diff --git a/kylin-it/src/test/java/org/apache/kylin/provision/BuildCubeWithEngine.java b/kylin-it/src/test/java/org/apache/kylin/provision/BuildCubeWithEngine.java
index 4cee1ed..2a5979f 100644
--- a/kylin-it/src/test/java/org/apache/kylin/provision/BuildCubeWithEngine.java
+++ b/kylin-it/src/test/java/org/apache/kylin/provision/BuildCubeWithEngine.java
@@ -58,6 +58,7 @@
 import org.apache.kylin.job.execution.ExecutableState;
 import org.apache.kylin.job.impl.threadpool.DefaultScheduler;
 import org.apache.kylin.job.manager.ExecutableManager;
+import org.apache.kylin.storage.hbase.HBaseConnection;
 import org.apache.kylin.storage.hbase.util.HBaseRegionSizeCalculator;
 import org.apache.kylin.storage.hbase.util.StorageCleanupJob;
 import org.apache.kylin.storage.hbase.util.ZookeeperJobLock;
@@ -419,7 +420,7 @@
     }
 
     private void checkHFilesInHBase(CubeSegment segment) throws IOException {
-        Configuration conf = HBaseConfiguration.create(HadoopUtil.getCurrentConfiguration());
+        Connection conn = HBaseConnection.get(KylinConfig.getInstanceFromEnv().getStorageUrl());
         String tableName = segment.getStorageLocationIdentifier();
 
         HBaseRegionSizeCalculator cal = new HBaseRegionSizeCalculator(tableName, conn);
diff --git a/server-base/src/main/java/org/apache/kylin/rest/security/MockAclHBaseStorage.java b/server-base/src/main/java/org/apache/kylin/rest/security/MockAclHBaseStorage.java
index 492c176..16d6f9f 100644
--- a/server-base/src/main/java/org/apache/kylin/rest/security/MockAclHBaseStorage.java
+++ b/server-base/src/main/java/org/apache/kylin/rest/security/MockAclHBaseStorage.java
@@ -34,8 +34,8 @@
     private static final String aclTableName = "MOCK-ACL-TABLE";
     private static final String userTableName = "MOCK-USER-TABLE";
 
-    private HTableInterface mockedAclTable;
-    private HTableInterface mockedUserTable;
+    private Table mockedAclTable;
+    private Table mockedUserTable;
     private RealAclHBaseStorage realAcl;
 
     public MockAclHBaseStorage() {
diff --git a/server-base/src/main/java/org/apache/kylin/rest/service/CubeService.java b/server-base/src/main/java/org/apache/kylin/rest/service/CubeService.java
index 00b07d5..0503236 100644
--- a/server-base/src/main/java/org/apache/kylin/rest/service/CubeService.java
+++ b/server-base/src/main/java/org/apache/kylin/rest/service/CubeService.java
@@ -29,6 +29,7 @@
 import java.util.WeakHashMap;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.HTable;
 import java.util.*;
 import org.apache.kylin.common.KylinConfig;
@@ -65,6 +66,7 @@
 import org.apache.kylin.source.hive.HiveSourceTableLoader;
 import org.apache.kylin.source.hive.cardinality.HiveColumnCardinalityJob;
 import org.apache.kylin.source.hive.cardinality.HiveColumnCardinalityUpdateJob;
+import org.apache.kylin.storage.hbase.HBaseConnection;
 import org.apache.kylin.storage.hbase.util.HBaseRegionSizeCalculator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/server-base/src/main/java/org/apache/kylin/rest/service/QueryService.java b/server-base/src/main/java/org/apache/kylin/rest/service/QueryService.java
index 783616d..d095f2b 100644
--- a/server-base/src/main/java/org/apache/kylin/rest/service/QueryService.java
+++ b/server-base/src/main/java/org/apache/kylin/rest/service/QueryService.java
@@ -46,7 +46,6 @@
 import org.apache.commons.lang.StringUtils;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.HConnection;
 import org.apache.hadoop.hbase.client.Table;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.client.Result;
@@ -184,14 +183,10 @@
         List<Query> queries = new ArrayList<Query>();
         Table htable = null;
         try {
-<<<<<<< b6296775f7793a63baf7f6a97cf4c0759d654341:server-base/src/main/java/org/apache/kylin/rest/service/QueryService.java
-            HConnection conn = HBaseConnection.get(hbaseUrl);
+            org.apache.hadoop.hbase.client.Connection conn = HBaseConnection.get(hbaseUrl);
             HBaseConnection.createHTableIfNeeded(conn, userTableName, USER_QUERY_FAMILY);
 
