If use change the hostname, you must change /etc/hosts and /etc/sysconfig/network
for example: -bash-3.00$ more /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost 192.168.102.205 hadoop205.test.com -bash-3.00$ more /etc/sysconfig/network NETWORKING=yes HOSTNAME=hadoop205.test.com If you want to resolve other hosts, you must add the ip address and hostname pair, for example: -bash-3.00$ more /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost 192.168.102.205 hadoop205.test.com 192.168.102.206 slave.test.com David Wei 写道: > Dear all, > > I had configured all the nodes(master/slaves) with the correct hostname > and all the slaves can be reached with hostname from master, and vice versa. > > But in my hadoop-site.xml file, if I configure master's > "fs.default.name" and "mapred.job.tracker" with hostname, e.g. > datacenter5:9000 and datacenter5:9001. All the slaves will not be able > to connect to master: > > ************************************************************/ > 9 2008-10-17 14:58:10,940 INFO org.apache.hadoop.ipc.Client: Retrying > connect to server: datacenter5/192.168.52.129:9000. Already tried 0 time(s). > 10 2008-10-17 14:58:11,943 INFO org.apache.hadoop.ipc.Client: Retrying > connect to server: datacenter5/192.168.52.129:9000. Already tried 1 time(s). > > If changed the settings with IP, e.g. 192.168.52.129. All the slaves > could be mounted, but when you try to run something, you will get > following exceptions: > FAILED > Error initializing attempt_200810170708_0003_m_000000_0: > java.lang.IllegalArgumentException: Wrong FS: > hdfs://192.168.52.129:9000/tmp/hadoop-root/mapred/system/job_200810170708_0003/job.xml, > expected: hdfs://datacenter5:9000 > > Does anybody can help? > > Thx! > > David > > >
