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in repository https://gitbox.apache.org/repos/asf/phoenix.git


The following commit(s) were added to refs/heads/master by this push:
     new a3a19af  PHOENIX-6280 Support HBase 2.4
a3a19af is described below

commit a3a19afcdc06f4834051f33b3a2adc4577b454c0
Author: Istvan Toth <st...@apache.org>
AuthorDate: Thu Dec 24 11:25:31 2020 +0100

    PHOENIX-6280 Support HBase 2.4
---
 Jenkinsfile                                        |   2 +-
 phoenix-core/pom.xml                               |  19 ++
 .../it/resources/compatible_client_versions.json   |   3 +-
 .../hadoop/hbase/ipc/PhoenixRpcScheduler.java      |   2 +-
 .../IndexHalfStoreFileReaderGenerator.java         |   3 +-
 .../org/apache/phoenix/execute/DelegateHTable.java |   5 -
 .../hbase/index/parallel/ThreadPoolManager.java    |   5 +-
 .../apache/phoenix/schema/MetaDataSplitPolicy.java |  47 +++--
 .../schema/SplitOnLeadingVarCharColumnsPolicy.java |   4 +-
 .../phoenix/transaction/OmidTransactionTable.java  |   5 -
 .../phoenix/compat/hbase/CompatDelegateHTable.java |   8 +
 .../compat/hbase/CompatOmidTransactionTable.java   |   8 +
 .../compat/hbase/CompatPhoenixRpcScheduler.java    |   2 +-
 ...onTable.java => CompatSteppingSplitPolicy.java} |  10 +-
 .../apache/phoenix/compat/hbase/CompatUtil.java    |   9 +-
 .../phoenix/compat/hbase/CompatDelegateHTable.java |   7 +
 .../compat/hbase/CompatOmidTransactionTable.java   |   8 +
 .../compat/hbase/CompatPhoenixRpcScheduler.java    |   2 +-
 .../compat/hbase/CompatSteppingSplitPolicy.java    |  10 +-
 .../apache/phoenix/compat/hbase/CompatUtil.java    |   8 +
 .../phoenix/compat/hbase/CompatDelegateHTable.java |   6 +
 .../compat/hbase/CompatOmidTransactionTable.java   |   6 +
 .../compat/hbase/CompatPhoenixRpcScheduler.java    |   2 +-
 .../compat/hbase/CompatSteppingSplitPolicy.java    |  10 +-
 .../apache/phoenix/compat/hbase/CompatUtil.java    |   8 +
 phoenix-hbase-compat-2.4.0/pom.xml                 | 102 +++++++++++
 .../phoenix/compat/hbase/CompatDelegateHTable.java |   7 +
 .../compat/hbase/CompatOmidTransactionTable.java   |   7 +
 .../phoenix/compat/hbase/CompatPermissionUtil.java |  59 ++++++
 .../compat/hbase/CompatPhoenixRpcScheduler.java    |   2 +-
 .../compat/hbase/CompatSteppingSplitPolicy.java    |   5 +-
 .../compat/hbase/CompatStoreFileReader.java        |  48 +++++
 .../apache/phoenix/compat/hbase/CompatUtil.java    |   8 +
 .../compat/hbase/HbaseCompatCapabilities.java      |  26 +--
 .../apache/phoenix/compat/hbase/OffsetCell.java    | 136 ++++++++++++++
 .../CompatBaseScannerRegionObserver.java           | 197 +++++++++++++++++++++
 .../coprocessor/CompatIndexRegionObserver.java     |  25 +--
 .../phoenix/compat/hbase/test/DelegateCell.java    | 139 +++++++++++++++
 phoenix-server/pom.xml                             |  17 ++
 pom.xml                                            |  25 +++
 40 files changed, 931 insertions(+), 71 deletions(-)

diff --git a/Jenkinsfile b/Jenkinsfile
index 5bb1ebd..1b4e1f5 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -39,7 +39,7 @@ pipeline {
                 axes {
                     axis {
                         name 'HBASE_PROFILE'
-                        values '2.1', '2.2', '2.3'
+                        values '2.1', '2.2', '2.3', '2.4'
                     }
                 }
 
diff --git a/phoenix-core/pom.xml b/phoenix-core/pom.xml
index 9f8efca..fd25797 100644
--- a/phoenix-core/pom.xml
+++ b/phoenix-core/pom.xml
@@ -70,6 +70,9 @@
                     || ("${hbase.compat.version}".equals("2.3.0")
                       &amp;&amp; hbaseMinor == 3
                       &amp;&amp; hbasePatch &gt;=0)
+                    || ("${hbase.compat.version}".equals("2.4.0")
+                      &amp;&amp; hbaseMinor == 4
+                      &amp;&amp; hbasePatch &gt;=0)
                   )
                 </condition>
               </evaluateBeanshell>
@@ -590,5 +593,21 @@
       </dependency>
     </dependencies>
   </profile>
+  <profile>
+    <id>phoenix-hbase-compat-2.4.0</id>
+    <!-- keep dependency plugin happy -->
+    <activation>
+      <property>
+        <name>hbase.profile</name>
+        <value>2.4</value>
+      </property>
+    </activation>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.zookeeper</groupId>
+        <artifactId>zookeeper-jute</artifactId>
+      </dependency>
+    </dependencies>
+  </profile>
 </profiles>
 </project>
diff --git a/phoenix-core/src/it/resources/compatible_client_versions.json 
b/phoenix-core/src/it/resources/compatible_client_versions.json
index 692cb38..aa94642 100644
--- a/phoenix-core/src/it/resources/compatible_client_versions.json
+++ b/phoenix-core/src/it/resources/compatible_client_versions.json
@@ -22,5 +22,6 @@
     "1.5": ["4.15.0"],
     "2.1": ["5.1.0"],
     "2.2": ["5.1.0"],
-    "2.3": ["5.1.0"]
+    "2.3": ["5.1.0"],
+    "2.4": ["5.1.0"]
 }
diff --git 
a/phoenix-core/src/main/java/org/apache/hadoop/hbase/ipc/PhoenixRpcScheduler.java
 
b/phoenix-core/src/main/java/org/apache/hadoop/hbase/ipc/PhoenixRpcScheduler.java
index 4508a2d..9c56316 100644
--- 
a/phoenix-core/src/main/java/org/apache/hadoop/hbase/ipc/PhoenixRpcScheduler.java
+++ 
b/phoenix-core/src/main/java/org/apache/hadoop/hbase/ipc/PhoenixRpcScheduler.java
@@ -28,7 +28,7 @@ import org.apache.phoenix.query.QueryServicesOptions;
 import 
org.apache.phoenix.thirdparty.com.google.common.annotations.VisibleForTesting;
 
