141.7.1. hadoop-1.1.2-1.x86_64.rpm 包含哪些文件内容
查看安装文件
# rpm -ql hadoop-1.1.2-1
141.7.2. 启动 Hadoop 后 9000 端口不存在
首先通过 jps 排查 NameNode 是否存在
[hadoop@netkiller apache-hadoop]$ jps
23345 NodeManager
23042 SecondaryNameNode
11076 Jps
22860 DataNode
23228 ResourceManager
检查 hdfs 目录
[hadoop@netkiller ~]$ find /opt/hadoop/volume/
/opt/hadoop/volume/
/opt/hadoop/volume/datanode
/opt/hadoop/volume/namenode
故障是 hdfs 目录没有初始化，初始化 hdfs 后重启 hadoop 即可解决
[hadoop@netkiller apache-hadoop]$ bin/hdfs namenode -format
[hadoop@netkiller apache-hadoop]$ find /opt/hadoop/volume/
/opt/hadoop/volume/
/opt/hadoop/volume/datanode
/opt/hadoop/volume/namenode
/opt/hadoop/volume/namenode/current
/opt/hadoop/volume/namenode/current/seen_txid
/opt/hadoop/volume/namenode/current/fsimage_0000000000000000000
/opt/hadoop/volume/namenode/current/VERSION
/opt/hadoop/volume/namenode/current/fsimage_0000000000000000000.md5
[hadoop@netkiller ~]$ /srv/apache-hadoop/sbin/stop-all.sh
[hadoop@netkiller ~]$ /srv/apache-hadoop/sbin/start-all.sh
[hadoop@netkiller ~]$ jps
13728 NameNode
13875 DataNode
14308 ResourceManager
14776 Jps
14105 SecondaryNameNode
14425 NodeManager
故障处理完毕
原文出处：Netkiller 系列 手札
本文作者：陈景峯
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