初始化HDFS系統(tǒng)

　　　　在hadop2.7.1目錄下使用如下命令：

　　　　bin/hdfs namenode -format

多謝大家?guī)臀曳治鲆幌拢x謝了!

出現以下報錯：

17/03/12?20:01:39?INFO?util.GSet:?Computing?capacity?for?map?NameNodeRetryCache
17/03/12?20:01:39?INFO?util.GSet:?VM?type???????=?64-bit
17/03/12?20:01:39?INFO?util.GSet:?0.029999999329447746%?max?memory?889?MB?=?273.1?KB
17/03/12?20:01:39?INFO?util.GSet:?capacity??????=?2^15?=?32768?entries
Re-format?filesystem?in?Storage?Directory?/chroot/hadoop/tmp/dfs/name???(Y?or?N)?Y
17/03/12?20:01:41?WARN?net.DNS:?Unable?to?determine?local?hostname?-falling?back?to?"localhost"
java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known
	at?java.net.InetAddress.getLocalHost(InetAddress.java:1505)
	at?org.apache.hadoop.net.DNS.resolveLocalHostname(DNS.java:264)
	at?org.apache.hadoop.net.DNS.<clinit>(DNS.java:57)
	at?org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:966)
	at?org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:575)
	at?org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:157)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:991)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1429)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1554)
Caused?by:?java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known
	at?java.net.Inet4AddressImpl.lookupAllHostAddr(Native?Method)
	at?java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
	at?java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
	at?java.net.InetAddress.getLocalHost(InetAddress.java:1500)
	...?8?more
17/03/12?20:01:41?WARN?net.DNS:?Unable?to?determine?address?of?the?host-falling?back?to?"localhost"?address
java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known
	at?java.net.InetAddress.getLocalHost(InetAddress.java:1505)
	at?org.apache.hadoop.net.DNS.resolveLocalHostIPAddress(DNS.java:287)
	at?org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
	at?org.apache.hadoop.hdfs.server.namenode.NNStorage.newBlockPoolID(NNStorage.java:966)
	at?org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:575)
	at?org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:157)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:991)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1429)
	at?org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1554)
Caused?by:?java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known
	at?java.net.Inet4AddressImpl.lookupAllHostAddr(Native?Method)
	at?java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
	at?java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
	at?java.net.InetAddress.getLocalHost(InetAddress.java:1500)
	...?8?more
17/03/12?20:01:41?INFO?namenode.FSImage:?Allocated?new?BlockPoolId:?BP-612298536-127.0.0.1-1489320101369
17/03/12?20:01:41?INFO?common.Storage:?Storage?directory?/chroot/hadoop/tmp/dfs/name?has?been?successfully?formatted.
17/03/12?20:01:41?INFO?namenode.NNStorageRetentionManager:?Going?to?retain?1?images?with?txid?>=?0
17/03/12?20:01:41?INFO?util.ExitUtil:?Exiting?with?status?0
17/03/12?20:01:41?INFO?namenode.NameNode:?SHUTDOWN_MSG:?
/************************************************************
SHUTDOWN_MSG:?Shutting?down?NameNode?at?java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known
************************************************************/

輸出的最頂部有一句：

STARTUP_MSG:?Starting?NameNode
STARTUP_MSG:???host?=?java.net.UnknownHostException:?iZwz97cbcapiyem3o09u09Z:?iZwz97cbcapiyem3o09u09Z:?Name?or?service?not?known