-            htable = conn.getTable(userTableName);
-=======
             htable = HBaseConnection.get(hbaseUrl).getTable(TableName.valueOf(userTableName));
->>>>>>> KYLIN-1528 Create a branch for v1.5 with HBase 1.x API:server/src/main/java/org/apache/kylin/rest/service/QueryService.java
             Get get = new Get(Bytes.toBytes(creator));
             get.addFamily(Bytes.toBytes(USER_QUERY_FAMILY));
             Result result = htable.get(get);
diff --git a/server-base/src/main/java/org/apache/kylin/rest/service/UserService.java b/server-base/src/main/java/org/apache/kylin/rest/service/UserService.java
index 64c2c7d..e039534 100644
--- a/server-base/src/main/java/org/apache/kylin/rest/service/UserService.java
+++ b/server-base/src/main/java/org/apache/kylin/rest/service/UserService.java
@@ -146,17 +146,12 @@
     public void updateUser(UserDetails user) {
         Table htable = null;
         try {
-            byte[] userAuthorities = serialize(user.getAuthorities());
             htable = aclHBaseStorage.getTable(userTableName);
 
-<<<<<<< b6296775f7793a63baf7f6a97cf4c0759d654341:server-base/src/main/java/org/apache/kylin/rest/service/UserService.java
             Pair<byte[], byte[]> pair = userToHBaseRow(user);
             Put put = new Put(pair.getKey());
-            put.add(Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_FAMILY), Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_COLUMN), pair.getSecond());
-=======
-            Put put = new Put(Bytes.toBytes(user.getUsername()));
-            put.addColumn(Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_FAMILY), Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_COLUMN), userAuthorities);
->>>>>>> KYLIN-1528 Create a branch for v1.5 with HBase 1.x API:server/src/main/java/org/apache/kylin/rest/service/UserService.java
+
+            put.addColumn(Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_FAMILY), Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_COLUMN), pair.getSecond());
 
             htable.put(put);
         } catch (IOException e) {
@@ -219,13 +214,8 @@
         Scan s = new Scan();
         s.addColumn(Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_FAMILY), Bytes.toBytes(AclHBaseStorage.USER_AUTHORITY_COLUMN));
 
-<<<<<<< b6296775f7793a63baf7f6a97cf4c0759d654341:server-base/src/main/java/org/apache/kylin/rest/service/UserService.java
         List<UserDetails> all = new ArrayList<UserDetails>();
-        HTableInterface htable = null;
-=======
-        List<String> authorities = new ArrayList<String>();
         Table htable = null;
->>>>>>> KYLIN-1528 Create a branch for v1.5 with HBase 1.x API:server/src/main/java/org/apache/kylin/rest/service/UserService.java
         ResultScanner scanner = null;
         try {
             htable = aclHBaseStorage.getTable(userTableName);
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseConnection.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseConnection.java
index 05170a0..e7ee2f5 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseConnection.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseConnection.java
@@ -21,7 +21,7 @@
 import java.io.IOException;
 import java.util.Map;
 import java.util.UUID;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.*;
 
 import org.apache.commons.lang.StringUtils;
 import org.apache.hadoop.conf.Configuration;
@@ -35,6 +35,7 @@
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
+import org.apache.hadoop.hbase.util.Threads;
 import org.apache.kylin.common.KylinConfig;
 import org.apache.kylin.common.persistence.StorageException;
 import org.apache.kylin.engine.mr.HadoopUtil;
@@ -51,14 +52,20 @@
 
     private static final Logger logger = LoggerFactory.getLogger(HBaseConnection.class);
 
