Kylin修改默认hbase namespace命名空间default的解决方案

问题及背景：同一用户的三家公司的物理集群合并，合并后用dataspace+kerberos控制不同公司对集群资料的访问权限，三家公司分别使用独立的kerberos票据访问，特定的namespace,而生产环境部署的kylin-2.0/2.1只能保存cuboid到hbase 的 default namespace。

解决的过程及方案：
1、经多方查找发现， Kylin源码github项目，最新的master分支已经支持更改存储的hbase的默认namespace，但是官方对外发布的最新安装包才更新到Kylin-2.1版本，且最新源码并没有经过生产的验证，不敢冒然部署，于是想办法在现有的版本上重新编译源码、打包。
2、经多方搜索确认更改hbase namespace的commit是kylin-2846，于是查找相关实现的细节。

解决思路：
1、首先按照github上提供的修改方法更改了https://github.com/apache/kylin/commit/ffcbdb7f4288fa6011f018163bdce9602415cf10
中的五个类，重新编译打包，执行到convert cuboid Data to HFile这一步的时候抛出异常，找不到Hbase表

org.apache.hadoop.hbase.TableNotFoundException:ISW:KYLIN_F3KD3ZC1LU at org.apache.hadoop.hbase.client.HBaseAdmin.getTableDescriptor(HBaseAdmin.java:575)

而这时，我在hbase shell指定的namespace查看，已经生成了hbase表，为什么会找不到呢？继续查找原因
2、继续找Kylin-2846相关的内容，发现有人遇到同样的问题，地址：https://issues.apache.org/jira/browse/KYLIN-2846
原来github上给出的代码少了很关键的一步：

--- .../main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java    | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.javaindex 9f9b382..7a583ca 100644--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java@@ -92,7 +92,7 @@ public class CubeHFileJob extends AbstractHadoopJob {             attachCubeMetadata(cube, job.getConfiguration());             Configuration hbaseConf = HBaseConfiguration.create(getConf());-            HTable htable = new HTable(hbaseConf, getOptionValue(OPTION_HTABLE_NAME).toUpperCase());+            HTable htable = new HTable(hbaseConf, getOptionValue(OPTION_HTABLE_NAME));             // Automatic config !             HFileOutputFormat.configureIncrementalLoad(job, htable);-- 1.9.1

具体的修改步骤如下：From 004e1bcb983442a1a2c69f7d1d6c09dc29d4301e Mon Sep 17 00:00:00 2001From: Liu Shaohui <[e-mail]>Date: Tue, 5 Sep 2017 15:50:29 +0800Subject: [PATCH] Add a config of hbase namespace for cube storage--- .../src/main/java/org/apache/kylin/common/KylinConfigBase.java        | 4 ++++ core-common/src/main/resources/kylin-defaults.properties              | 3 +++ core-cube/src/main/java/org/apache/kylin/cube/CubeManager.java        | 2 ++ .../main/java/org/apache/kylin/storage/hbase/steps/BulkLoadJob.java   | 2 +- .../main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java  | 2 +- 5 files changed, 11 insertions(+), 2 deletions(-)diff --git a/core-common/src/main/java/org/apache/kylin/common/KylinConfigBase.java b/core-common/src/main/java/org/apache/kylin/common/KylinConfigBase.javaindex 749b515..3f53023 100644--- a/core-common/src/main/java/org/apache/kylin/common/KylinConfigBase.java+++ b/core-common/src/main/java/org/apache/kylin/common/KylinConfigBase.java@@ -712,6 +712,10 @@ abstract public class KylinConfigBase implements Serializable {         return StorageURL.valueOf(url);     }+    public String getHBaseStorageNameSpace() {+        return getOptional("kylin.storage.hbase.namespace", "default");+    }+     public String getHBaseClusterFs() {         return getOptional("kylin.storage.hbase.cluster-fs", "");     }diff --git a/core-common/src/main/resources/kylin-defaults.properties b/core-common/src/main/resources/kylin-defaults.propertiesindex a3277ce..34fb5a0 100644--- a/core-common/src/main/resources/kylin-defaults.properties+++ b/core-common/src/main/resources/kylin-defaults.properties@@ -65,6 +65,9 @@ kylin.source.hive.redistribute-flat-table=true # The storage for final cube file in hbase kylin.storage.url=hbase+# The namespace for hbase storage+kylin.storage.hbase.namespace=default+ # Compression codec for htable, valid value [none, snappy, lzo, gzip, lz4] kylin.storage.hbase.compression-codec=nonediff --git a/core-cube/src/main/java/org/apache/kylin/cube/CubeManager.java b/core-cube/src/main/java/org/apache/kylin/cube/CubeManager.javaindex 043993c..484b977 100644--- a/core-cube/src/main/java/org/apache/kylin/cube/CubeManager.java+++ b/core-cube/src/main/java/org/apache/kylin/cube/CubeManager.java@@ -684,11 +684,13 @@ public class CubeManager implements IRealizationProvider {     }     private String generateStorageLocation() {+        String namespace = config.getHBaseStorageNameSpace();         String namePrefix = IRealizationConstants.CubeHbaseStorageLocationPrefix;         String tableName = "";         Random ran = new Random();         do {             StringBuffer sb = new StringBuffer();+            sb.append(namespace).append(":");             sb.append(namePrefix);             for (int i = 0; i < HBASE_TABLE_LENGTH; i++) {                 sb.append(ALPHA_NUM.charAt(ran.nextInt(ALPHA_NUM.length())));diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/BulkLoadJob.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/BulkLoadJob.javaindex 30616c5..d1caccb 100644--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/BulkLoadJob.java+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/BulkLoadJob.java@@ -47,7 +47,7 @@ public class BulkLoadJob extends AbstractHadoopJob {         options.addOption(OPTION_CUBE_NAME);         parseOptions(options, args);-        String tableName = getOptionValue(OPTION_HTABLE_NAME).toUpperCase();+        String tableName = getOptionValue(OPTION_HTABLE_NAME);         // e.g         // /tmp/kylin-3f150b00-3332-41ca-9d3d-652f67f044d7/test_kylin_cube_with_slr_ready_2_segments/hfile/         // end with "/"diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.javaindex 1a624c4..9f9b382 100644--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java@@ -68,7 +68,7 @@ public class CubeHFileJob extends AbstractHadoopJob {             Path partitionFilePath = new Path(getOptionValue(OPTION_PARTITION_FILE_PATH));             Path output = new Path(getOptionValue(OPTION_OUTPUT_PATH));-            String cubeName = getOptionValue(OPTION_CUBE_NAME).toUpperCase();+            String cubeName = getOptionValue(OPTION_CUBE_NAME);             CubeManager cubeMgr = CubeManager.getInstance(KylinConfig.getInstanceFromEnv());-- 1.9.1

