hadoop for raspberry pi

◻️./hdfs dfsadmin -reportを実行するとjava関連のエラーが出てしまうので

対策を探ってみた。

****error内容******

Java HotSpot(TM) Client VM warning: You have loaded library /opt/hadoop/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.

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$ vi ~/.bashrc

◻️以下、修正を行う

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# -- HADOOP ENVIRONMENT VARIABLES START -- #

export HADOOP_HOME=/opt/hadoop/

export PATH=$PATH:$HADOOP_HOME/bin

export PATH=$PATH:$HADOOP_HOME/sbin

export HADOOP_MAPRED_HOME=$HADOOP_HOME

export HADOOP_COMMON_HOME=$HADOOP_HOME

export HADOOP_HDFS_HOME=$HADOOP_HOME

export YARN_HOME=$HADOOP_HOME

# -- HADOOP ENVIRONMENT VARIABLES END -- #

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

export JAVA_HOME=/usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre

export PATH=$PATH:$JAVA_HOME/bin

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◻️以下、認証鍵を再設定してみる。

$ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys