hadoop常见的问题

1、namenode不能正常启动，查看日志，日志内容如下：

[ root@localhost logs]#  tail -f hadoop-root-namenode-localhost.log

2014-09-11 12:01:47,891 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.net.BindException: Problem binding to nameNode1/192.168.64.41:9000 : Cannot assign requested address

 at org.apache.hadoop.ipc.Server.bind(Server.java:267)

 at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:341)

 at org.apache.hadoop.ipc.Server.<init>(Server.java:1539)

 at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:569)

 at org.apache.hadoop.ipc.RPC.getServer(RPC.java:530)

 at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:324)

 at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:569)

 at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1479)

 at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1488)

Caused by: java.net.BindException: Cannot assign requested address

 at sun.nio.ch.Net.bind0(Native Method)

 at sun.nio.ch.Net.bind(Net.java:444)

 at sun.nio.ch.Net.bind(Net.java:436)

 at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)

 at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)

 at org.apache.hadoop.ipc.Server.bind(Server.java:265)

 ... 8 more

将配置文件中用到的域名修改为IP解决了该问题。