This is an usual behavior on Unix/Linux systems. When you restart the
system, the content of the /tmp directory is cleaned, because precisely,
the purpose of this directory is to keep files temporally.
For that reason, the data directory for the HDFS filesystem should be
another directory, /var/hadoop/data for example, of course, a directory
durable in time.
So, you should change your dfs.name.dir and your dfs.data.dir variable
in your hdfs-site.xml.
Regards
On 05/21/2012 11:21 PM, Brendan cheng wrote:
Hi,
I'm not sure if there is a setting to avoid the Namenode removed after hosting
machine of Namenode restart.I found that after successfully installed single
node pseudo distributed hadoop following from your website, the name node dir
/tmp/hadoop-brendan/dfs/name are removed if machine reboot.
What do I miss?
Brendan
2012-05-22 11:14:05,678 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory
/tmp/hadoop-brendan/dfs/name does not exist.2012-05-22 11:14:05,680 ERROR
org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization
failed.org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory
/tmp/hadoop-brendan/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:303) at
org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:100) at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:388) at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:362) at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:276) at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:496) at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1279) at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1288)2012-05-22 11:14:05,685 ERROR
org.apache.hadoop.hdfs.server.namenode.NameNode:
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory
/tmp/hadoop-brendan/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:303)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:100) at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:388) at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:362) at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:276) at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:496) at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1279) at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1288)
10mo. ANIVERSARIO DE LA CREACION DE LA UNIVERSIDAD DE LAS CIENCIAS
INFORMATICAS...
CONECTADOS AL FUTURO, CONECTADOS A LA REVOLUCION
http://www.uci.cu
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--
Marcos Luis OrtÃz Valmaseda
Data Engineer&& Sr. System Administrator at UCI
http://marcosluis2186.posterous.com
http://www.linkedin.com/in/marcosluis2186
Twitter: @marcosluis2186
10mo. ANIVERSARIO DE LA CREACION DE LA UNIVERSIDAD DE LAS CIENCIAS
INFORMATICAS...
CONECTADOS AL FUTURO, CONECTADOS A LA REVOLUCION
http://www.uci.cu
http://www.facebook.com/universidad.uci
http://www.flickr.com/photos/universidad_uci