2、、、From 677400ee7b4cf5be0ddc9b595d80e02a0ba87c12 Mon Sep 17 00:00:00 2001From: Liu Shaohui <[e-mail]>Date: Fri, 15 Sep 2017 14:34:18 +0800Subject: [PATCH] Addium for KYLIN-2846--- .../main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java    | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.javaindex 9f9b382..7a583ca 100644--- a/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java+++ b/storage-hbase/src/main/java/org/apache/kylin/storage/hbase/steps/CubeHFileJob.java@@ -92,7 +92,7 @@ public class CubeHFileJob extends AbstractHadoopJob {             attachCubeMetadata(cube, job.getConfiguration());             Configuration hbaseConf = HBaseConfiguration.create(getConf());-            HTable htable = new HTable(hbaseConf, getOptionValue(OPTION_HTABLE_NAME).toUpperCase());+            HTable htable = new HTable(hbaseConf, getOptionValue(OPTION_HTABLE_NAME));             // Automatic config !             HFileOutputFormat.configureIncrementalLoad(job, htable);-- 1.9.1

3、clean htablediff --git a/server-base/src/main/java/org/apache/kylin/rest/job/StorageCleanJobHbaseUtil.java b/server-base/src/main/java/org/apache/kylin/rest/job/StorageCleanJobHbaseUtil.javaindex 3728ea1..2d95542 100644--- a/server-base/src/main/java/org/apache/kylin/rest/job/StorageCleanJobHbaseUtil.java+++ b/server-base/src/main/java/org/apache/kylin/rest/job/StorageCleanJobHbaseUtil.java@@ -46,15 +46,28 @@ public class StorageCleanJobHbaseUtil {     public static void cleanUnusedHBaseTables(boolean delete, int deleteTimeout) throws IOException {         Configuration conf = HBaseConfiguration.create();-        CubeManager cubeMgr = CubeManager.getInstance(KylinConfig.getInstanceFromEnv());+        KylinConfig config = KylinConfig.getInstanceFromEnv();+        CubeManager cubeMgr = CubeManager.getInstance(config);         // get all kylin hbase tables         try (HBaseAdmin hbaseAdmin = new HBaseAdmin(conf)) {-            String tableNamePrefix = IRealizationConstants.SharedHbaseStorageLocationPrefix;+            String namespace = config.getHBaseStorageNameSpace();+            StringBuffer sb = new StringBuffer();+            String tableNamePrefix = null;+            if(namespace.equals("default") || namespace.equals("")){+                tableNamePrefix = IRealizationConstants.SharedHbaseStorageLocationPrefix;+            }else{+                sb.append(config.getHBaseStorageNameSpace()).append(":");+                sb.append(IRealizationConstants.SharedHbaseStorageLocationPrefix);+                tableNamePrefix = sb.toString();+            }+             HTableDescriptor[] tableDescriptors = hbaseAdmin.listTables(tableNamePrefix + ".*");+             List<String> allTablesNeedToBeDropped = new ArrayList<String>();             for (HTableDescriptor desc : tableDescriptors) {+                 String host = desc.getValue(IRealizationConstants.HTableTag);-                if (KylinConfig.getInstanceFromEnv().getMetadataUrlPrefix().equalsIgnoreCase(host)) {+                if (config.getMetadataUrlPrefix().equalsIgnoreCase(host)) {                     //only take care htables that belongs to self, and created more than 2 days                     allTablesNeedToBeDropped.add(desc.getTableName().getNameAsString());                 }

修改完后，core-common, core-cure, storage-hbase三个目录重新打jar包，覆盖原Kylin安装目录KYLIN_HOME/tomcat/webapps/kylin.war下对应的jar包，重启Kylin，问题解决。