99%
rename from hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
rename to hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
index b805c50..485cd98 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
+++ b/hbase-coprocessor/src/main/java/org/apache/hadoop/hbase/coprocessor/ReadOnlyConfiguration.java
@@ -34,7 +34,6 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.yetus.audience.InterfaceAudience;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java b/hbase-coprocessor/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java
similarity index 86%
rename from hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java
rename to hbase-coprocessor/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java
index a91c505..3056c68 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java
+++ b/hbase-coprocessor/src/test/java/org/apache/hadoop/hbase/coprocessor/TestReadOnlyConfiguration.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -22,25 +22,20 @@ import org.apache.hadoop.hbase.HBaseClassTestRule;
 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
 import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.junit.ClassRule;
-import org.junit.Rule;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
-import org.junit.rules.TestName;
 
 @Category({ RegionServerTests.class, SmallTests.class })
 public class TestReadOnlyConfiguration {
-
   @ClassRule
   public static final HBaseClassTestRule CLASS_RULE =
-      HBaseClassTestRule.forClass(TestReadOnlyConfiguration.class);
-
-  @Rule
-  public TestName name = new TestName();
+    HBaseClassTestRule.forClass(TestReadOnlyConfiguration.class);
 
-  @Test
+  @Test (expected = UnsupportedOperationException.class)
   public void testAddDefaultResource() {
     Configuration configuration = new Configuration();
     Configuration readOnlyConf = new ReadOnlyConfiguration(configuration);
-    configuration.addDefaultResource("abc.xml");
+    readOnlyConf.addDefaultResource("abc.xml");
+    readOnlyConf.setInt("any.old.config", 1);
   }
 }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java b/hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
similarity index 100%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
rename to hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/BigDecimalColumnInterpreter.java
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/DoubleColumnInterpreter.java b/hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/DoubleColumnInterpreter.java
similarity index 100%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/DoubleColumnInterpreter.java
rename to hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/DoubleColumnInterpreter.java
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java b/hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java
similarity index 100%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java
rename to hbase-endpoint/src/main/java/org/apache/hadoop/hbase/client/coprocessor/LongColumnInterpreter.java
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java b/hbase-endpoint/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
similarity index 100%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
rename to hbase-endpoint/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
diff --git a/hbase-server/pom.xml b/hbase-server/pom.xml
index 48a9fbc..93051e0 100644
--- a/hbase-server/pom.xml
+++ b/hbase-server/pom.xml
@@ -258,6 +258,10 @@
     </dependency>
     <dependency>
       <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-coprocessor</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
       <artifactId>hbase-http</artifactId>
       <exclusions>
         <exclusion>
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
similarity index 88%
rename from hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
rename to hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
index 7b1ac43..99484a2 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
@@ -1,5 +1,4 @@
-/**
- *
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -26,8 +25,6 @@ import org.apache.yetus.audience.InterfaceAudience;
  */
 @InterfaceAudience.Public
 public class CoprocessorException extends DoNotRetryIOException {
-  private static final long serialVersionUID = 4357922136679804887L;
-
   /** Default Constructor */
   public CoprocessorException() {
     super();
@@ -35,19 +32,15 @@ public class CoprocessorException extends DoNotRetryIOException {
 
   /**
    * Constructor with a Class object and exception message.
-   * @param clazz
-   * @param s
    */
   public CoprocessorException(Class<?> clazz, String s) {
-    super( "Coprocessor [" + clazz.getName() + "]: " + s);
+    super("Coprocessor [" + clazz.getName() + "]: " + s);
   }
 
   /**
    * Constructs the exception and supplies a string as the message
-   * @param s - message
    */
   public CoprocessorException(String s) {
     super(s);
   }
-
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.java
index 84e6d25..bbd7cd6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.java
@@ -21,7 +21,6 @@ package org.apache.hadoop.hbase.coprocessor;
 
 import java.io.IOException;
 import java.util.concurrent.ConcurrentMap;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.CoprocessorEnvironment;
 import org.apache.hadoop.hbase.HBaseInterfaceAudience;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
index 6961bfd..8662c2a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
@@ -1689,4 +1689,9 @@ public class RegionCoprocessorHost
           }
         });
   }
+
+  @Override
+  public String toString() {
+    return "RegionCoprocessorHost{region=" + region + "} " + super.toString();
+  }
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCoprocessorHost.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCoprocessorHost.java
index 40d6d0f..12e9448 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCoprocessorHost.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALCoprocessorHost.java
@@ -90,6 +90,10 @@ public class WALCoprocessorHost
       super.shutdown();
       MetricsCoprocessor.removeRegistry(this.metricRegistry);
     }
+
+    @Override public String toString() {
+      return "WALEnvironment{wal=" + wal + '}';
+    }
   }
 
