摘要

Kettle是一款国外开源的ETL工具，纯java编写，可以在Window、Linux、Unix上运行，绿色无需安装，数据抽取高效稳定。是kettle中用于访问bigdata，包括hadoop、cassandra、mongodb等nosql数据库的一个插件。

截至目前，kettle的版本为4.4.1，big-data-plugin插件支持cloudera CDH3u4、CDH4.1，暂不支持Intel的hadoop发行版本IDH。

本文主要介绍如何让kettle支持IDH的hadoop版本。

方法

假设你已经安装好IDH-2.3的集群，并已经拷贝出/usr/lib/下的hadoop、hbase、zookeeper目录。

首先，下载一个kettle版本，如社区版data-integration，然后进入data-integration/plugins/pentaho-big-data-plugin目录，修改plugin.properties文件中的active.hadoop.configuration属性，将其值改为cdh4

active.hadoop.configuration=cdh4

修改kettle的log4j日志等级，并启动kettle，检查启动过程中是否报错，如有错误，请修正错误。

进入hadoop-configurations目录，copy and paste cdh3u4并命名为idh2.3。

因为IDH和CDH的hadoop版本不一致，故需要替换hadoop和hbase、zookeeper为IDH的版本，涉及到需要替换、增加的jar有，这些jar文件从IDH安装后的目录中拷贝即可：

data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/pmr/hbase-0.94.1-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/pmr/protobuf-java-2.4.0a.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/pmr/zookeeper-3.4.5-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-ant-1.0.3-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-core-1.0.3-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-examples-1.0.3-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-test-1.0.3-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-tools-1.0.3-Intel.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/libthrift-0.8.0.jar

其他依赖包可以尝试添加，并删除多版本的jar文件。

需要删除CDH的jar有：

data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/pmr/hbase-0.90.6-cdh3u4.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/pmr/zookeeper-3.3.5-cdh3u4.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-client-0.20.2-cdh3u4.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/client/hadoop-core-0.20.2-cdh3u4.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/libfb303-0.5.0-cdh.jardata-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/idh2.3/lib/libthrift-0.5.0-cdh.jar

修改plugin.properties文件中的active.hadoop.configuration属性，将其值改为idh2.3。重起kettle，观察启动过程中是否报错。

验证

打开hbase output组件，配置zookeeper的host和port

hbase-output-setup-for-idh-2.3

在Create/Edit mappings tab页点击Get table names，发现该组件卡住，kettle控制台提示异常则需要检查客户端jar版本和服务端是否一致：

INFO client.HConnectionManager$HConnectionImplementation: getMaster attempt 0 of 10 failed; retrying after sleep of 1000java.io.IOException: Call to OS-GZP2308-04/192.168.40.84:60000 failed on local exception: java.io.EOFExceptionat org.apache.hadoop.hbase.ipc.HBaseClient.wrapException(HBaseClient.java:1110)at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:1079)at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)at $Proxy5.getProtocolVersion(Unknown Source)at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:183)at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:335)at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:312)at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:364)at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getMaster(HConnectionManager.java:710)at org.apache.hadoop.hbase.client.HBaseAdmin.< init>(HBaseAdmin.java:141)at com.intel.hbase.test.createtable.TableBuilder.main(TableBuilder.java:48)Caused by: java.io.EOFExceptionat java.io.DataInputStream.readInt(DataInputStream.java:375)at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:605)at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:538)