2014-09-20 08:08:54,179 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. java.io.IOException: NameNode is not formatted. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:331) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:104) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:427) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:395) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:299) 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) 2014-09-20 08:08:54,199 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.io.IOException: NameNode is not formatted. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:331) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:104) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:427) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:395) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:299) 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)
解决方法：
格式化NameNode
[root@hadoop bin]# ./hadoop namenode -format 13/06/28 22:50:23 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = java.net.UnknownHostException: hadoop: hadoop STARTUP_MSG: args = [-format] STARTUP_MSG: version = 0.20.2 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010 ************************************************************/ 13/06/28 22:50:23 INFO namenode.FSNamesystem: fsOwner=root,root 13/06/28 22:50:23 INFO namenode.FSNamesystem: supergroup=supergroup 13/06/28 22:50:23 INFO namenode.FSNamesystem: isPermissionEnabled=true 13/06/28 22:50:38 INFO metrics.MetricsUtil: Unable to obtain hostName java.net.UnknownHostException: hadoop: hadoop at java.net.InetAddress.getLocalHost(InetAddress.java:1354) at org.apache.hadoop.metrics.MetricsUtil.getHostName(MetricsUtil.java:91) at org.apache.hadoop.metrics.MetricsUtil.createRecord(MetricsUtil.java:80) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.initialize(FSDirectory.java:73) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.<init>(FSDirectory.java:68) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:854) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965) 13/06/28 22:50:38 INFO common.Storage: Image file of size 94 saved in 0 seconds. 13/06/28 22:50:38 INFO common.Storage: Storage directory /tmp/hadoop-root/dfs/name has been successfully formatted. 13/06/28 22:50:38 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at java.net.UnknownHostException: hadoop: hadoop ************************************************************/
问题：
2014-09-20 08:02:32,476 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /tmp/hadoop-root/dfs/name does not exist 2014-09-20 08:02:32,480 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-root/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:304) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:104) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:427) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:395) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:299) 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) 2014-09-20 08:02:32,494 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-root/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:304) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:104) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:427) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:395) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:299) 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) 2014-09-20 08:02:32,495 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at localhost/127.0.0.1 ************************************************************/
解决：
mkidr -pv /tmp/hadoop-root/dfs/name
