hadoop要实现远程调试需要在配置文件添加参数

【1】添加参数,$HADOOP_HOME/etc/hadoop/hadoop-env.sh文件

#远程调试namenode
export HADOOP_NAMENODE_OPTS="-agentlib:jdwp=transport=dt_socket,address=8888,server=y,suspend=y"
#远程调试datanode
export HADOOP_DATANODE_OPTS="-agentlib:jdwp=transport=dt_socket,address=9888,server=y,suspend=y"

#远程调试RM
export YARN_RESOURCEMANAGER_OPTS="-agentlib:jdwp=transport=dt_socket,address=10888,server=y,suspend=y"

#远程调试NM
export YARN_NODEMANAGER_OPTS="-agentlib:jdwp=transport=dt_socket,address=10888,server=y,suspend=y"

【2】启动hadoop

start-all.sh

监听.png

【3】调试namenode

步骤：
ctrl + shift + t > 输入namenode > 选择对应的jar  > 搜索main方法  >  main方法打断点  >  
右击main > debug as  > debug config  >  Remote Java Application >  配置host，配置Port  >  debug

图例：

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