Is namenode running when you tried this operation? If so shutdown the namenode process and try it again.
On 3/23/10 11:19 AM, "Gary Yang" <[email protected]> wrote: Hi All, I got exception below. I followed the Quick Start for the Pseudo-Distributed Operation. I did what the quick start says. Can someone help? cat conf/core-site.xml <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> </configuration> cat conf/hdfs-site.xml <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>dfs.replication</name> <value>1</value> </property> </configuration> cat conf/mapred-site.xml <?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>mapred.job.tracker</name> <value>localhost:9001</value> </property> </configuration> Below are errors: -bash-3.2# bin/hadoop namenode -format 10/03/23 11:54:54 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = Board2/192.168.0.185 STARTUP_MSG: args = [-format] STARTUP_MSG: version = 0.20.2 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010 ************************************************************/ 10/03/23 11:54:56 INFO namenode.FSNamesystem: fsOwner=root,root,bin,daemon,sys,adm,disk,wheel 10/03/23 11:54:56 INFO namenode.FSNamesystem: supergroup=supergroup 10/03/23 11:54:56 INFO namenode.FSNamesystem: isPermissionEnabled=true 10/03/23 11:54:56 INFO common.Storage: java.io.IOException: Invalid argument at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:900) at java.nio.channels.FileChannel.tryLock(FileChannel.java:974) at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:527) at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:505) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1087) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) 10/03/23 11:54:56 ERROR namenode.NameNode: java.io.IOException: Invalid argument at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:900) at java.nio.channels.FileChannel.tryLock(FileChannel.java:974) at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:527) at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:505) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1087) at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) 10/03/23 11:54:56 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at Board2/192.168.0.185 ************************************************************/ Thanks, Gary
