Hi all, We were trying to setup hadoop in our linux environments. When we tried to use a slow machine as the namenode (some Pentium III machine with 512Mb ram). It seems that it was unable to accept connection from other datanodes. (I can access its status from http at port 50070 however).
But it works fine on a faster machine (Pentium4 3Ghz with 3Gb ram). The settings, etc are exactly the same. The problem seems to be on the namenode. Is it because the machine is slow ? The version we use is 0.12.3 Any help is appreciated. Following is the log from the abnormal namenode. 2007-05-09 18:18:46,998 INFO org.apache.hadoop.dfs.StateChange: STATE* Network topology has 0 racks and 0 datanodes 2007-05-09 18:18:47,000 INFO org.apache.hadoop.dfs.StateChange: STATE* UnderReplicatedBlocks has 0 blocks 2007-05-09 18:18:47,432 INFO org.mortbay.util.Credential: Checking Resource aliases 2007-05-09 18:18:48,051 INFO org.mortbay.http.HttpServer: Version Jetty/5.1.4 2007-05-09 18:18:50,524 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2007-05-09 18:18:51,064 INFO org.mortbay.util.Container: Started WebApplicationContext[/,/] 2007-05-09 18:18:51,065 INFO org.mortbay.util.Container: Started HttpContext[/logs,/logs] 2007-05-09 18:18:51,065 INFO org.mortbay.util.Container: Started HttpContext[/static,/static] 2007-05-09 18:18:51,147 INFO org.mortbay.http.SocketListener: Started SocketListener on 0.0.0.0:50070 2007-05-09 18:18:51,148 INFO org.mortbay.util.Container: Started [EMAIL PROTECTED] 2007-05-09 18:18:51,223 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 9000: starting 2007-05-09 18:18:51,226 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 9000: starting 2007-05-09 18:18:51,227 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 9000: starting 2007-05-09 18:18:51,228 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 9000: starting 2007-05-09 18:18:51,229 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 9000: starting 2007-05-09 18:18:51,391 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 9000: starting 2007-05-09 18:18:51,392 INFO org.apache.hadoop.ipc.Server: IPC Server handler 5 on 9000: starting 2007-05-09 18:18:51,393 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 9000: starting 2007-05-09 18:18:51,394 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 9000: starting 2007-05-09 18:18:51,395 INFO org.apache.hadoop.ipc.Server: IPC Server handler 8 on 9000: starting 2007-05-09 18:18:51,397 INFO org.apache.hadoop.ipc.Server: IPC Server handler 9 on 9000: starting And these are from the datanode 2007-05-09 18:35:13,263 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 1 time(s). 2007-05-09 18:35:14,266 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 2 time(s). 2007-05-09 18:35:15,270 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 3 time(s). 2007-05-09 18:35:16,274 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 4 time(s). 2007-05-09 18:35:17,279 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 5 time(s). 2007-05-09 18:35:18,283 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 6 time(s). 2007-05-09 18:35:19,288 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 7 time(s). 2007-05-09 18:35:20,293 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 8 time(s). 2007-05-09 18:35:21,295 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 9 time(s). 2007-05-09 18:35:22,298 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 10 time(s). 2007-05-09 18:35:23,304 INFO org.apache.hadoop.ipc.RPC: Server at hadoop01.ourcompany.com/192.168.1.179:9000 not available yet, Zzzzz... 2007-05-09 18:35:24,308 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 1 time(s). 2007-05-09 18:35:25,317 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 2 time(s). 2007-05-09 18:35:26,322 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop01.ourcompany.com/192.168.1.179:9000. Already tried 3 time(s). Thanks, Cedric