   private final WAL wal;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
index 94b2385..84afba1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController.java
@@ -24,7 +24,6 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
-
 import com.google.protobuf.BlockingRpcChannel;
 import com.google.protobuf.RpcCallback;
 import com.google.protobuf.RpcController;
@@ -39,7 +38,6 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.fs.FileStatus;
@@ -81,9 +79,9 @@ import org.apache.hadoop.hbase.client.SnapshotDescription;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.client.TableState;
 import org.apache.hadoop.hbase.client.security.SecurityCapability;
-
 import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
 import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
+import org.apache.hadoop.hbase.coprocessor.ObserverContext;
 import org.apache.hadoop.hbase.coprocessor.ObserverContextImpl;
 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
@@ -104,6 +102,7 @@ import org.apache.hadoop.hbase.io.hfile.CacheConfig;
 import org.apache.hadoop.hbase.io.hfile.HFile;
 import org.apache.hadoop.hbase.io.hfile.HFileContext;
 import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
+import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.master.HMaster;
 import org.apache.hadoop.hbase.master.MasterCoprocessorHost;
 import org.apache.hadoop.hbase.master.RegionState;
@@ -445,7 +444,7 @@ public class TestAccessController extends SecureTestUtil {
       public Object run() throws Exception {
         HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(name.getMethodName()));
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
-        ACCESS_CONTROLLER.preCreateTable(ObserverContextImpl.createAndPrepare(CP_ENV), htd, null);
+        ACCESS_CONTROLLER.preCreateTable(createAndPrepare(CP_ENV), htd, null);
         return null;
       }
     };
@@ -466,8 +465,7 @@ public class TestAccessController extends SecureTestUtil {
         HTableDescriptor htd = new HTableDescriptor(TEST_TABLE);
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
         htd.addFamily(new HColumnDescriptor("fam_" + User.getCurrent().getShortName()));
-        ACCESS_CONTROLLER.preModifyTable(ObserverContextImpl.createAndPrepare(CP_ENV), TEST_TABLE,
-          null, htd);
+        ACCESS_CONTROLLER.preModifyTable(createAndPrepare(CP_ENV), TEST_TABLE, null, htd);
         return null;
       }
     };
@@ -483,7 +481,7 @@ public class TestAccessController extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         ACCESS_CONTROLLER
-            .preDeleteTable(ObserverContextImpl.createAndPrepare(CP_ENV), TEST_TABLE);
+            .preDeleteTable(createAndPrepare(CP_ENV), TEST_TABLE);
         return null;
       }
     };
@@ -498,9 +496,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction truncateTable = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER
-            .preTruncateTable(ObserverContextImpl.createAndPrepare(CP_ENV),
-              TEST_TABLE);
+        ACCESS_CONTROLLER.preTruncateTable(createAndPrepare(CP_ENV), TEST_TABLE);
         return null;
       }
     };
@@ -515,8 +511,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction disableTable = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDisableTable(ObserverContextImpl.createAndPrepare(CP_ENV),
-          TEST_TABLE);
+        ACCESS_CONTROLLER.preDisableTable(createAndPrepare(CP_ENV), TEST_TABLE);
         return null;
       }
     };
@@ -524,7 +519,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction disableAclTable = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDisableTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDisableTable(createAndPrepare(CP_ENV),
           PermissionStorage.ACL_TABLE_NAME);
         return null;
       }
@@ -544,8 +539,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction enableTable = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER
-            .preEnableTable(ObserverContextImpl.createAndPrepare(CP_ENV), TEST_TABLE);
+        ACCESS_CONTROLLER.preEnableTable(createAndPrepare(CP_ENV), TEST_TABLE);
         return null;
       }
     };
@@ -620,8 +614,8 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction abortProcedureAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preAbortProcedure(ObserverContextImpl.createAndPrepare(CP_ENV), procId);
-       return null;
+        ACCESS_CONTROLLER.preAbortProcedure(createAndPrepare(CP_ENV), procId);
+        return null;
       }
     };
 
