Hi Richard - First thing that comes to mind is a permissions issue. Can you verify that your directories along the desired namenode path are writable by the appropriate user(s)?
HTH, -James On Wed, Dec 8, 2010 at 1:37 PM, Richard Zhang <[email protected]>wrote: > Hi Guys: > I am just installation the hadoop 0.21.0 in a single node cluster. > I encounter the following error when I run bin/hadoop namenode -format > > 10/12/08 16:27:22 ERROR namenode.NameNode: > java.io.IOException: Cannot create directory > /your/path/to/hadoop/tmp/dir/hadoop-hadoop/dfs/name/current > at > > org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:312) > at > org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1425) > at > org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1444) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1242) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1348) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1368) > > > Below is my core-site.xml > > <configuration> > <!-- In: conf/core-site.xml --> > <property> > <name>hadoop.tmp.dir</name> > <value>/your/path/to/hadoop/tmp/dir/hadoop-${user.name}</value> > <description>A base for other temporary directories.</description> > </property> > > <property> > <name>fs.default.name</name> > <value>hdfs://localhost:54310</value> > <description>The name of the default file system. A URI whose > scheme and authority determine the FileSystem implementation. The > uri's scheme determines the config property (fs.SCHEME.impl) naming > the FileSystem implementation class. The uri's authority is used to > determine the host, port, etc. for a filesystem.</description> > </property> > </configuration> > > > Below is my hdfs-site.xml > *<?xml version="1.0"?> > <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> > > <!-- Put site-specific property overrides in this file. --> > > <configuration> > <!-- In: conf/hdfs-site.xml --> > <property> > <name>dfs.replication</name> > <value>1</value> > <description>Default block replication. > The actual number of replications can be specified when the file is > created. > The default is used if replication is not specified in create time. > </description> > </property> > > </configuration> > > > below is my mapred-site.xml: > <?xml version="1.0"?> > <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> > > <!-- Put site-specific property overrides in this file. --> > > <configuration> > > <!-- In: conf/mapred-site.xml --> > <property> > <name>mapred.job.tracker</name> > <value>localhost:54311</value> > <description>The host and port that the MapReduce job tracker runs > at. If "local", then jobs are run in-process as a single map > and reduce task. > </description> > </property> > > </configuration> > > > Thanks. > Richard > * >