 /**
- * {@link RpcScheduler} that first checks to see if this is an index or 
metedata update before passing off the
+ * {@link RpcScheduler} that first checks to see if this is an index or 
metadata update before passing off the
  * call to the delegate {@link RpcScheduler}.
  */
 public class PhoenixRpcScheduler extends CompatPhoenixRpcScheduler {
diff --git 
a/phoenix-core/src/main/java/org/apache/hadoop/hbase/regionserver/IndexHalfStoreFileReaderGenerator.java
 
b/phoenix-core/src/main/java/org/apache/hadoop/hbase/regionserver/IndexHalfStoreFileReaderGenerator.java
index 5e59136..427bf3b 100644
--- 
a/phoenix-core/src/main/java/org/apache/hadoop/hbase/regionserver/IndexHalfStoreFileReaderGenerator.java
+++ 
b/phoenix-core/src/main/java/org/apache/hadoop/hbase/regionserver/IndexHalfStoreFileReaderGenerator.java
@@ -53,6 +53,7 @@ import org.apache.hadoop.hbase.io.hfile.CacheConfig;
 import 
org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;
 import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.phoenix.compat.hbase.CompatUtil;
 import org.apache.phoenix.index.IndexMaintainer;
 import org.apache.phoenix.jdbc.PhoenixConnection;
 import org.apache.phoenix.query.QueryConstants;
@@ -97,7 +98,7 @@ public class IndexHalfStoreFileReaderGenerator implements 
RegionObserver, Region
             byte[] regionStartKeyInHFile = null;
             try (Connection hbaseConn =
                     
ConnectionFactory.createConnection(ctx.getEnvironment().getConfiguration())) {
-                Scan scan = MetaTableAccessor.getScanForTableName(hbaseConn, 
tableName);
+                Scan scan = CompatUtil.getScanForTableName(hbaseConn, 
tableName);
                 SingleColumnValueFilter scvf = null;
                 if (Reference.isTopFileRegion(r.getFileRegion())) {
                     scvf = new 
SingleColumnValueFilter(HConstants.CATALOG_FAMILY,
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/execute/DelegateHTable.java 
b/phoenix-core/src/main/java/org/apache/phoenix/execute/DelegateHTable.java
index 5b0b268..88e46d1 100644
--- a/phoenix-core/src/main/java/org/apache/phoenix/execute/DelegateHTable.java
+++ b/phoenix-core/src/main/java/org/apache/phoenix/execute/DelegateHTable.java
@@ -163,11 +163,6 @@ public class DelegateHTable extends CompatDelegateHTable 
implements Table {
     }
 
     @Override
-    public void mutateRow(RowMutations rm) throws IOException {
-        delegate.mutateRow(rm);
-    }
-
-    @Override
     public Result append(Append append) throws IOException {
         return delegate.append(append);
     }
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/hbase/index/parallel/ThreadPoolManager.java
 
b/phoenix-core/src/main/java/org/apache/phoenix/hbase/index/parallel/ThreadPoolManager.java
index 3dbe439..ea62cc5 100644
--- 
a/phoenix-core/src/main/java/org/apache/phoenix/hbase/index/parallel/ThreadPoolManager.java
+++ 
b/phoenix-core/src/main/java/org/apache/phoenix/hbase/index/parallel/ThreadPoolManager.java
@@ -32,6 +32,7 @@ import org.slf4j.LoggerFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
 import org.apache.hadoop.hbase.util.Threads;
+import 
org.apache.phoenix.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 /**
  * Manage access to thread pools
@@ -89,7 +90,9 @@ public class ThreadPoolManager {
     ShutdownOnUnusedThreadPoolExecutor pool =
         new ShutdownOnUnusedThreadPoolExecutor(maxThreads, maxThreads, 
keepAliveTime,
             TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(),
-            Threads.newDaemonThreadFactory(builder.getName() + "-"), 
builder.getName());
+            new 
ThreadFactoryBuilder().setNameFormat(builder.getName()+"-pool-%d")
+            
.setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER).build(),
+            builder.getName());
     pool.allowCoreThreadTimeOut(true);
     return pool;
   }
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/schema/MetaDataSplitPolicy.java 
b/phoenix-core/src/main/java/org/apache/phoenix/schema/MetaDataSplitPolicy.java
index 365ff5c..e5a0c33 100644
--- 
a/phoenix-core/src/main/java/org/apache/phoenix/schema/MetaDataSplitPolicy.java
+++ 
b/phoenix-core/src/main/java/org/apache/phoenix/schema/MetaDataSplitPolicy.java
@@ -23,24 +23,35 @@ import org.apache.phoenix.query.QueryServicesOptions;
 
 public class MetaDataSplitPolicy extends SplitOnLeadingVarCharColumnsPolicy {
 
-       @Override
-       protected boolean shouldSplit() {
-               Configuration conf = getConf();
-               boolean allowSplittableSystemCatalogRollback = conf.getBoolean
-                               
(QueryServices.ALLOW_SPLITTABLE_SYSTEM_CATALOG_ROLLBACK,
-                                               
QueryServicesOptions.DEFAULT_ALLOW_SPLITTABLE_SYSTEM_CATALOG_ROLLBACK);
-               boolean allowSystemCatalogToSplit = 
conf.getBoolean(QueryServices.SYSTEM_CATALOG_SPLITTABLE,
-                               
QueryServicesOptions.DEFAULT_SYSTEM_CATALOG_SPLITTABLE);
-               return super.shouldSplit() && allowSystemCatalogToSplit && 
!allowSplittableSystemCatalogRollback;
-       }
+    private boolean allowSystemCatalogToSplit() {
+        Configuration conf = getConf();
+        boolean allowSplittableSystemCatalogRollback =
+                
conf.getBoolean(QueryServices.ALLOW_SPLITTABLE_SYSTEM_CATALOG_ROLLBACK,
+                    
QueryServicesOptions.DEFAULT_ALLOW_SPLITTABLE_SYSTEM_CATALOG_ROLLBACK);
+        boolean allowSystemCatalogToSplit =
+                conf.getBoolean(QueryServices.SYSTEM_CATALOG_SPLITTABLE,
+                    QueryServicesOptions.DEFAULT_SYSTEM_CATALOG_SPLITTABLE);
+        return allowSystemCatalogToSplit && 
!allowSplittableSystemCatalogRollback;
+    }
 
