CentOS 7 搭建 Hadoop 2.9.1 遇到的坑之 storage directory does not exist or is not accessible.

本文记录了Hadoop集群NameNode启动过程中遇到的错误：指定的存储目录不存在或无法访问。通过调整hdfs-site.xml配置文件中Namenode和Datanode的路径，成功解决了这一问题。

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2018-06-14 11:42:28,500 WARN org.apache.hadoop.hdfs.server.common.Storage: Storage directory /home/hadoopCluster/hadoop-2.9.1/tmp/dfs/name does not exist
2018-06-14 11:42:28,685 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Encountered exception loading fsimage
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/hadoopCluster/hadoop-2.9.1/tmp/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:375)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:226)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1048)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:681)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:666)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:728)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:953)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:932)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1673)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1741)
2018-06-14 11:42:28,747 INFO org.mortbay.log: Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@hadoop:50070
2018-06-14 11:42:28,752 WARN org.apache.hadoop.http.HttpServer2: HttpServer Acceptor: isRunning is false. Rechecking.
2018-06-14 11:42:28,756 WARN org.apache.hadoop.http.HttpServer2: HttpServer Acceptor: isRunning is false
2018-06-14 11:42:28,758 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping NameNode metrics system...
2018-06-14 11:42:28,759 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system stopped.
2018-06-14 11:42:28,759 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system shutdown complete.
2018-06-14 11:42:28,759 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.
org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/hadoopCluster/hadoop-2.9.1/tmp/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverStorageDirs(FSImage.java:375)
	at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:226)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1048)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:681)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:666)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:728)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:953)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:932)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1673)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1741)
2018-06-14 11:42:28,762 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /home/hadoopCluster/hadoop-2.9.1/tmp/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible.
2018-06-14 11:42:28,767 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hadoop/192.168.131.128

我的解决办法是将配置文件中 hdfs-site.xml 配置 namenode 和 datanode 的路径删除，这个问题就解决了