[Hadoop] 9. Hadoop FailOver 테스트, Hadoop 종료

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1) < master > Namenode 상태 확인

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hdfs haadmin -getServiceState namenode1 
hdfs haadmin -getServiceState namenode2

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2) < master > NameNode 죽이기

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# jps 프로세스 확인
jps # 2672 NameNode

# NameNode 프로세스 kill
kill -9 2672 # kill -9 "NameNode 프로세스 번호"

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3) NameNode 상태 확인

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# NameNode1 상태 확인
hdfs haadmin -getServiceState namenode1 # error
# NameNode2 상태 확인
hdfs haadmin -getServiceState namenode2 # active

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4) Worker1에서 예제 테스트

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• 𝝿 구하기

yarn jar  $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.0.jar pi 16 1000

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5) Yarn, Zookeeper, Hadoop 중단

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# master에서 실행
# Jobhistory stop
mapred --daemon stop historyserver

# master, worker1, worker2에서 실행
# Zookeeper stop
/usr/local/zookeeper/bin/zkServer.sh stop

# master에서 실행
# Hadoop stop
$HADOOP_HOME/sbin/stop-all.sh

• 확인
  

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