Aah ok. Got it to work. Thanks.
Amandeep Khurana Computer Science Graduate Student University of California, Santa Cruz On Sun, Feb 1, 2009 at 10:56 PM, lohit <[email protected]> wrote: > from 0.19, package structure was changed. > DistributedFileSystem is no longer in org.apache.hadoop.dfs , it has been > renamed to org.apache.hadoop.hdfs. > > Check your sample config file in 0.19 branch conf/hadoop-default.xml, in > particular for > <property> > <name>fs.hdfs.impl</name> > <value>org.apache.hadoop.hdfs.DistributedFileSystem</value> > <description>The FileSystem for hdfs: uris.</description> > </property> > > > Thanks, > Lohit > > > > ----- Original Message ---- > From: Amandeep Khurana <[email protected]> > To: [email protected] > Sent: Sunday, February 1, 2009 10:19:56 PM > Subject: Setting up version 0.19.0 > > I was using 0.18.2 till and needed to upgrade to 0.19.0 for the JDBC > support. Strangely, I'm unable to get 0.19.0 to start up using exactly the > same configuration as the earlier version. Here's the error from the > namenode log file: > > 2009-02-01 22:16:13,775 ERROR > org.apache.hadoop.hdfs.server.namenode.NameNode: > java.lang.RuntimeException: > java.lang.ClassNotFoundException: > org.apache.hadoop.dfs.DistributedFileSystem > at > org.apache.hadoop.conf.Configuration.getClass(Configuration.java:720) > at > org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1362) > at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:56) > at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1379) > at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:215) > at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:120) > at org.apache.hadoop.fs.Trash.<init>(Trash.java:62) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:166) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:208) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:194) > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:859) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:868) > Caused by: java.lang.ClassNotFoundException: > org.apache.hadoop.dfs.DistributedFileSystem > at java.net.URLClassLoader$1.run(Unknown Source) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) > at java.lang.ClassLoader.loadClass(Unknown Source) > at java.lang.ClassLoader.loadClassInternal(Unknown Source) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Unknown Source) > at > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:673) > at > org.apache.hadoop.conf.Configuration.getClass(Configuration.java:718) > ... 11 more > > Does anyone have any idea about this? > > Amandeep > > > Amandeep Khurana > Computer Science Graduate Student > University of California, Santa Cruz > >