-       @Override
-       protected int getColumnToSplitAt() {
-               // SYSTEM.CATALOG rowkey is (tenant id, schema name, table 
name, column name,
-               // column family) ensure all meta data rows for a given schema 
are in the same
-               // region (indexes and tables are in the same schema as we lock 
the parent table
-               // when modifying an index)
-               return 2;
-       }
+    //This only exists in HBase 2.4+
+    @Override
+    protected boolean canSplit() {
+        return super.canSplit() && allowSystemCatalogToSplit();
+    }
+
+    @Override
+    protected boolean shouldSplit() {
+        return super.shouldSplit() && allowSystemCatalogToSplit();
+    }
+
+    @Override
+    protected int getColumnToSplitAt() {
+        // SYSTEM.CATALOG rowkey is (tenant id, schema name, table name, 
column name,
+        // column family) ensure all meta data rows for a given schema are in 
the same
+        // region (indexes and tables are in the same schema as we lock the 
parent table
+        // when modifying an index)
+        return 2;
+    }
 
 }
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/schema/SplitOnLeadingVarCharColumnsPolicy.java
 
b/phoenix-core/src/main/java/org/apache/phoenix/schema/SplitOnLeadingVarCharColumnsPolicy.java
index 80551f5..8eb22d7 100644
--- 
a/phoenix-core/src/main/java/org/apache/phoenix/schema/SplitOnLeadingVarCharColumnsPolicy.java
+++ 
b/phoenix-core/src/main/java/org/apache/phoenix/schema/SplitOnLeadingVarCharColumnsPolicy.java
@@ -17,10 +17,10 @@
  */
 package org.apache.phoenix.schema;
 
-import org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy;
+import org.apache.phoenix.compat.hbase.CompatSteppingSplitPolicy;
 import org.apache.phoenix.util.SchemaUtil;
 
-public abstract class SplitOnLeadingVarCharColumnsPolicy extends 
SteppingSplitPolicy {
+public abstract class SplitOnLeadingVarCharColumnsPolicy extends 
CompatSteppingSplitPolicy {
     abstract protected int getColumnToSplitAt();
     
     protected final byte[] getSplitPoint(byte[] splitPoint) {
diff --git 
a/phoenix-core/src/main/java/org/apache/phoenix/transaction/OmidTransactionTable.java
 
b/phoenix-core/src/main/java/org/apache/phoenix/transaction/OmidTransactionTable.java
index 886ca60..cdd8349 100644
--- 
a/phoenix-core/src/main/java/org/apache/phoenix/transaction/OmidTransactionTable.java
+++ 
b/phoenix-core/src/main/java/org/apache/phoenix/transaction/OmidTransactionTable.java
@@ -215,11 +215,6 @@ public class OmidTransactionTable extends 
CompatOmidTransactionTable implements
     }
 
     @Override
-    public void mutateRow(RowMutations rm) throws IOException {
-        throw new UnsupportedOperationException();
-    }
-
-    @Override
     public Result append(Append append) throws IOException {
         throw new UnsupportedOperationException();
     }
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
index a55ae5b..089e44a 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
@@ -17,6 +17,9 @@
  */
 package org.apache.phoenix.compat.hbase;
 
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatDelegateHTable implements Table {
@@ -27,4 +30,9 @@ public abstract class CompatDelegateHTable implements Table {
         this.delegate = delegate;
     }
 
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        delegate.mutateRow(rm);
+    }
+
 }
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
index d01868b..573196e 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
@@ -17,7 +17,15 @@
  */
 package org.apache.phoenix.compat.hbase;
 
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatOmidTransactionTable implements Table {
+
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        throw new UnsupportedOperationException();
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
index ff296f3..194c4c3 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
+++ 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
@@ -20,7 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.hbase.ipc.RpcScheduler;
 
 /**
- * {@link RpcScheduler} that first checks to see if this is an index or 
metedata update before
+ * {@link RpcScheduler} that first checks to see if this is an index or 
metadata update before
  * passing off the call to the delegate {@link RpcScheduler}.
  */
 public abstract class CompatPhoenixRpcScheduler extends RpcScheduler {
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
similarity index 79%
copy from 
phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
copy to 
phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
index d01868b..5f700b0 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
@@ -17,7 +17,13 @@
  */
 package org.apache.phoenix.compat.hbase;
 
-import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy;
+
+public class CompatSteppingSplitPolicy extends SteppingSplitPolicy {
+
+    protected boolean canSplit() {
+        //dummy
+        return false;
+    }
 
-public abstract class CompatOmidTransactionTable implements Table {
 }
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
index 7b9d36a..a7d9ced 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
+++ 
b/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
@@ -20,7 +20,10 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellComparatorImpl;
-
+import org.apache.hadoop.hbase.MetaTableAccessor;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
 import org.apache.hadoop.hbase.regionserver.StoreFileWriter;
@@ -52,4 +55,8 @@ public class CompatUtil {
             CellComparatorImpl cellComparator) {
         return builder.withComparator(cellComparator);
     }
+
+    public static Scan getScanForTableName(Connection conn, TableName 
tableName) {
+        return MetaTableAccessor.getScanForTableName(conn, tableName);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
index a55ae5b..a862073 100644
--- 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
@@ -17,6 +17,9 @@
  */
 package org.apache.phoenix.compat.hbase;
 
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatDelegateHTable implements Table {
@@ -27,4 +30,8 @@ public abstract class CompatDelegateHTable implements Table {
         this.delegate = delegate;
     }
 
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        delegate.mutateRow(rm);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
index d01868b..573196e 100644
--- 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
@@ -17,7 +17,15 @@
  */
 package org.apache.phoenix.compat.hbase;
 
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatOmidTransactionTable implements Table {
+
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        throw new UnsupportedOperationException();
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
index 13d69a7..b749a25 100644
--- 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
+++ 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
@@ -20,7 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.hbase.ipc.RpcScheduler;
 
