hadoop - mapred-site.xml中$ PWD的含义

Question

我需要帮助来了解mapred-site.xml上的以下配置。

<property>
      <name>mapreduce.application.classpath</name>
      <value>$PWD/mr-framework/hadoop/share/hadoop/mapreduce/*:$PWD/mr-framework/hadoop/share/hadoop/mapreduce/lib/*:$PWD/mr-framework/hadoop/share/hadoop/common/*:$PWD/mr-framework/hadoop/share/hadoop/common/lib/*:$PWD/mr-framework/hadoop/share/hadoop/yarn/*:$PWD/mr-framework/hadoop/share/hadoop/yarn/lib/*:$PWD/mr-framework/hadoop/share/hadoop/hdfs/*:$PWD/mr-framework/hadoop/share/hadoop/hdfs/lib/*:$PWD/mr-framework/hadoop/share/hadoop/tools/lib/*:/usr/hdp/${hdp.version}/hadoop/lib/hadoop-lzo-0.6.0.${hdp.version}.jar:/etc/hadoop/conf/secure</value>
    </property>

$ PWD(类似于Linux的普通pwd)和$ hdp.version的值是多少？这些值设置在哪里？

任何的想法？

Answer 1

$ PWD是当前工作目录的路径名，而$ hdp.version是您正在使用的Hortonworks Data Platform(HDP)的版本。它们设置在您的~/.bashrc或/etc/environment或~/.profile中