HDFS+Zookeeper+Hbase错误

1、在安装Hbase时报如下错误：

2013-06-13 20:11:34,749 INFO org.apache.zookeeper.server.NIOServerCnxn: Closed socket connection for client /127.0.0.1:48725 (no session established for client)
2013-06-13 20:11:34,749 INFO org.apache.hadoop.hbase.zookeeper.MiniZooKeeperCluster: Started MiniZK Cluster and connect 1 ZK server on client port: 2181
2013-06-13 20:11:34,879 DEBUG org.apache.hadoop.hbase.master.HMaster: Set serverside HConnection retries=100
2013-06-13 20:11:35,400 ERROR org.apache.hadoop.hbase.master.HMasterCommandLine: Failed to start master
java.lang.RuntimeException: Failed construction of Master: class org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMasterCannot assign requested address
	at org.apache.hadoop.hbase.util.JVMClusterUtil.createMasterThread(JVMClusterUtil.java:134)
	at org.apache.hadoop.hbase.LocalHBaseCluster.addMaster(LocalHBaseCluster.java:197)
	at org.apache.hadoop.hbase.LocalHBaseCluster.<init>(LocalHBaseCluster.java:147)
	at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:146)
	at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:104)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
	at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:76)
	at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2079)
Caused by: java.net.BindException: Problem binding to /60.191.124.236:0 : Cannot assign requested address
	at org.apache.hadoop.hbase.ipc.HBaseServer.bind(HBaseServer.java:258)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Listener.<init>(HBaseServer.java:482)
	at org.apache.hadoop.hbase.ipc.HBaseServer.<init>(HBaseServer.java:1559)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.<init>(WritableRpcEngine.java:252)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getServer(WritableRpcEngine.java:201)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getServer(WritableRpcEngine.java:55)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.getServer(HBaseRPC.java:330)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.getServer(HBaseRPC.java:319)
	at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:306)
	at org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMaster.<init>(HMasterCommandLine.java:221)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.apache.hadoop.hbase.util.JVMClusterUtil.createMasterThread(JVMClusterUtil.java:131)
	... 7 more
Caused by: java.net.BindException: Cannot assign requested address
	at sun.nio.ch.Net.bind(Native Method)
	at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
	at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
	at org.apache.hadoop.hbase.ipc.HBaseServer.bind(HBaseServer.java:256)
	... 21 more

原因是主机名没有绑定host，设置/etc/hosts,127.0.0.1 主机名
PS：如果按照下面的步骤操作，这个问题就可以避免。

接下来出现的几个问题基本都是和HOSTNAME有关系：
1、2012-11-12 16:41:39,099 [myid:] - INFO  [main-SendThread(x.x.x.x:2181):ClientCnxn$SendThread@966] - Opening socket connection to server x.x.x.x/x.x.x.x:2181. Will not attempt to authenticate using SASL (无法定位登录配置)
2、ERROR: org.apache.hadoop.hbase.MasterNotRunningException: Retried 7 times
3、ERROR: org.apache.hadoop.hbase.PleaseHoldException: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing
这几个问题基本是和hosts配置有关，zookeeper对IP的支持也特别弱，再做关联的时候建议最好是HOSTNAME，具体的配置是：
在/etc/hosts中配置机器名和相应的IP(三台机器一样的配置):

192.168.16.133 namenode
192.168.16.134 datanode1
192.168.16.135 datanode2

PS:机器名不要映射到127.0.0.1上

在各个机器上分别中配置机器名:

vi /etc/sysconfig/network
HOSTNAME=namenode
HOSTNAME=datanode1
HOSTNAME=datanode2

修改完后记得使设置生效，运行命令:hostname namenode、hostname datanode1、hostname datanode2,如果不行就重启机器；

接着就把所有配置文件的IP换成HOSTNAME。

另外还有很重要的一点就是服务器时间一定要同步，至少也要保证服务器时间相差不要太远。

以上操作完了，在把hdfs format一下，全部重新启动，hdfs->zookeeper->hbase。


MapReduce操作错误：
1、

13/06/22 17:02:00 ERROR security.UserGroupInformation: PriviledgedActionException as:zhangsan cause:java.net.UnknownHostException: unknown host: namenode
Exception in thread "main" java.net.UnknownHostException: unknown host: namenode

之前在linux绑定的主机名需要在本地windows hosts文件中绑定，格式：IP linux主机名