Thanks and it works! I wonder where can we find all the settings. I check the code for hdfs-default.xml but it doesn't have the settings you mentioned. Brendan
---------------------------------------- > From: donta...@gmail.com > Date: Tue, 22 May 2012 13:03:17 +0530 > Subject: Re: namenode directory disappear after machines restart > To: hdfs-user@hadoop.apache.org > > Hello Brendan, > > Do as suggested by Marcos..If you do not set these properties, > Hadoop uses "tmp" directory by default..Apart from setting these > properties in your hdfs-site.xml file add the following property in > your core-site.xml file - > > <property> > <name>hadoop.tmp.dir</name> > <value>some_permanent_path</value> > </property> > > Regards, > Mohammad Tariq > > > On Tue, May 22, 2012 at 10:54 AM, Marcos Ortiz <mlor...@uci.cu> wrote: > > 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 > >> http://www.facebook.com/universidad.uci > >> http://www.flickr.com/photos/universidad_uci > > > > > > -- > > Marcos Luis Ortíz 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
