entaho Kettle 连接 CDH Hive

最新推荐文章于 2023-06-26 11:06:28 发布

转载最新推荐文章于 2023-06-26 11:06:28 发布 · 451 阅读

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原文链接：https://blog.youkuaiyun.com/rav009/art ... 439?utm_source=copy

本文详细介绍了如何解决Kettle在调用Hadoop组件时遇到的常见问题，包括清理缓存、配置shim、拷贝必要的Hadoop配置文件和jar包至Kettle，以及修改Kitchen.sh脚本以避免重复错误。

关键点:
清理Kettle缓存:

rm -rf /home/user/data-integration/./system/karaf/caches
rm -rf /home/user/data-integration/./system/karaf/data

配置Kettle big data setting:在 Kettle安装目录/data-integration/plugins/pentaho-big-data-plugin/plugin.properties 中找到配置项
active.hadoop.configuration=cdh513
这里的"cdh513"就是 Kettle安装目录/data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations 下的子目录名字, 又称shim, 它相当于hadoop不同版本的驱动
默认有4个shim, 分别对应hadoop的4个发行版, 用哪个就在上述的plugin.properties里配置好
配置shim的Hadoop setting文件:
Kettle安装目录/data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/cdh513/下6个xml文件, 如core-site.xml, hbase-site.xml, hdfs-site.xml, yarn-site.xml, hive-site.xml, mapred-site.xml
或者直接从集群那里拷贝覆盖.(CDP各组件配置文件路径: Hadoop: /etc/hadoop/conf, hbase: /etc/hbase/conf, hive: /etc/hive/conf)

拷贝jar包:运行kitchen或pan的时候如果报错: no suitable driver found for jdbc:hive2
可以复制一遍jar包到kettle的lib目录下以及 active shim的lib目录下
CDH的Hive在 /opt/cloudera/parcels/CDH/lib/hive
可以把/opt/cloudera/parcels/CDH/lib/hive/lib下所有hive开头的jar包复制到 Kettle安装目录/data-integration/lib 和 Kettle安装目录/data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/cdh513/lib
例如(这里假设kettle安装在/opt下, 且当前生效的shim叫cdh513)

cp /opt/cloudera/parcels/CDH/lib/hive/lib/hive*.jar /opt/data-integration/plugins/pentaho-big-data-plugin/hadoop-configurations/cdh513/lib
cp /opt/cloudera/parcels/CDH/lib/hive/lib/hive*.jar /opt/data-integration/lib

然后再清理一遍kettle的缓存, 否则Kettle可能会不识别刚才拷贝的jar文件:

rm -rf /home/fr-renjie.wei/data-integration/./system/karaf/caches
rm -rf /home/fr-renjie.wei/data-integration/./system/karaf/data

No suitable driver found for jdbc:hive2似乎linux上的Kettle本身在调用Hive jar包的过程中有什么bug, 这个问题经常出现, 网上也有很多人问到这个bug.
我遇到情况是, Kitchen调用job会报这个错, pan不会报错.
我的解决办法:

清理一次缓存(rm -rf /home/user/data-integration/./system/karaf/caches)
运行kitchen

还有一个一劳永逸的办法, 直接改Kitchen.sh, 加上rm这句

#!/bin/sh
# *****************************************************************************
#
# Pentaho Data Integration
#
#
# *****************************************************************************
#
# Licensed 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.
#
# *****************************************************************************
INITIALDIR="`pwd`"
BASEDIR="`dirname $0`"
cd "$BASEDIR"
DIR="`pwd`"
cd - > /dev/null
rm -rf $BASEDIR/./system/karaf/caches #add this!
if [ "$1" = "-x" ]; then
set LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$BASEDIR/lib
export LD_LIBRARY_PATH
export OPT="-Xruntracer $OPT"
shift
fi
export IS_KITCHEN="true"
"$DIR/spoon.sh" -main org.pentaho.di.kitchen.Kitchen -initialDir "$INITIALDIR/" "$@"

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