@@ -641,8 +635,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction getProceduresAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER
-        .postGetProcedures(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.postGetProcedures(createAndPrepare(CP_ENV));
        return null;
       }
     };
@@ -658,7 +651,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGetLocks(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preGetLocks(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -680,8 +673,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preMove(ObserverContextImpl.createAndPrepare(CP_ENV),
-          hri, server, server);
+        ACCESS_CONTROLLER.preMove(createAndPrepare(CP_ENV), hri, server, server);
         return null;
       }
     };
@@ -702,7 +694,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preAssign(ObserverContextImpl.createAndPrepare(CP_ENV), hri);
+        ACCESS_CONTROLLER.preAssign(createAndPrepare(CP_ENV), hri);
         return null;
       }
     };
@@ -723,7 +715,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preUnassign(ObserverContextImpl.createAndPrepare(CP_ENV), hri);
+        ACCESS_CONTROLLER.preUnassign(createAndPrepare(CP_ENV), hri);
         return null;
       }
     };
@@ -744,7 +736,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRegionOffline(ObserverContextImpl.createAndPrepare(CP_ENV), hri);
+        ACCESS_CONTROLLER.preRegionOffline(createAndPrepare(CP_ENV), hri);
         return null;
       }
     };
@@ -759,7 +751,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetSplitOrMergeEnabled(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetSplitOrMergeEnabled(createAndPrepare(CP_ENV),
           true, MasterSwitchType.MERGE);
         return null;
       }
@@ -775,7 +767,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preBalance(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preBalance(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -790,7 +782,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preBalanceSwitch(ObserverContextImpl.createAndPrepare(CP_ENV), true);
+        ACCESS_CONTROLLER.preBalanceSwitch(createAndPrepare(CP_ENV), true);
         return null;
       }
     };
@@ -805,7 +797,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preShutdown(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preShutdown(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -820,7 +812,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preStopMaster(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preStopMaster(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -843,10 +835,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSplitRegion(
-            ObserverContextImpl.createAndPrepare(CP_ENV),
-            tableName,
-            TEST_ROW);
+        ACCESS_CONTROLLER.preSplitRegion(createAndPrepare(CP_ENV), tableName, TEST_ROW);
         return null;
       }
     };
@@ -861,8 +850,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preFlush(ObserverContextImpl.createAndPrepare(RCP_ENV),
-          FlushLifeCycleTracker.DUMMY);
+        ACCESS_CONTROLLER.preFlush(createAndPrepare(RCP_ENV), FlushLifeCycleTracker.DUMMY);
         return null;
       }
     };
@@ -877,7 +865,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCompact(ObserverContextImpl.createAndPrepare(RCP_ENV), null, null,
+        ACCESS_CONTROLLER.preCompact(createAndPrepare(RCP_ENV), null, null,
           ScanType.COMPACT_RETAIN_DELETES, null, null);
         return null;
       }
@@ -919,7 +907,7 @@ public class TestAccessController extends SecureTestUtil {
 
     // action for scanning
     AccessTestAction scanAction = new AccessTestAction() {
-      @Override
+      @SuppressWarnings("checkstyle:EmptyStatement") @Override
       public Object run() throws Exception {
         Scan s = new Scan();
         s.addFamily(TEST_FAMILY);
@@ -928,7 +916,7 @@ public class TestAccessController extends SecureTestUtil {
           ResultScanner scanner = table.getScanner(s);
           try {
             for (Result r = scanner.next(); r != null; r = scanner.next()) {
-              // do nothing
+              ; // do nothing
             }
           } finally {
             scanner.close();
@@ -1261,7 +1249,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction preGrantAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGrant(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGrant(createAndPrepare(CP_ENV),
           new UserPermission(USER_RO.getShortName(), Permission.newBuilder(TEST_TABLE)
               .withFamily(TEST_FAMILY).withActions(Action.READ).build()),
           false);
@@ -1272,7 +1260,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction preRevokeAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRevoke(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRevoke(createAndPrepare(CP_ENV),
           new UserPermission(USER_RO.getShortName(), Permission.newBuilder(TEST_TABLE)
               .withFamily(TEST_FAMILY).withActions(Action.READ).build()));
         return null;
@@ -1593,11 +1581,12 @@ public class TestAccessController extends SecureTestUtil {
   }
 
   private boolean hasFoundUserPermission(List<UserPermission> userPermissions,
-                                         List<UserPermission> perms) {
+      List<UserPermission> perms) {
     return perms.containsAll(userPermissions);
   }
 
-  private boolean hasFoundUserPermission(UserPermission userPermission, List<UserPermission> perms) {
+  private boolean hasFoundUserPermission(UserPermission userPermission,
+      List<UserPermission> perms) {
     return perms.contains(userPermission);
   }
 
@@ -1991,7 +1980,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preStopRegionServer(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preStopRegionServer(createAndPrepare(RSCP_ENV));
         return null;
       }
     };
@@ -2006,7 +1995,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRollWALWriterRequest(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preRollWALWriterRequest(createAndPrepare(RSCP_ENV));
         return null;
       }
     };
@@ -2021,7 +2010,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preOpen(ObserverContextImpl.createAndPrepare(RCP_ENV));
+        ACCESS_CONTROLLER.preOpen(createAndPrepare(RCP_ENV));
         return null;
       }
     };
@@ -2036,7 +2025,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preClose(ObserverContextImpl.createAndPrepare(RCP_ENV), false);
+        ACCESS_CONTROLLER.preClose(createAndPrepare(RCP_ENV), false);
         return null;
       }
     };
@@ -2055,7 +2044,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction snapshotAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSnapshot(createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -2064,7 +2053,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction deleteAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDeleteSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteSnapshot(createAndPrepare(CP_ENV),
           snapshot);
         return null;
       }
@@ -2073,7 +2062,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction restoreAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRestoreSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRestoreSnapshot(createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -2082,7 +2071,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction cloneAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCloneSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preCloneSnapshot(createAndPrepare(CP_ENV),
           snapshot, null);
         return null;
       }
@@ -2115,7 +2104,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction snapshotAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSnapshot(createAndPrepare(CP_ENV),
             snapshot, htd);
         return null;
       }
@@ -2127,7 +2116,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction deleteAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDeleteSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteSnapshot(createAndPrepare(CP_ENV),
           snapshot);
         return null;
       }
@@ -2139,7 +2128,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction restoreAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRestoreSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRestoreSnapshot(createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -2151,7 +2140,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction cloneAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCloneSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preCloneSnapshot(createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -2296,7 +2285,8 @@ public class TestAccessController extends SecureTestUtil {
     createTestTable(tableName);
 
