SHUTDOWN_MSG: Shutting down NameNode at java.net.UnknownHostException

原創

2020-02-21 16:10

啓動hadoop namenode -format命令時報如下錯誤：

java.net.UnknownHostException: #centos-linux.shared
master: #centos-linux.shared
master
	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
	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:945)
	at org.apache.hadoop.hdfs.server.namenode.NNStorage.newNamespaceInfo(NNStorage.java:573)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:144)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:899)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1310)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1424)
Caused by: java.net.UnknownHostException: #centos-linux.shared
master
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
	... 8 more
16/06/23 17:29:40 INFO namenode.FSImage: Allocated new BlockPoolId: BP-127474426-127.0.0.1-1466674179873
16/06/23 17:29:40 INFO common.Storage: Storage directory /home/qian/hadoop/tmp/dfs/name has been successfully formatted.
16/06/23 17:29:40 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0
16/06/23 17:29:40 INFO util.ExitUtil: Exiting with status 0
16/06/23 17:29:40 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at java.net.UnknownHostException: #centos-linux.shared
master: #centos-linux.shared
master
************************************************************/
[root@centos-linux sbin]#

原因很簡單，我以爲/etc/hostname裏面可以用#註釋，於是我把之前的代碼centos-linux.shared註釋掉