 /**
- * {@link RpcScheduler} that first checks to see if this is an index or 
metedata update before
+ * {@link RpcScheduler} that first checks to see if this is an index or 
metadata update before
  * passing off the call to the delegate {@link RpcScheduler}.
  */
 public abstract class CompatPhoenixRpcScheduler extends RpcScheduler {
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
similarity index 79%
copy from 
phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
copy to 
phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
index d01868b..5f700b0 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
@@ -17,7 +17,13 @@
  */
 package org.apache.phoenix.compat.hbase;
 
-import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy;
+
+public class CompatSteppingSplitPolicy extends SteppingSplitPolicy {
+
+    protected boolean canSplit() {
+        //dummy
+        return false;
+    }
 
-public abstract class CompatOmidTransactionTable implements Table {
 }
diff --git 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
index b2cefe4..b11e8e7 100644
--- 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
+++ 
b/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
@@ -20,6 +20,10 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellComparatorImpl;
+import org.apache.hadoop.hbase.MetaTableAccessor;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
 import org.apache.hadoop.hbase.regionserver.StoreFileWriter;
@@ -51,4 +55,8 @@ public class CompatUtil {
             CellComparatorImpl cellComparator) {
         return builder.withComparator(cellComparator);
     }
+
+    public static Scan getScanForTableName(Connection conn, TableName 
tableName) {
+        return MetaTableAccessor.getScanForTableName(conn, tableName);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
index 770e858..d7ae605 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
@@ -20,6 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import java.io.IOException;
 
 import org.apache.hadoop.hbase.client.RegionLocator;
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatDelegateHTable implements Table {
@@ -34,4 +35,9 @@ public abstract class CompatDelegateHTable implements Table {
     public RegionLocator getRegionLocator() throws IOException {
         return delegate.getRegionLocator();
     }
+
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        delegate.mutateRow(rm);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
index e1396ca..8baa2f3 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
@@ -20,6 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import java.io.IOException;
 
 import org.apache.hadoop.hbase.client.RegionLocator;
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatOmidTransactionTable implements Table {
@@ -28,4 +29,9 @@ public abstract class CompatOmidTransactionTable implements 
Table {
     public RegionLocator getRegionLocator() throws IOException {
         throw new UnsupportedOperationException();
     }
+
+    @Override
+    public void mutateRow(RowMutations rm) throws IOException {
+        throw new UnsupportedOperationException();
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
index 13d69a7..b749a25 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
+++ 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
@@ -20,7 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.hbase.ipc.RpcScheduler;
 
 /**
- * {@link RpcScheduler} that first checks to see if this is an index or 
metedata update before
+ * {@link RpcScheduler} that first checks to see if this is an index or 
metadata update before
  * passing off the call to the delegate {@link RpcScheduler}.
  */
 public abstract class CompatPhoenixRpcScheduler extends RpcScheduler {
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
similarity index 79%
copy from 
phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
copy to 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
index d01868b..5f700b0 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
@@ -17,7 +17,13 @@
  */
 package org.apache.phoenix.compat.hbase;
 
-import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy;
+
+public class CompatSteppingSplitPolicy extends SteppingSplitPolicy {
+
+    protected boolean canSplit() {
+        //dummy
+        return false;
+    }
 
-public abstract class CompatOmidTransactionTable implements Table {
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
index efe6efb..e2ee693 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
+++ 
b/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
@@ -21,6 +21,10 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellComparator;
 import org.apache.hadoop.hbase.CellComparatorImpl;
+import org.apache.hadoop.hbase.MetaTableAccessor;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
@@ -69,4 +73,8 @@ public class CompatUtil {
             CellComparatorImpl cellComparator) {
         return builder;
     }
+
+    public static Scan getScanForTableName(Connection conn, TableName 
tableName) {
+        return MetaTableAccessor.getScanForTableName(conn, tableName);
+    }
 }
diff --git a/phoenix-hbase-compat-2.4.0/pom.xml 
b/phoenix-hbase-compat-2.4.0/pom.xml
new file mode 100644
index 0000000..72a7cf2
--- /dev/null
+++ b/phoenix-hbase-compat-2.4.0/pom.xml
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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.
+-->
+<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";>
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.phoenix</groupId>
+    <artifactId>phoenix</artifactId>
+    <version>5.1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>phoenix-hbase-compat-2.4.0</artifactId>
+  <name>Phoenix Hbase 2.4.0 compatibility</name>
+  <description>Compatibility module for HBase 2.4.0+</description>
+
+  <properties>
+    <hbase24.compat.version>2.4.0</hbase24.compat.version>
+  </properties>
+
+  <dependencies>
+     <!-- HBase dependencies -->
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-client</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-common</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-server</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <!-- Override parent dependencyManagement for transitive HBase 
dependencies -->
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-hadoop-compat</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-hadoop2-compat</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+        <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-protocol</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-protocol-shaded</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-zookeeper</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-metrics</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hbase</groupId>
+      <artifactId>hbase-metrics-api</artifactId>
+      <version>${hbase24.compat.version}</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+</project>
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
similarity index 85%
copy from 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
index 770e858..a255732 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
@@ -20,6 +20,8 @@ package org.apache.phoenix.compat.hbase;
 import java.io.IOException;
 
 import org.apache.hadoop.hbase.client.RegionLocator;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatDelegateHTable implements Table {
@@ -34,4 +36,9 @@ public abstract class CompatDelegateHTable implements Table {
     public RegionLocator getRegionLocator() throws IOException {
         return delegate.getRegionLocator();
     }
+
+    @Override
+    public Result mutateRow(RowMutations rm) throws IOException {
+        return delegate.mutateRow(rm);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
similarity index 83%
copy from 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
index e1396ca..ae7992f 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
@@ -20,6 +20,8 @@ package org.apache.phoenix.compat.hbase;
 import java.io.IOException;
 
 import org.apache.hadoop.hbase.client.RegionLocator;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.RowMutations;
 import org.apache.hadoop.hbase.client.Table;
 