-    private static final Map<String, Configuration> ConfigCache = new ConcurrentHashMap<String, Configuration>();
-    private static final Map<String, Connection> ConnPool = new ConcurrentHashMap<String, Connection>();
+    private static final Map<String, Configuration> configCache = new ConcurrentHashMap<String, Configuration>();
+    private static final Map<String, Connection> connPool = new ConcurrentHashMap<String, Connection>();
+
+    private static final ThreadLocal<Configuration> configThreadLocal = new ThreadLocal<>();
+
+    private static ExecutorService coprocessorPool = null;
 
     static {
         Runtime.getRuntime().addShutdownHook(new Thread() {
             @Override
             public void run() {
-                for (Connection conn : ConnPool.values()) {
+                closeCoprocessorPool();
+
+                for (Connection conn : connPool.values()) {
                     try {
                         conn.close();
                     } catch (IOException e) {
@@ -68,19 +75,62 @@
             }
         });
     }
+
+    public static ExecutorService getCoprocessorPool() {
+        if (coprocessorPool != null) {
+            return coprocessorPool;
+        }
+
+        synchronized (HBaseConnection.class) {
+            if (coprocessorPool != null) {
+                return coprocessorPool;
+            }
+
+            KylinConfig config = KylinConfig.getInstanceFromEnv();
+
+            // copy from HConnectionImplementation.getBatchPool()
+            int maxThreads = config.getHBaseMaxConnectionThreads();
+            int coreThreads = config.getHBaseCoreConnectionThreads();
+            long keepAliveTime = config.getHBaseConnectionThreadPoolAliveSeconds();
+            LinkedBlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(maxThreads * 100);
+            ThreadPoolExecutor tpe = new ThreadPoolExecutor(coreThreads, maxThreads, keepAliveTime, TimeUnit.SECONDS, workQueue, //
+                    Threads.newDaemonThreadFactory("kylin-coproc-"));
+            tpe.allowCoreThreadTimeOut(true);
+
+            logger.info("Creating coprocessor thread pool with max of {}, core of {}", maxThreads, coreThreads);
+
+            coprocessorPool = tpe;
+            return coprocessorPool;
+        }
+    }
+
+    private static void closeCoprocessorPool() {
+        if (coprocessorPool == null)
+            return;
+
+        coprocessorPool.shutdown();
+        try {
+            if (!coprocessorPool.awaitTermination(10, TimeUnit.SECONDS)) {
+                coprocessorPool.shutdownNow();
+            }
+        } catch (InterruptedException e) {
+            coprocessorPool.shutdownNow();
+        }
+    }
+
     
     public static void clearConnCache() {
-        ConnPool.clear();
+        connPool.clear();
     }
 
     private static final ThreadLocal<Configuration> hbaseConfig = new ThreadLocal<>();
 
     public static Configuration getCurrentHBaseConfiguration() {
-        if (hbaseConfig.get() == null) {
+        if (configThreadLocal.get() == null) {
             String storageUrl = KylinConfig.getInstanceFromEnv().getStorageUrl();
-            hbaseConfig.set(newHBaseConfiguration(storageUrl));
+            configThreadLocal.set(newHBaseConfiguration(storageUrl));
         }
-        return hbaseConfig.get();
+        return configThreadLocal.get();
     }
 
     private static Configuration newHBaseConfiguration(String url) {
@@ -128,20 +178,20 @@
     @SuppressWarnings("resource")
     public static Connection get(String url) {
         // find configuration
-        Configuration conf = ConfigCache.get(url);
+        Configuration conf = configCache.get(url);
         if (conf == null) {
             conf = newHBaseConfiguration(url);
-            ConfigCache.put(url, conf);
+            configCache.put(url, conf);
         }
 