     // Grant TABLE ADMIN privs
-    grantOnTable(TEST_UTIL, TABLE_ADMIN.getShortName(), tableName, null, null, Permission.Action.ADMIN);
+    grantOnTable(TEST_UTIL, TABLE_ADMIN.getShortName(), tableName, null, null,
+      Permission.Action.ADMIN);
 
     AccessTestAction deleteTableAction = new AccessTestAction() {
       @Override
@@ -2524,8 +2514,8 @@ public class TestAccessController extends SecureTestUtil {
 
     // Revoke table READ & WRITE permission to testGrantRevoke.
     try {
-      revokeFromTableUsingAccessControlClient(TEST_UTIL, systemUserConnection, userName, TEST_TABLE, null, null,
-              Permission.Action.READ, Permission.Action.WRITE);
+      revokeFromTableUsingAccessControlClient(TEST_UTIL, systemUserConnection, userName, TEST_TABLE,
+        null, null, Permission.Action.READ, Permission.Action.WRITE);
     } catch (Throwable e) {
       LOG.error("error during call of AccessControlClient.revoke ", e);
     }
@@ -2710,7 +2700,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setUserQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetUserQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetUserQuota(createAndPrepare(CP_ENV),
           null, null);
         return null;
       }
@@ -2719,7 +2709,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setUserTableQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetUserQuota(ObserverContextImpl.createAndPrepare(CP_ENV), null,
+        ACCESS_CONTROLLER.preSetUserQuota(createAndPrepare(CP_ENV), null,
           TEST_TABLE, null);
         return null;
       }
@@ -2728,7 +2718,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setUserNamespaceQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetUserQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetUserQuota(createAndPrepare(CP_ENV),
           null, (String)null, null);
         return null;
       }
@@ -2737,7 +2727,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setTableQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetTableQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetTableQuota(createAndPrepare(CP_ENV),
           TEST_TABLE, null);
         return null;
       }
@@ -2746,7 +2736,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setNamespaceQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetNamespaceQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetNamespaceQuota(createAndPrepare(CP_ENV),
           null, null);
         return null;
       }
@@ -2755,7 +2745,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction setRegionServerQuotaAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetRegionServerQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetRegionServerQuota(createAndPrepare(CP_ENV),
           null, null);
         return null;
       }
@@ -2807,7 +2797,8 @@ public class TestAccessController extends SecureTestUtil {
   /**
    * List all user permissions match the given regular expression for namespace
    * and verify each of them.
-   * @param namespaceRegexWithoutPrefix the regualar expression for namespace, without NAMESPACE_PREFIX
+   * @param namespaceRegexWithoutPrefix the regualar expression for namespace, without
+   *    NAMESPACE_PREFIX
    * @param expectedAmount the expected amount of user permissions returned
    * @param expectedNamespace the expected namespace of each user permission returned
    * @throws HBaseException in the case of any HBase exception when accessing hbase:acl table
@@ -2944,14 +2935,14 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction prepareBulkLoadAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.prePrepareBulkLoad(ObserverContextImpl.createAndPrepare(RCP_ENV));
+        ACCESS_CONTROLLER.prePrepareBulkLoad(createAndPrepare(RCP_ENV));
         return null;
       }
     };
     AccessTestAction cleanupBulkLoadAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCleanupBulkLoad(ObserverContextImpl.createAndPrepare(RCP_ENV));
+        ACCESS_CONTROLLER.preCleanupBulkLoad(createAndPrepare(RCP_ENV));
         return null;
       }
     };
@@ -2964,8 +2955,8 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction replicateLogEntriesAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preReplicateLogEntries(ObserverContextImpl.createAndPrepare(RSCP_ENV));
-        ACCESS_CONTROLLER.postReplicateLogEntries(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preReplicateLogEntries(createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.postReplicateLogEntries(createAndPrepare(RSCP_ENV));
         return null;
       }
     };
@@ -2980,7 +2971,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preAddReplicationPeer(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preAddReplicationPeer(createAndPrepare(CP_ENV),
           "test", null);
         return null;
       }
@@ -2995,7 +2986,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRemoveReplicationPeer(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRemoveReplicationPeer(createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -3010,7 +3001,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preEnableReplicationPeer(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preEnableReplicationPeer(createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -3025,7 +3016,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDisableReplicationPeer(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDisableReplicationPeer(createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -3041,7 +3032,7 @@ public class TestAccessController extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         ACCESS_CONTROLLER.preGetReplicationPeerConfig(
-          ObserverContextImpl.createAndPrepare(CP_ENV), "test");
+          createAndPrepare(CP_ENV), "test");
         return null;
       }
     };
@@ -3056,7 +3047,7 @@ public class TestAccessController extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         ACCESS_CONTROLLER.preUpdateReplicationPeerConfig(
-          ObserverContextImpl.createAndPrepare(CP_ENV), "test", new ReplicationPeerConfig());
+          createAndPrepare(CP_ENV), "test", new ReplicationPeerConfig());
         return null;
       }
     };
@@ -3070,7 +3061,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preListReplicationPeers(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preListReplicationPeers(createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -3101,7 +3092,7 @@ public class TestAccessController extends SecureTestUtil {
 