 public abstract class CompatOmidTransactionTable implements Table {
@@ -28,4 +30,9 @@ public abstract class CompatOmidTransactionTable implements 
Table {
     public RegionLocator getRegionLocator() throws IOException {
         throw new UnsupportedOperationException();
     }
+
+    @Override
+    public Result mutateRow(RowMutations rm) throws IOException {
+        throw new UnsupportedOperationException();
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPermissionUtil.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPermissionUtil.java
new file mode 100644
index 0000000..80a99b3
--- /dev/null
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPermissionUtil.java
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+package org.apache.phoenix.compat.hbase;
+
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.security.access.AccessChecker;
+import org.apache.hadoop.hbase.security.access.Permission;
+import org.apache.hadoop.hbase.security.access.UserPermission;
+import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
+
+public class CompatPermissionUtil {
+
+    private CompatPermissionUtil() {
+        //Not to be instantiated
+    }
+
+    public static AccessChecker newAccessChecker(final Configuration conf, 
ZKWatcher zk) {
+        //Ignore ZK parameter
+        return new AccessChecker(conf);
+    }
+
+    public static void stopAccessChecker(AccessChecker accessChecker) throws 
IOException {
+        //NOOP
+    }
+
+    public static String getUserFromUP(UserPermission userPermission) {
+        return userPermission.getUser();
+    }
+
+    public static Permission getPermissionFromUP(UserPermission 
userPermission) {
+        return userPermission.getPermission();
+    }
+
+    public static boolean authorizeUserTable(AccessChecker accessChecker, User 
user,
+            TableName table, Permission.Action action) {
+        // This also checks for group access
+        return accessChecker.getAuthManager().authorizeUserTable(user, table, 
action);
+    }
+
+}
diff --git 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
similarity index 98%
copy from 
phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
index 13d69a7..b749a25 100644
--- 
a/phoenix-hbase-compat-2.2.1/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatPhoenixRpcScheduler.java
@@ -20,7 +20,7 @@ package org.apache.phoenix.compat.hbase;
 import org.apache.hadoop.hbase.ipc.RpcScheduler;
 
 /**
- * {@link RpcScheduler} that first checks to see if this is an index or 
metedata update before
+ * {@link RpcScheduler} that first checks to see if this is an index or 
metadata update before
  * passing off the call to the delegate {@link RpcScheduler}.
  */
 public abstract class CompatPhoenixRpcScheduler extends RpcScheduler {
diff --git 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
similarity index 86%
copy from 
phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
index d01868b..f185153 100644
--- 
a/phoenix-hbase-compat-2.1.6/src/main/java/org/apache/phoenix/compat/hbase/CompatOmidTransactionTable.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatSteppingSplitPolicy.java
@@ -17,7 +17,8 @@
  */
 package org.apache.phoenix.compat.hbase;
 
-import org.apache.hadoop.hbase.client.Table;
+import org.apache.hadoop.hbase.regionserver.SteppingSplitPolicy;
+
+public class CompatSteppingSplitPolicy extends SteppingSplitPolicy {
 
-public abstract class CompatOmidTransactionTable implements Table {
 }
diff --git 
a/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatStoreFileReader.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatStoreFileReader.java
new file mode 100644
index 0000000..03aa257
--- /dev/null
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatStoreFileReader.java
@@ -0,0 +1,48 @@
+/*
+ * 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.
+ */
+package org.apache.phoenix.compat.hbase;
+
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.fs.HFileSystem;
+import org.apache.hadoop.hbase.io.FSDataInputStreamWrapper;
+import org.apache.hadoop.hbase.io.hfile.CacheConfig;
+import org.apache.hadoop.hbase.io.hfile.HFileInfo;
+import org.apache.hadoop.hbase.io.hfile.ReaderContext;
+import org.apache.hadoop.hbase.io.hfile.ReaderContext.ReaderType;
+import org.apache.hadoop.hbase.regionserver.StoreFileReader;
+
+public class CompatStoreFileReader extends StoreFileReader {
+
+    public CompatStoreFileReader(final FileSystem fs, final Path p,
+            final FSDataInputStreamWrapper in, long size, final CacheConfig 
cacheConf,
+            boolean primaryReplicaStoreFile, AtomicInteger refCount, final 
Configuration conf)
+            throws IOException {
+        super(new ReaderContext(p, in, size, new HFileSystem(fs), 
primaryReplicaStoreFile,
+                ReaderType.STREAM),
+                new HFileInfo(new ReaderContext(p, in, size, new 
HFileSystem(fs),
+                        primaryReplicaStoreFile, ReaderType.STREAM), conf),
+                cacheConf, refCount, conf);
+        getHFileReader().getHFileInfo().initMetaAndIndex(getHFileReader());
+    }
+
+}
\ No newline at end of file
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
similarity index 89%
copy from 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
index efe6efb..bb2dcf5 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/CompatUtil.java
@@ -21,6 +21,10 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellComparator;
 import org.apache.hadoop.hbase.CellComparatorImpl;
+import org.apache.hadoop.hbase.MetaTableAccessor;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
 import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
@@ -69,4 +73,8 @@ public class CompatUtil {
             CellComparatorImpl cellComparator) {
         return builder;
     }
+
+    public static Scan getScanForTableName(Connection conn, TableName 
tableName) {
+        return MetaTableAccessor.getScanForTableName(conn.getConfiguration(), 
tableName);
+    }
 }
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/HbaseCompatCapabilities.java
similarity index 51%
copy from 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/HbaseCompatCapabilities.java
index 770e858..47b151a 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/HbaseCompatCapabilities.java
@@ -15,23 +15,25 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.phoenix.compat.hbase;
 
-import java.io.IOException;
+public class HbaseCompatCapabilities {
 
-import org.apache.hadoop.hbase.client.RegionLocator;
-import org.apache.hadoop.hbase.client.Table;
+    public static boolean isMaxLookbackTimeSupported() {
+        return true;
+    }
 
-public abstract class CompatDelegateHTable implements Table {
+    //In HBase 2.1 and 2.2, a lookback query won't return any results if 
covered by a future delete,
+    //but in 2.3 and later we have the preSoreScannerOpen hook that overrides 
that behavior
+    public static boolean isLookbackBeyondDeletesSupported() { return true; }
 
-    protected final Table delegate;
+    //HBase 2.1 does not have HBASE-22710, which is necessary for raw scan 
skip scan and
+    // AllVersionsIndexRebuild filters to
+    // show all versions properly. HBase 2.2.5+ and HBase 2.3.0+ have this fix.
+    public static boolean isRawFilterSupported() { return true; }
 
-    public CompatDelegateHTable(Table delegate) {
-        this.delegate = delegate;
-    }
+    //HBase 2.3+ has preWALAppend() on RegionObserver (HBASE-22623)
+    public static boolean hasPreWALAppend() { return false; }
 
