Hi list, I've created my hadoop cluster following the tutorial on http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_(Multi-Node_Cluster).
but failed. when i use bin/hadoop dfsadmin -report it shows that there is only one datanode on, $ bin/hadoop dfsadmin -report Safe mode is ON Total raw bytes: 20317106176 (18.92 GB) Remaining raw bytes: 12607342427 (11.74 GB) Used raw bytes: 834834432 (796.16 MB) % used: 4.11% Total effective bytes: 0 (0 KB) Effective replication multiplier: Infinity ------------------------------------------------- Datanodes available: 1 Name: 192.168.3.8:50010 State : In Service Total raw bytes: 20317106176 (18.92 GB) Remaining raw bytes: 12607342427(11.74 GB) Used raw bytes: 834834432 (796.16 MB) % used: 4.11% Last contact: Fri Sep 26 15:46:19 CST 2008 and then I check the logs of datanodes which expect to run on other hosts, I found that 2008-09-26 15:47:54,744 INFO org.apache.hadoop.dfs.DataNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting DataNode STARTUP_MSG: host = localhost.jobui.com/127.0.0.1 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.18.1 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.18 -r 694836; compiled by 'hadoopqa' on Fri Sep 12 23:29:35 UTC 2008 ************************************************************/ 2008-09-26 15:48:15,896 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /192.168.3.8:54310. Already tried 0 time(s). 2008-09-26 15:48:36,898 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /192.168.3.8:54310. Already tried 1 time(s). 2008-09-26 15:48:57,900 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /192.168.3.8:54310. Already tried 2 time(s). ... I take 192.168.3.8 as namenode, and 192.168.3.7, 192.168.3.8, 192.168.3.9 as datanodes. But obviously remote datanodes cannot start sucessfully. when I use jps on 192.168.3.7, it seems work fine. $ jps 5131 Jps 4561 DataNode but the namenode cannot find it. can anyone give me a solution? thanks a lot. Jeremy -- My research interests are distributed systems, parallel computing and bytecode based virtual machine. http://coderplay.javaeye.com