     AccessTestAction namespaceLockAction = new AccessTestAction() {
       @Override public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRequestLock(ObserverContextImpl.createAndPrepare(CP_ENV), namespace,
+        ACCESS_CONTROLLER.preRequestLock(createAndPrepare(CP_ENV), namespace,
             null, null, null);
         return null;
       }
@@ -3115,7 +3106,7 @@ public class TestAccessController extends SecureTestUtil {
 
     AccessTestAction tableLockAction = new AccessTestAction() {
       @Override public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRequestLock(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRequestLock(createAndPrepare(CP_ENV),
             null, tableName, null, null);
         return null;
       }
@@ -3137,7 +3128,7 @@ public class TestAccessController extends SecureTestUtil {
 
     AccessTestAction regionsLockAction = new AccessTestAction() {
       @Override public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRequestLock(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRequestLock(createAndPrepare(CP_ENV),
             null, null, regionInfos, null);
         return null;
       }
@@ -3151,7 +3142,7 @@ public class TestAccessController extends SecureTestUtil {
     LockProcedure proc = new LockProcedure(conf, tableName, LockType.EXCLUSIVE, "test", null);
     AccessTestAction regionLockHeartbeatAction = new AccessTestAction() {
       @Override public Object run() throws Exception {
-        ACCESS_CONTROLLER.preLockHeartbeat(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preLockHeartbeat(createAndPrepare(CP_ENV),
             proc.getTableName(), proc.getDescription());
         return null;
       }
@@ -3201,7 +3192,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGetClusterMetrics(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preGetClusterMetrics(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -3215,7 +3206,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preExecuteProcedures(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preExecuteProcedures(createAndPrepare(RSCP_ENV));
         return null;
       }
     };
@@ -3496,7 +3487,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSwitchRpcThrottle(ObserverContextImpl.createAndPrepare(CP_ENV), true);
+        ACCESS_CONTROLLER.preSwitchRpcThrottle(createAndPrepare(CP_ENV), true);
         return null;
       }
     };
@@ -3509,7 +3500,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preIsRpcThrottleEnabled(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preIsRpcThrottleEnabled(createAndPrepare(CP_ENV));
         return null;
       }
     };
@@ -3522,8 +3513,7 @@ public class TestAccessController extends SecureTestUtil {
     AccessTestAction action = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSwitchExceedThrottleQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
-          true);
+        ACCESS_CONTROLLER.preSwitchExceedThrottleQuota(createAndPrepare(CP_ENV), true);
         return null;
       }
     };
@@ -3743,4 +3733,18 @@ public class TestAccessController extends SecureTestUtil {
       }
     }
   }
+
+  /**
+   * Instantiates a new ObserverContext instance if the passed reference is <code>null</code> and
+   * sets the environment in the new or existing instance. This allows deferring the instantiation
+   * of a ObserverContext until it is actually needed.
+   * @param <E> The environment type for the context
+   * @param env The coprocessor environment to set
+   * @return An instance of <code>ObserverContext</code> with the environment set
+   */
+  static <E extends CoprocessorEnvironment> ObserverContext<E> createAndPrepare(E env) {
+    ObserverContextImpl<E> ctx = new ObserverContextImpl<>(RpcServer.getRequestUser().orElse(null));
+    ctx.prepare(env);
+    return ctx;
+  }
 }
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController3.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController3.java
index 2920054..49999f2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController3.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController3.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
@@ -32,7 +32,6 @@ import org.apache.hadoop.hbase.TableNotFoundException;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
 import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
-import org.apache.hadoop.hbase.coprocessor.ObserverContextImpl;
 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
 import org.apache.hadoop.hbase.coprocessor.RegionServerCoprocessorEnvironment;
 import org.apache.hadoop.hbase.master.MasterCoprocessorHost;
@@ -44,7 +43,6 @@ import org.apache.hadoop.hbase.security.User;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
 import org.apache.hadoop.hbase.testclassification.SecurityTests;
 import org.apache.hadoop.hbase.util.Bytes;
-import org.apache.hadoop.hbase.util.JVMClusterUtil;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.ClassRule;
@@ -111,7 +109,7 @@ public class TestAccessController3 extends SecureTestUtil {
   // https://hbase.apache.org/book/appendix_acl_matrix.html
   // creating all Scope x Permission combinations
 