-        Connection connection = ConnPool.get(url);
+        Connection connection = connPool.get(url);
         try {
             while (true) {
                 // I don't use DCL since recreate a connection is not a big issue.
                 if (connection == null || connection.isClosed()) {
                     logger.info("connection is null or closed, creating a new one");
                     connection = ConnectionFactory.createConnection(conf);
-                    ConnPool.put(url, connection);
+                    connPool.put(url, connection);
                 }
 
                 if (connection == null || connection.isClosed()) {
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseResourceStore.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseResourceStore.java
index f988dea..aa7a4d4 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseResourceStore.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/HBaseResourceStore.java
@@ -32,14 +32,9 @@
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.TableName;
-import org.apache.hadoop.hbase.client.Delete;
-import org.apache.hadoop.hbase.client.Get;
+import org.apache.hadoop.hbase.client.*;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.Table;
-import org.apache.hadoop.hbase.client.Put;
-import org.apache.hadoop.hbase.client.Result;
-import org.apache.hadoop.hbase.client.ResultScanner;
-import org.apache.hadoop.hbase.client.Scan;
 import org.apache.hadoop.hbase.filter.CompareFilter;
 import org.apache.hadoop.hbase.filter.Filter;
 import org.apache.hadoop.hbase.filter.FilterList;
@@ -286,7 +281,6 @@
 
             Delete del = new Delete(Bytes.toBytes(resPath));
             table.delete(del);
-            table.flushCommits();
 
             if (hdfsResourceExist) { // remove hdfs cell value
                 Path redirectPath = bigCellHDFSPath(resPath);
@@ -308,7 +302,7 @@
     }
 
     private Result getFromHTable(String path, boolean fetchContent, boolean fetchTimestamp) throws IOException {
-        HTableInterface table = getConnection().getTable(getAllInOneTableName());
+        Table table = getConnection().getTable(TableName.valueOf(getAllInOneTableName()));
         try {
             return internalGetFromHTable(table, path, fetchContent, fetchTimestamp);
         } finally {
@@ -316,7 +310,7 @@
         }
     }
 
-    private Result internalGetFromHTable(HTableInterface table, String path, boolean fetchContent, boolean fetchTimestamp) throws IOException {
+    private Result internalGetFromHTable(Table table, String path, boolean fetchContent, boolean fetchTimestamp) throws IOException {
         byte[] rowkey = Bytes.toBytes(path);
 
         Get get = new Get(rowkey);
@@ -330,14 +324,9 @@
                 get.addColumn(B_FAMILY, B_COLUMN_TS);
         }
 
-        Table table = getConnection().getTable(TableName.valueOf(getAllInOneTableName()));
-        try {
-            Result result = table.get(get);
-            boolean exists = result != null && (!result.isEmpty() || (result.getExists() != null && result.getExists()));
-            return exists ? result : null;
-        } finally {
-            IOUtils.closeQuietly(table);
-        }
+        Result result = table.get(get);
+        boolean exists = result != null && (!result.isEmpty() || (result.getExists() != null && result.getExists()));
+        return exists ? result : null;
     }
 
     private Path writeLargeCellToHdfs(String resPath, byte[] largeColumn, Table table) throws IOException {
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/cube/v2/CubeHBaseEndpointRPC.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/cube/v2/CubeHBaseEndpointRPC.java
index 830aca7..d84074f 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/cube/v2/CubeHBaseEndpointRPC.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/cube/v2/CubeHBaseEndpointRPC.java
@@ -360,7 +360,7 @@
                     final boolean[] abnormalFinish = new boolean[1];
 
                     try {
-                        HTableInterface table = conn.get(cubeSeg.getStorageLocationIdentifier(), HBaseConnection.getCoprocessorPool());
+                        Table table = conn.getTable(TableName.valueOf(cubeSeg.getStorageLocationIdentifier()), HBaseConnection.getCoprocessorPool());
 
                         final CubeVisitRequest request = builder.build();
                         final byte[] startKey = epRange.getFirst();
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/HBaseCuboidWriter.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/HBaseCuboidWriter.java
index 16955dd..c990379 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/HBaseCuboidWriter.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/HBaseCuboidWriter.java
@@ -136,7 +136,6 @@
             logger.info("commit total " + puts.size() + " puts, totally cost:" + (System.currentTimeMillis() - t) + "ms");
             puts.clear();
         }
-        logger.info("commit total " + puts.size() + " puts, totally cost:" + (System.currentTimeMillis() - t) + "ms");
         puts.clear();
     }
 