-    @Override
-    public RegionLocator getRegionLocator() throws IOException {
-        return delegate.getRegionLocator();
-    }
 }
diff --git 
a/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/OffsetCell.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/OffsetCell.java
new file mode 100644
index 0000000..c5485a5
--- /dev/null
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/OffsetCell.java
@@ -0,0 +1,136 @@
+/*
+ * 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.
+ */
+package org.apache.phoenix.compat.hbase;
+
+import org.apache.hadoop.hbase.Cell;
+
+public class OffsetCell implements Cell {
+
+    private Cell cell;
+    private int offset;
+
+    public OffsetCell(Cell cell, int offset) {
+        this.cell = cell;
+        this.offset = offset;
+    }
+
+    @Override
+    public byte[] getRowArray() {
+        return cell.getRowArray();
+    }
+
+    @Override
+    public int getRowOffset() {
+        return cell.getRowOffset() + offset;
+    }
+
+    @Override
+    public short getRowLength() {
+        return (short) (cell.getRowLength() - offset);
+    }
+
+    @Override
+    public byte[] getFamilyArray() {
+        return cell.getFamilyArray();
+    }
+
+    @Override
+    public int getFamilyOffset() {
+        return cell.getFamilyOffset();
+    }
+
+    @Override
+    public byte getFamilyLength() {
+        return cell.getFamilyLength();
+    }
+
+    @Override
+    public byte[] getQualifierArray() {
+        return cell.getQualifierArray();
+    }
+
+    @Override
+    public int getQualifierOffset() {
+        return cell.getQualifierOffset();
+    }
+
+    @Override
+    public int getQualifierLength() {
+        return cell.getQualifierLength();
+    }
+
+    @Override
+    public long getTimestamp() {
+        return cell.getTimestamp();
+    }
+
+    @Override
+    public byte getTypeByte() {
+        return cell.getTypeByte();
+    }
+
+    @Override public long getSequenceId() {
+        return cell.getSequenceId();
+    }
+
+    @Override
+    public byte[] getValueArray() {
+        return cell.getValueArray();
+    }
+
+    @Override
+    public int getValueOffset() {
+        return cell.getValueOffset();
+    }
+
+    @Override
+    public int getValueLength() {
+        return cell.getValueLength();
+    }
+
+    @Override
+    public byte[] getTagsArray() {
+        return cell.getTagsArray();
+    }
+
+    @Override
+    public int getTagsOffset() {
+        return cell.getTagsOffset();
+    }
+
+    @Override
+    public int getTagsLength() {
+        return cell.getTagsLength();
+    }
+
+    @Override
+    public Type getType() {
+        return cell.getType();
+    }
+
+    @Override
+    public long heapSize() {
+        return cell.heapSize();
+    }
+
+    @Override
+    public int getSerializedSize() {
+        return cell.getSerializedSize() - offset;
+    }
+
+}
diff --git 
a/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatBaseScannerRegionObserver.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatBaseScannerRegionObserver.java
new file mode 100644
index 0000000..cd1a7f5
--- /dev/null
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatBaseScannerRegionObserver.java
@@ -0,0 +1,197 @@
+/*
+ * 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.
+ */
+package org.apache.phoenix.compat.hbase.coprocessor;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.KeepDeletedCells;
+import org.apache.hadoop.hbase.MemoryCompactionPolicy;
+import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.coprocessor.ObserverContext;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
+import org.apache.hadoop.hbase.coprocessor.RegionObserver;
+import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker;
+import org.apache.hadoop.hbase.regionserver.ScanOptions;
+import org.apache.hadoop.hbase.regionserver.ScanType;
+import org.apache.hadoop.hbase.regionserver.Store;
+import 
org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;
+import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
+
+import java.io.IOException;
+
+public class CompatBaseScannerRegionObserver implements RegionObserver {
+
+    public static final String PHOENIX_MAX_LOOKBACK_AGE_CONF_KEY =
+        "phoenix.max.lookback.age.seconds";
+    public static final int DEFAULT_PHOENIX_MAX_LOOKBACK_AGE = 0;
+
+    public void 
preCompactScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Store 
store,
+                                             ScanType scanType, ScanOptions 
options, CompactionLifeCycleTracker tracker,
+                                             CompactionRequest request) throws 
IOException {
+        Configuration conf = c.getEnvironment().getConfiguration();
+        if (isMaxLookbackTimeEnabled(conf)) {
+            setScanOptionsForFlushesAndCompactions(conf, options, store, 
scanType);
+        }
+    }
+
+    public void 
preFlushScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Store 
store,
+                                                ScanOptions options, 
FlushLifeCycleTracker tracker) throws IOException {
+        Configuration conf = c.getEnvironment().getConfiguration();
+        if (isMaxLookbackTimeEnabled(conf)) {
+            setScanOptionsForFlushesAndCompactions(conf, options, store, 
ScanType.COMPACT_RETAIN_DELETES);
+        }
+    }
+
+    public void preMemStoreCompactionCompactScannerOpen(
+        ObserverContext<RegionCoprocessorEnvironment> c, Store store, 
ScanOptions options)
+        throws IOException {
+        Configuration conf = c.getEnvironment().getConfiguration();
+        if (isMaxLookbackTimeEnabled(conf)) {
+            MemoryCompactionPolicy inMemPolicy =
+                store.getColumnFamilyDescriptor().getInMemoryCompaction();
+            ScanType scanType;
+            //the eager and adaptive in-memory compaction policies can purge 
versions; the others
+            // can't. (Eager always does; adaptive sometimes does)
+            if (inMemPolicy.equals(MemoryCompactionPolicy.EAGER) ||
+                inMemPolicy.equals(MemoryCompactionPolicy.ADAPTIVE)) {
+                scanType = ScanType.COMPACT_DROP_DELETES;
+            } else {
+                scanType = ScanType.COMPACT_RETAIN_DELETES;
+            }
+            setScanOptionsForFlushesAndCompactions(conf, options, store, 
scanType);
+        }
+    }
+
+    public void 
preStoreScannerOpen(ObserverContext<RegionCoprocessorEnvironment> ctx, Store 