-  private static byte[] TEST_FAMILY = Bytes.toBytes("f1");
+  private static final byte[] TEST_FAMILY = Bytes.toBytes("f1");
 
   private static MasterCoprocessorEnvironment CP_ENV;
   private static AccessController ACCESS_CONTROLLER;
@@ -281,7 +279,8 @@ public class TestAccessController3 extends SecureTestUtil {
       public Object run() throws Exception {
         HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(name.getMethodName()));
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
-        ACCESS_CONTROLLER.preCreateTable(ObserverContextImpl.createAndPrepare(CP_ENV), htd, null);
+        ACCESS_CONTROLLER.preCreateTable(TestAccessController.
+          createAndPrepare(CP_ENV), htd, null);
         return null;
       }
     };
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestNamespaceCommands.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestNamespaceCommands.java
index dbb5bfd..d4c19e7 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestNamespaceCommands.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestNamespaceCommands.java
@@ -248,7 +248,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction modifyNamespace = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preModifyNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preModifyNamespace(TestAccessController.createAndPrepare(CP_ENV),
           NamespaceDescriptor.create(TEST_NAMESPACE).addConfiguration("abc", "156").build());
         return null;
       }
@@ -266,7 +266,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction createNamespace = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCreateNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preCreateNamespace(TestAccessController.createAndPrepare(CP_ENV),
           NamespaceDescriptor.create(TEST_NAMESPACE2).build());
         return null;
       }
@@ -275,7 +275,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction deleteNamespace = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDeleteNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteNamespace(TestAccessController.createAndPrepare(CP_ENV),
           TEST_NAMESPACE2);
         return null;
       }
@@ -300,7 +300,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction getNamespaceAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGetNamespaceDescriptor(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGetNamespaceDescriptor(TestAccessController.createAndPrepare(CP_ENV),
           TEST_NAMESPACE);
         return null;
       }
@@ -422,7 +422,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction preGrantAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGrant(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGrant(TestAccessController.createAndPrepare(CP_ENV),
           new UserPermission(testUser,
               Permission.newBuilder(TEST_NAMESPACE).withActions(Action.WRITE).build()),
           false);
@@ -432,7 +432,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
     AccessTestAction preRevokeAction = new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRevoke(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRevoke(TestAccessController.createAndPrepare(CP_ENV),
           new UserPermission(testUser,
               Permission.newBuilder(TEST_NAMESPACE).withActions(Action.WRITE).build()));
         return null;
@@ -518,7 +518,7 @@ public class TestNamespaceCommands extends SecureTestUtil {
       public Object run() throws Exception {
         HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(TEST_TABLE));
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
-        ACCESS_CONTROLLER.preCreateTable(ObserverContextImpl.createAndPrepare(CP_ENV), htd, null);
+        ACCESS_CONTROLLER.preCreateTable(TestAccessController.createAndPrepare(CP_ENV), htd, null);
         return null;
       }
     };
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestWithDisabledAuthorization.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestWithDisabledAuthorization.java
index 2650702..b312ced 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestWithDisabledAuthorization.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestWithDisabledAuthorization.java
@@ -472,7 +472,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       public Object run() throws Exception {
         HTableDescriptor htd = new HTableDescriptor(testTable.getTableName());
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
-        ACCESS_CONTROLLER.preCreateTable(ObserverContextImpl.createAndPrepare(CP_ENV), htd,
+        ACCESS_CONTROLLER.preCreateTable(TestAccessController.createAndPrepare(CP_ENV), htd,
           null);
         return null;
       }
@@ -485,7 +485,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
         HTableDescriptor htd = new HTableDescriptor(testTable.getTableName());
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY));
         htd.addFamily(new HColumnDescriptor(TEST_FAMILY2));
-        ACCESS_CONTROLLER.preModifyTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preModifyTable(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName(), htd);
         return null;
       }
@@ -495,7 +495,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDeleteTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteTable(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName());
         return null;
       }
@@ -505,7 +505,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preTruncateTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preTruncateTable(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName());
         return null;
       }
@@ -515,7 +515,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preEnableTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preEnableTable(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName());
         return null;
       }
@@ -525,7 +525,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDisableTable(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDisableTable(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName());
         return null;
       }
@@ -538,7 +538,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
         HRegionInfo region = new HRegionInfo(testTable.getTableName());
         ServerName srcServer = ServerName.valueOf("1.1.1.1", 1, 0);
         ServerName destServer = ServerName.valueOf("2.2.2.2", 2, 0);
