Hi, Seems that you need to add your hostname/IP pair in /etc/hosts in both nodes. Also it looks that you need to setup your configuration files correctly.
This guides can be helpful for you: http://hadoop.apache.org/common/docs/r0.20.2/quickstart.html http://hadoop.apache.org/common/docs/r0.20.2/cluster_setup.html cheers, esteban. On Tue, Jan 4, 2011 at 02:38, haiyan <ultramatrixs...@gmail.com> wrote: > I have two nodes as Hadoop test. When I set fs.default.name to > hdfs://hostname:54310/ in core-site.xml and mapred.job.tracker to > hdfs://hostname:54311 in mapred-site.xml, > I received the following error information while I started it by > start-all.sh. > > org.apache.hadoop.ipc.RemoteException: java.io.IOException: File > /home/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to > 0 > nodes, instead of 1 > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > ... > Then I had to change hdfs://hostname:54310/ to hdfs://ipAddress:54310/ and > hdfs://hostname:54311 to hdfs://ipAddress:54311, it's ok while I started it > by start-all.sh. > However, when I run wordcount example, I got the following error message. > > java.lang.IllegalArgumentException: Wrong FS: > > hdfs://ipAddress:54310/home/hadoop/tmp/mapred/system/job_201101041628_0005/job.xml, > expected: hdfs://hostname:54310 > at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:310) > at > > org.apache.hadoop.hdfs.DistributedFileSystem.checkPath(DistributedFileSystem.java:99) > at > > org.apache.hadoop.hdfs.DistributedFileSystem.getPathName(DistributedFileSystem.java:155) > at > > org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:453) > at > org.apache.hadoop.mapred.TaskTracker.localizeJob(TaskTracker.java:745) > at > org.apache.hadoop.mapred.TaskTracker.startNewTask(TaskTracker.java:1664) > at > org.apache.hadoop.mapred.TaskTracker.access$1200(TaskTracker.java:97) > at > > org.apache.hadoop.mapred.TaskTracker$TaskLauncher.run(TaskTracker.java:1629) > > From message above, it seems the hdfs://hostname:port is not suitable for > example run? What should I do ? > > Note: ipAddress means ip address I used, hostname means host name I used >
