hadoop的classpath设置在哪里

hadoop的classpath设置在哪里

本文介绍了hadoop的classpath设置在哪里的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

hadoop的classpath在哪里设置?
当我运行下面的命令时,它给了我类路径。 classpath设置在哪里?

  

以下是 hadoop-env.sh 中的相关代码,它添加了容量调度程序和aws jar's 。

  export HADOOP_CONF_DIR = $ {HADOOP_CONF_DIR: - / etc / hadoop} 

#Extra Java CLASSPATH元素。自动插入容量调度程序。
for $ HADOOP_HOME / contrib / capacity-scheduler / *。jar;如果[$ HADOOP_CLASSPATH]执行
;然后
export HADOOP_CLASSPATH = $ HADOOP_CLASSPATH:$ f
else
export HADOOP_CLASSPATH = $ f
fi
完成

#...一些其他行省略

#添加Aws jar
export HADOOP_CLASSPATH = $ HADOOP_CLASSPATH:share / hadoop / tools / lib / *


Where is the classpath for hadoop set?When I run the below command it gives me the classpath. Where is the classpath set?

  bin/hadoop classpath

I'm using hadoop 2.6.0

解决方案

As said by almas shaikh it's set in hadoop-config.sh, but you could add more jars to it in hadoop-env.sh

Here is a relevant code from hadoop-env.sh which adds additional jars like capacity-scheduler and aws jar's.

export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/etc/hadoop"}

# Extra Java CLASSPATH elements.  Automatically insert capacity-scheduler.
for f in $HADOOP_HOME/contrib/capacity-scheduler/*.jar; do
  if [ "$HADOOP_CLASSPATH" ]; then
    export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f
  else
    export HADOOP_CLASSPATH=$f
  fi
done

# ... some other lines omitted

# Add Aws jar
export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:share/hadoop/tools/lib/*

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08-24 04:47