-        ACCESS_CONTROLLER.preMove(ObserverContextImpl.createAndPrepare(CP_ENV), region,
+        ACCESS_CONTROLLER.preMove(TestAccessController.createAndPrepare(CP_ENV), region,
           srcServer, destServer);
         return null;
       }
@@ -549,7 +549,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         HRegionInfo region = new HRegionInfo(testTable.getTableName());
-        ACCESS_CONTROLLER.preAssign(ObserverContextImpl.createAndPrepare(CP_ENV), region);
+        ACCESS_CONTROLLER.preAssign(TestAccessController.createAndPrepare(CP_ENV), region);
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -559,7 +559,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         HRegionInfo region = new HRegionInfo(testTable.getTableName());
-        ACCESS_CONTROLLER.preUnassign(ObserverContextImpl.createAndPrepare(CP_ENV), region);
+        ACCESS_CONTROLLER.preUnassign(TestAccessController.createAndPrepare(CP_ENV), region);
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -568,7 +568,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preBalance(ObserverContextImpl.createAndPrepare(CP_ENV));
+        ACCESS_CONTROLLER.preBalance(TestAccessController.createAndPrepare(CP_ENV));
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -577,7 +577,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preBalanceSwitch(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preBalanceSwitch(TestAccessController.createAndPrepare(CP_ENV),
           true);
         return null;
       }
@@ -589,7 +589,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       public Object run() throws Exception {
         SnapshotDescription snapshot = new SnapshotDescription("foo");
         HTableDescriptor htd = new HTableDescriptor(testTable.getTableName());
-        ACCESS_CONTROLLER.preSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSnapshot(TestAccessController.createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -600,7 +600,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         SnapshotDescription snapshot = new SnapshotDescription("foo");
-        ACCESS_CONTROLLER.preListSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preListSnapshot(TestAccessController.createAndPrepare(CP_ENV),
           snapshot);
         return null;
       }
@@ -612,7 +612,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       public Object run() throws Exception {
         SnapshotDescription snapshot = new SnapshotDescription("foo");
         HTableDescriptor htd = new HTableDescriptor(testTable.getTableName());
-        ACCESS_CONTROLLER.preCloneSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preCloneSnapshot(TestAccessController.createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -624,7 +624,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       public Object run() throws Exception {
         SnapshotDescription snapshot = new SnapshotDescription("foo");
         HTableDescriptor htd = new HTableDescriptor(testTable.getTableName());
-        ACCESS_CONTROLLER.preRestoreSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preRestoreSnapshot(TestAccessController.createAndPrepare(CP_ENV),
           snapshot, htd);
         return null;
       }
@@ -635,7 +635,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         SnapshotDescription snapshot = new SnapshotDescription("foo");
-        ACCESS_CONTROLLER.preDeleteSnapshot(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteSnapshot(TestAccessController.createAndPrepare(CP_ENV),
           snapshot);
         return null;
       }
@@ -648,7 +648,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
         List<TableName> tableNamesList = Lists.newArrayList();
         tableNamesList.add(testTable.getTableName());
         List<TableDescriptor> descriptors = Lists.newArrayList();
-        ACCESS_CONTROLLER.preGetTableDescriptors(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGetTableDescriptors(TestAccessController.createAndPrepare(CP_ENV),
           tableNamesList, descriptors, ".+");
         return null;
       }
@@ -659,7 +659,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         List<TableDescriptor> descriptors = Lists.newArrayList();
-        ACCESS_CONTROLLER.preGetTableNames(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGetTableNames(TestAccessController.createAndPrepare(CP_ENV),
           descriptors, ".+");
         return null;
       }
@@ -670,7 +670,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         NamespaceDescriptor ns = NamespaceDescriptor.create("test").build();
-        ACCESS_CONTROLLER.preCreateNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preCreateNamespace(TestAccessController.createAndPrepare(CP_ENV),
           ns);
         return null;
       }
@@ -680,7 +680,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDeleteNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preDeleteNamespace(TestAccessController.createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -691,7 +691,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         NamespaceDescriptor ns = NamespaceDescriptor.create("test").build();
-        ACCESS_CONTROLLER.preModifyNamespace(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preModifyNamespace(TestAccessController.createAndPrepare(CP_ENV),
           ns);
         return null;
       }
@@ -701,7 +701,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preGetNamespaceDescriptor(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preGetNamespaceDescriptor(TestAccessController.createAndPrepare(CP_ENV),
           "test");
         return null;
       }
@@ -712,7 +712,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         List<NamespaceDescriptor> descriptors = Lists.newArrayList();
-        ACCESS_CONTROLLER.preListNamespaceDescriptors(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preListNamespaceDescriptors(TestAccessController.createAndPrepare(CP_ENV),
           descriptors);
         return null;
       }
@@ -723,7 +723,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         ACCESS_CONTROLLER.preSplitRegion(
-          ObserverContextImpl.createAndPrepare(CP_ENV),
+          TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName(),
           Bytes.toBytes("ss"));
         return null;
