hadoop.tmp.dir：A base for other temporary directories.
集群运行后，修改该配置项后，发现类似错误：
-- ::, INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /tmp/hadoop-grid/dfs/name does not exist.
-- ::, ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed.
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-grid/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:)
at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:)
-- ::, INFO org.apache.hadoop.ipc.Server: Stopping server on
Hadoop无法找到dfs/name 这个dfs文件系统的域名空间文件。
重新配置了hadoop.tmp.dir 目录，必须重新格式hdfs。
hadoop namenode -format -cluster ns1