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/CubeMigrationCLI.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/CubeMigrationCLI.java
index 6b63e66..dfb7c78 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/CubeMigrationCLI.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/CubeMigrationCLI.java
@@ -27,16 +27,8 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hbase.Cell;
-import org.apache.hadoop.hbase.CellUtil;
-import org.apache.hadoop.hbase.HTableDescriptor;
-import org.apache.hadoop.hbase.TableName;
-import org.apache.hadoop.hbase.client.Delete;
-import org.apache.hadoop.hbase.client.Get;
-import org.apache.hadoop.hbase.client.HBaseAdmin;
-import org.apache.hadoop.hbase.client.HTableInterface;
-import org.apache.hadoop.hbase.client.Put;
-import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.*;
+import org.apache.hadoop.hbase.client.*;
 import org.apache.kylin.common.KylinConfig;
 import org.apache.kylin.common.persistence.JsonSerializer;
 import org.apache.kylin.common.persistence.RawResource;
@@ -45,7 +37,6 @@
 import org.apache.kylin.common.restclient.Broadcaster;
 import org.apache.kylin.common.restclient.RestClient;
 import org.apache.kylin.common.util.Bytes;
-import org.apache.kylin.common.util.Dictionary;
 import org.apache.kylin.cube.CubeInstance;
 import org.apache.kylin.cube.CubeManager;
 import org.apache.kylin.cube.CubeSegment;
@@ -463,11 +454,7 @@
                             put.addColumn(CellUtil.cloneFamily(cell), CellUtil.cloneQualifier(cell), CellUtil.cloneValue(cell));
                             destAclHtable.put(put);
                         }
-                        Put put = new Put(Bytes.toBytes(cubeId));
-                        put.add(family, column, value);
-                        destAclHtable.put(put);
                     }
-                    destAclHtable.flushCommits();
                 } finally {
                     IOUtils.closeQuietly(srcAclHtable);
                     IOUtils.closeQuietly(destAclHtable);
@@ -533,13 +520,12 @@
         case COPY_ACL: {
             String cubeId = (String) opt.params[0];
             String modelId = (String) opt.params[1];
-            HTableInterface destAclHtable = null;
+            Table destAclHtable = null;
             try {
-                destAclHtable = HBaseConnection.get(dstConfig.getStorageUrl()).getTable(dstConfig.getMetadataUrlPrefix() + ACL_TABLE_NAME);
+                destAclHtable = HBaseConnection.get(dstConfig.getStorageUrl()).getTable(TableName.valueOf(dstConfig.getMetadataUrlPrefix() + ACL_TABLE_NAME));
 
                 destAclHtable.delete(new Delete(Bytes.toBytes(cubeId)));
                 destAclHtable.delete(new Delete(Bytes.toBytes(modelId)));
-                destAclHtable.flushCommits();
             } finally {
                 IOUtils.closeQuietly(destAclHtable);
             }
diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/StorageCleanupJob.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/StorageCleanupJob.java
index d7f49df..874121d 100644
--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/StorageCleanupJob.java
+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/util/StorageCleanupJob.java
@@ -44,6 +44,7 @@
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.util.ToolRunner;
 import org.apache.kylin.common.KylinConfig;
 import org.apache.kylin.common.util.CliCommandExecutor;
@@ -167,10 +168,10 @@
     }
 
     class DeleteHTableRunnable implements Callable {
-        HBaseAdmin hbaseAdmin;
+        Admin hbaseAdmin;
         String htableName;
 
-        DeleteHTableRunnable(HBaseAdmin hbaseAdmin, String htableName) {
+        DeleteHTableRunnable(Admin hbaseAdmin, String htableName) {
             this.hbaseAdmin = hbaseAdmin;
             this.htableName = htableName;
         }