store,
+                                           ScanOptions options) throws 
IOException {
+
+        if (!storeFileScanDoesntNeedAlteration(options)) {
+            //PHOENIX-4277 -- When doing a point-in-time (SCN) Scan, HBase by 
default will hide
+            // mutations that happen before a delete marker. This overrides 
that behavior.
+            options.setMinVersions(options.getMinVersions());
+            KeepDeletedCells keepDeletedCells = KeepDeletedCells.TRUE;
+            if (store.getColumnFamilyDescriptor().getTimeToLive() != 
HConstants.FOREVER) {
+                keepDeletedCells = KeepDeletedCells.TTL;
+            }
+            options.setKeepDeletedCells(keepDeletedCells);
+        }
+    }
+
+    private boolean storeFileScanDoesntNeedAlteration(ScanOptions options) {
+        Scan scan = options.getScan();
+        boolean isRaw = scan.isRaw();
+        //true if keep deleted cells is either TRUE or TTL
+        boolean keepDeletedCells = 
options.getKeepDeletedCells().equals(KeepDeletedCells.TRUE) ||
+            options.getKeepDeletedCells().equals(KeepDeletedCells.TTL);
+        boolean timeRangeIsLatest = scan.getTimeRange().getMax() == 
HConstants.LATEST_TIMESTAMP;
+        boolean timestampIsTransactional =
+            isTransactionalTimestamp(scan.getTimeRange().getMax());
+        return isRaw
+            || keepDeletedCells
+            || timeRangeIsLatest
+            || timestampIsTransactional;
+    }
+
+    private boolean isTransactionalTimestamp(long ts) {
+        //have to use the HBase edge manager because the Phoenix one is in 
phoenix-core
+        return ts > (long) (EnvironmentEdgeManager.currentTime() * 1.1);
+    }
+
+    /*
+     * If KeepDeletedCells.FALSE, KeepDeletedCells.TTL ,
+     * let delete markers age once lookback age is done.
+     */
+    public KeepDeletedCells getKeepDeletedCells(ScanOptions options, ScanType 
scanType) {
+        //if we're doing a minor compaction or flush, always set keep deleted 
cells
+        //to true. Otherwise, if keep deleted cells is false or TTL, use 
KeepDeletedCells TTL,
+        //where the value of the ttl might be overriden to the max lookback 
age elsewhere
+        return (options.getKeepDeletedCells() == KeepDeletedCells.TRUE
+                || scanType.equals(ScanType.COMPACT_RETAIN_DELETES)) ?
+                KeepDeletedCells.TRUE : KeepDeletedCells.TTL;
+    }
+
+    /*
+     * if the user set a TTL we should leave MIN_VERSIONS at the default (0 in 
most of the cases).
+     * Otherwise the data (1st version) will not be removed after the TTL. If 
no TTL, we want
+     * Math.max(maxVersions, minVersions, 1)
+     */
+    public int getMinVersions(ScanOptions options, ColumnFamilyDescriptor 
cfDescriptor) {
+        return cfDescriptor.getTimeToLive() != HConstants.FOREVER ? 
options.getMinVersions()
+            : Math.max(Math.max(options.getMinVersions(),
+            cfDescriptor.getMaxVersions()),1);
+    }
+
+    /**
+     *
+     * @param conf HBase Configuration
+     * @param columnDescriptor ColumnFamilyDescriptor for the store being 
compacted
+     * @param options ScanOptions of overrides to the compaction scan
+     * @return Time to live in milliseconds, based on both HBase TTL and 
Phoenix max lookback age
+     */
+    public long getTimeToLiveForCompactions(Configuration conf,
+                                                   ColumnFamilyDescriptor 
columnDescriptor,
+                                                   ScanOptions options) {
+        long ttlConfigured = columnDescriptor.getTimeToLive();
+        long ttlInMillis = ttlConfigured * 1000;
+        long maxLookbackTtl = getMaxLookbackInMillis(conf);
+        if (isMaxLookbackTimeEnabled(maxLookbackTtl)) {
+            if (ttlConfigured == HConstants.FOREVER
+                && columnDescriptor.getKeepDeletedCells() != 
KeepDeletedCells.TRUE) {
+                // If user configured default TTL(FOREVER) and keep deleted 
cells to false or
+                // TTL then to remove unwanted delete markers we should change 
ttl to max lookback age
+                ttlInMillis = maxLookbackTtl;
+            } else {
+                //if there is a TTL, use TTL instead of max lookback age.
+                // Max lookback age should be more recent or equal to TTL
+                ttlInMillis = Math.max(ttlInMillis, maxLookbackTtl);
+            }
+        }
+
+        return ttlInMillis;
+    }
+
+    public void setScanOptionsForFlushesAndCompactions(Configuration conf,
+                                                               ScanOptions 
options,
+                                                               final Store 
store,
+                                                               ScanType type) {
+        ColumnFamilyDescriptor cfDescriptor = 
store.getColumnFamilyDescriptor();
+        options.setTTL(getTimeToLiveForCompactions(conf, cfDescriptor,
+            options));
+        options.setKeepDeletedCells(getKeepDeletedCells(options, type));
+        options.setMaxVersions(Integer.MAX_VALUE);
+        options.setMinVersions(getMinVersions(options, cfDescriptor));
+    }
+
+    public static long getMaxLookbackInMillis(Configuration conf){
+        //config param is in seconds, switch to millis
+        return conf.getLong(PHOENIX_MAX_LOOKBACK_AGE_CONF_KEY,
+            DEFAULT_PHOENIX_MAX_LOOKBACK_AGE) * 1000;
+    }
+
+    public static boolean isMaxLookbackTimeEnabled(Configuration conf){
+        return 
isMaxLookbackTimeEnabled(conf.getLong(PHOENIX_MAX_LOOKBACK_AGE_CONF_KEY,
+            DEFAULT_PHOENIX_MAX_LOOKBACK_AGE));
+    }
+
+    public static boolean isMaxLookbackTimeEnabled(long maxLookbackTime){
+        return maxLookbackTime > 0L;
+    }
+
+}
diff --git 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatIndexRegionObserver.java
similarity index 53%
copy from 
phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
copy to 
phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatIndexRegionObserver.java
index 770e858..f887ed3 100644
--- 
a/phoenix-hbase-compat-2.3.0/src/main/java/org/apache/phoenix/compat/hbase/CompatDelegateHTable.java
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/coprocessor/CompatIndexRegionObserver.java
@@ -15,23 +15,26 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.phoenix.compat.hbase;
+package org.apache.phoenix.compat.hbase.coprocessor;
 
