Hadoop 在关机重启后，namenode启动报错

Hadoop 在关机重启后，namenode启动报错：

2011-10-21 05:22:20,504 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /tmp/hadoop-fzuir/dfs/name does not exist.  

2011-10-21 05:22:20,506 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed.  

org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-fzuir/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.  

at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291)  

at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97)  

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379)  

at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353)  

at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254)  

at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434)  

at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153)  

at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162)  

这个以开始的解决方法是将namenode重新再format下，但是后面想想不对，这样每次都format，那不是玩完了~~

然后就搜了下，发现是因为临时文件/tmp会被删除掉，解决方法就是修改core-site.xml，添加hadoop.tmp.dir属性：

<property>  

    <name>hadoop.tmp.dir</name>  

    <value>/home/fzuir/Hadoop0.20.203.0/tmp/hadoop-${user.name}</value>  

</property>  
问题解决了，重启电脑后，再去启动hadoop就不会出现/dfs/name is in an inconsistent state的错误了~~

转自：http://www.linuxidc.com/Linux/2012-02/55079.htm