@@ -734,7 +734,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetUserQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetUserQuota(TestAccessController.createAndPrepare(CP_ENV),
           "testuser", null);
         return null;
       }
@@ -744,7 +744,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetTableQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetTableQuota(TestAccessController.createAndPrepare(CP_ENV),
           testTable.getTableName(), null);
         return null;
       }
@@ -754,7 +754,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preSetNamespaceQuota(ObserverContextImpl.createAndPrepare(CP_ENV),
+        ACCESS_CONTROLLER.preSetNamespaceQuota(TestAccessController.createAndPrepare(CP_ENV),
           "test", null);
         return null;
       }
@@ -769,7 +769,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preStopRegionServer(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preStopRegionServer(TestAccessController.createAndPrepare(RSCP_ENV));
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -778,7 +778,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preRollWALWriterRequest(ObserverContextImpl.createAndPrepare(RSCP_ENV));
+        ACCESS_CONTROLLER.preRollWALWriterRequest(TestAccessController.createAndPrepare(RSCP_ENV));
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -793,7 +793,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preOpen(ObserverContextImpl.createAndPrepare(RCP_ENV));
+        ACCESS_CONTROLLER.preOpen(TestAccessController.createAndPrepare(RCP_ENV));
         return null;
       }
     }, SUPERUSER, USER_ADMIN, USER_RW, USER_RO, USER_OWNER, USER_CREATE, USER_QUAL, USER_NONE);
@@ -802,7 +802,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preFlush(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preFlush(TestAccessController.createAndPrepare(RCP_ENV),
           FlushLifeCycleTracker.DUMMY);
         return null;
       }
@@ -813,7 +813,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         List<Cell> cells = Lists.newArrayList();
-        ACCESS_CONTROLLER.preGetOp(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preGetOp(TestAccessController.createAndPrepare(RCP_ENV),
           new Get(TEST_ROW), cells);
         return null;
       }
@@ -823,7 +823,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preExists(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preExists(TestAccessController.createAndPrepare(RCP_ENV),
           new Get(TEST_ROW), true);
         return null;
       }
@@ -833,7 +833,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.prePut(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.prePut(TestAccessController.createAndPrepare(RCP_ENV),
           new Put(TEST_ROW), new WALEdit(), Durability.USE_DEFAULT);
         return null;
       }
@@ -843,7 +843,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preDelete(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preDelete(TestAccessController.createAndPrepare(RCP_ENV),
           new Delete(TEST_ROW), new WALEdit(), Durability.USE_DEFAULT);
         return null;
       }
@@ -853,7 +853,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preBatchMutate(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preBatchMutate(TestAccessController.createAndPrepare(RCP_ENV),
           new MiniBatchOperationInProgress<>(null, null, null, 0, 0, 0));
         return null;
       }
@@ -863,7 +863,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCheckAndPut(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preCheckAndPut(TestAccessController.createAndPrepare(RCP_ENV),
           TEST_ROW, TEST_FAMILY, TEST_Q1, CompareOperator.EQUAL,
           new BinaryComparator("foo".getBytes()), new Put(TEST_ROW), true);
         return null;
@@ -874,7 +874,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preCheckAndDelete(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preCheckAndDelete(TestAccessController.createAndPrepare(RCP_ENV),
           TEST_ROW, TEST_FAMILY, TEST_Q1, CompareOperator.EQUAL,
           new BinaryComparator("foo".getBytes()), new Delete(TEST_ROW), true);
         return null;
@@ -885,7 +885,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preAppend(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preAppend(TestAccessController.createAndPrepare(RCP_ENV),
           new Append(TEST_ROW));
         return null;
       }
@@ -895,7 +895,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preIncrement(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preIncrement(TestAccessController.createAndPrepare(RCP_ENV),
           new Increment(TEST_ROW));
         return null;
       }
@@ -905,7 +905,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
     verifyAllowed(new AccessTestAction() {
       @Override
       public Object run() throws Exception {
-        ACCESS_CONTROLLER.preScannerOpen(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preScannerOpen(TestAccessController.createAndPrepare(RCP_ENV),
           new Scan());
         return null;
       }
@@ -916,7 +916,7 @@ public class TestWithDisabledAuthorization extends SecureTestUtil {
       @Override
       public Object run() throws Exception {
         List<Pair<byte[], String>> paths = Lists.newArrayList();
-        ACCESS_CONTROLLER.preBulkLoadHFile(ObserverContextImpl.createAndPrepare(RCP_ENV),
+        ACCESS_CONTROLLER.preBulkLoadHFile(TestAccessController.createAndPrepare(RCP_ENV),
           paths);
         return null;
       }
diff --git a/pom.xml b/pom.xml
index 92cb517..465cdb2 100755
--- a/pom.xml
+++ b/pom.xml
@@ -92,6 +92,7 @@
     <module>hbase-hbtop</module>
     <module>hbase-asyncfs</module>
     <module>hbase-logging</module>
+    <module>hbase-coprocessor</module>
   </modules>
   <scm>
     <connection>scm:git:git://gitbox.apache.org/repos/asf/hbase.git</connection>
@@ -1629,6 +1630,18 @@
       </dependency>
       <dependency>
         <groupId>org.apache.hbase</groupId>
+        <artifactId>hbase-coprocessor</artifactId>
+        <version>${project.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.hbase</groupId>
+        <artifactId>hbase-coprocessor</artifactId>
+        <version>${project.version}</version>
+        <type>test-jar</type>
+        <scope>test</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.apache.hbase</groupId>
         <artifactId>hbase-protocol-shaded</artifactId>
         <version>${project.version}</version>
       </dependency>