-import java.io.IOException;
+import org.apache.hadoop.hbase.coprocessor.RegionObserver;
+import org.apache.hadoop.hbase.wal.WALKey;
 
-import org.apache.hadoop.hbase.client.RegionLocator;
-import org.apache.hadoop.hbase.client.Table;
+import java.util.HashMap;
+import java.util.Map;
 
-public abstract class CompatDelegateHTable implements Table {
+public class CompatIndexRegionObserver implements RegionObserver {
 
-    protected final Table delegate;
+    public static void appendToWALKey(WALKey key, String attrKey, byte[] 
attrValue) {
+        key.addExtendedAttribute(attrKey, attrValue);
+    }
 
-    public CompatDelegateHTable(Table delegate) {
-        this.delegate = delegate;
+    public static byte[] getAttributeValueFromWALKey(WALKey key, String 
attrKey) {
+        return key.getExtendedAttribute(attrKey);
     }
 
-    @Override
-    public RegionLocator getRegionLocator() throws IOException {
-        return delegate.getRegionLocator();
+    public static Map<String, byte[]> getAttributeValuesFromWALKey(WALKey key) 
{
+        return new HashMap<String, byte[]>(key.getExtendedAttributes());
     }
+
 }
diff --git 
a/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/test/DelegateCell.java
 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/test/DelegateCell.java
new file mode 100644
index 0000000..0c7dfd8
--- /dev/null
+++ 
b/phoenix-hbase-compat-2.4.0/src/main/java/org/apache/phoenix/compat/hbase/test/DelegateCell.java
@@ -0,0 +1,139 @@
+/*
+ * 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.
+ */
+package org.apache.phoenix.compat.hbase.test;
+
+import org.apache.hadoop.hbase.Cell;
+
+public class DelegateCell implements Cell {
+    private final Cell delegate;
+    private final String name;
+    public DelegateCell(Cell delegate, String name) {
+        this.delegate = delegate;
+        this.name = name;
+    }
+
+    @Override
+    public int getValueOffset() {
+        return delegate.getValueOffset();
+    }
+
+    @Override
+    public int getValueLength() {
+        return delegate.getValueLength();
+    }
+
+    @Override
+    public byte[] getValueArray() {
+        return delegate.getValueArray();
+    }
+
+    @Override
+    public byte getTypeByte() {
+        return delegate.getTypeByte();
+    }
+
+    @Override
+    public long getTimestamp() {
+        return delegate.getTimestamp();
+    }
+
+    @Override
+    public int getTagsOffset() {
+        return delegate.getTagsOffset();
+    }
+
+    @Override
+    public byte[] getTagsArray() {
+        return delegate.getTagsArray();
+    }
+
+    @Override
+    public int getRowOffset() {
+        return delegate.getRowOffset();
+    }
+
+    @Override
+    public short getRowLength() {
+        return delegate.getRowLength();
+    }
+
+    @Override
+    public byte[] getRowArray() {
+        return delegate.getRowArray();
+    }
+
+    @Override
+    public int getQualifierOffset() {
+        return delegate.getQualifierOffset();
+    }
+
+    @Override
+    public int getQualifierLength() {
+        return delegate.getQualifierLength();
+    }
+
+    @Override
+    public byte[] getQualifierArray() {
+        return delegate.getQualifierArray();
+    }
+
+    @Override
+    public int getFamilyOffset() {
+        return delegate.getFamilyOffset();
+    }
+
+    @Override
+    public byte getFamilyLength() {
+        return delegate.getFamilyLength();
+    }
+
+    @Override
+    public byte[] getFamilyArray() {
+        return delegate.getFamilyArray();
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+
+    @Override
+    public long getSequenceId() {
+        return delegate.getSequenceId();
+    }
+
+    @Override
+    public int getTagsLength() {
+        return delegate.getTagsLength();
+    }
+
+    @Override
+    public Type getType() {
+        return delegate.getType();
+    }
+
+    @Override
+    public long heapSize() {
+        return delegate.heapSize();
+    }
+
+    @Override
+    public int getSerializedSize() {
+        return delegate.getSerializedSize();
+    }
+}
diff --git a/phoenix-server/pom.xml b/phoenix-server/pom.xml
index d189cb1..54f924f 100644
--- a/phoenix-server/pom.xml
+++ b/phoenix-server/pom.xml
@@ -426,5 +426,22 @@
         </dependency>
       </dependencies>
     </profile>
+    <profile>
+      <id>phoenix-hbase-compat-2.4.0</id>
+      <!-- keep dependency plugin happy -->
+      <activation>
+        <property>
+          <name>hbase.profile</name>
+          <value>2.4</value>
+        </property>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>org.apache.zookeeper</groupId>
+          <artifactId>zookeeper-jute</artifactId>
+          <scope>provided</scope>
+        </dependency>
+      </dependencies>
+    </profile>
   </profiles>
 </project>
diff --git a/pom.xml b/pom.xml
index d6a10cf..df6d2c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -40,6 +40,7 @@
   </organization>
 
   <modules>
+    <module>phoenix-hbase-compat-2.4.0</module>
     <module>phoenix-hbase-compat-2.3.0</module>
     <module>phoenix-hbase-compat-2.2.1</module>
     <module>phoenix-hbase-compat-2.1.6</module>
@@ -629,6 +630,11 @@
         <artifactId>phoenix-hbase-compat-2.3.0</artifactId>
         <version>${project.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.phoenix</groupId>
+        <artifactId>phoenix-hbase-compat-2.4.0</artifactId>
+        <version>${project.version}</version>
+      </dependency>
       <!-- Intra-project test dependencies -->
       <dependency>
         <groupId>org.apache.phoenix</groupId>
@@ -1526,6 +1532,25 @@
       </properties>
     </profile>
     <profile>
+      <!-- PHOENIX-5993 This won't work with the public HBase artifacts -->
+      <id>phoenix-hbase-compat-2.4.0</id>
+      <activation>
+        <property>
+          <name>hbase.profile</name>
+          <value>2.4</value>
+        </property>
+      </activation>
+      <properties>
+        <hbase.profile>2.4</hbase.profile>
+        <hbase.compat.version>2.4.0</hbase.compat.version>
+        <hbase.version>2.4.0</hbase.version>
+        <!-- PHOENIX-6010 3.1.3 doesn't work because of Guava rebase -->
+        <hadoop.version>3.1.2</hadoop.version>
+        <hbase.thirdparty.version>3.4.1</hbase.thirdparty.version>
+        <zookeeper.version>3.5.7</zookeeper.version>
+      </properties>
+    </profile>
+    <profile>
       <id>owasp-dependency-check</id>
       <activation>
         <property>

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