[原]Hadoop配置问题汇总

1、未格式化Namenode

刚配置好集群后，都想运行看看效果。结果发现运行不了，是名称节点还未格式化。

hadoop　namenode　–format

2 、Retrying connect to server错误

通过http://192.168.11.233:50070/查看只有1个live node，查看Datanode日志发现，一直在尝试连接namenode。

由于/etc/hosts的第一项配置 127.0.01 hadoop01，节点根据配置监听127.0.0.1:9000端口。解决：修改/etc/hosts，去掉127.0.01中的域名配置。

************************************************************/ 2010-09-15 21:49:30,944 WARN org.apache.hadoop.hdfs.server.common.Util: Path /hadoop/hdfs/data should be specified as a URI in confi guration files. Please update hdfs configuration. 2010-09-15 21:49:31,120 INFO org.apache.hadoop.security.Groups: Group mapping impl=org.apache.hadoop.security.ShellBasedUnixGroupsMa pping; cacheTimeout=300000 2010-09-15 21:49:32,311 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 0 time(s). 2010-09-15 21:49:33,314 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 1 time(s). 2010-09-15 21:49:34,316 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 2 time(s). 2010-09-15 21:49:35,317 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 3 time(s). 2010-09-15 21:49:36,319 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 4 time(s). 2010-09-15 21:49:37,322 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 5 time(s). 2010-09-15 21:49:38,324 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 6 time(s). 2010-09-15 21:49:39,327 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 7 time(s). 2010-09-15 21:49:40,330 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 8 time(s). 2010-09-15 21:49:41,333 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 9 time(s). 2010-09-15 21:49:41,336 INFO org.apache.hadoop.ipc.RPC: Server at hadoop04.qqtech/192.168.11.233:9000 not available yet, Zzzzz... 2010-09-15 21:49:43,341 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 0 time(s). 2010-09-15 21:49:44,344 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: hadoop04.qqtech/192.168.11.233:9000. Already tried 1 time(s).