场景：
在CentOS 6.8下安装hadoop3.1时，在格式化文件那一步报错，报错以下：java
# ./bin/hdfs namenode -format
WARNING: /opt/hadoop311/logs does not exist. Creating.
2019-02-06 18:03:33,226 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = note01/127.0.0.1
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 3.1.1
2019-02-06 18:03:34,087 ERROR conf.Configuration: error parsing conf hdfs-site.xml
com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuratiot>; expected </configuration>.
at [row,col,system-id]: [28,15,"file:/opt/hadoop311/etc/hadoop/hdfs-site.xml"]
at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:621)
at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:491)
at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:475)
at com.ctc.wstx.sr.BasicStreamReader.reportWrongEndElem(BasicStreamReader.java:3365)
at com.ctc.wstx.sr.BasicStreamReader.readEndElem(BasicStreamReader.java:3292)
at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2911)
at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1123)
at org.apache.hadoop.conf.Configuration$Parser.parseNext(Configuration.java:3257)
at org.apache.hadoop.conf.Configuration$Parser.parse(Configuration.java:3063)
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2986)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2926)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2806)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1366)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1338)
at org.apache.hadoop.conf.Configuration.setBoolean(Configuration.java:1679)
at org.apache.hadoop.util.GenericOptionsParser.processGeneralOptions(GenericOptionsParser.java:339)
at org.apache.hadoop.util.GenericOptionsParser.parseGeneralOptions(GenericOptionsParser.java:572)
at org.apache.hadoop.util.GenericOptionsParser.<init>(GenericOptionsParser.java:174)
at org.apache.hadoop.util.GenericOptionsParser.<init>(GenericOptionsParser.java:156)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1587)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1710)
2019-02-06 18:03:34,112 ERROR namenode.NameNode: Failed to start namenode.
java.lang.RuntimeException: com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuratiot>; expected </configuration>.
at [row,col,system-id]: [28,15,"file:/opt/hadoop311/etc/hadoop/hdfs-site.xml"]
at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:3003)
at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2926)
at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2806)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1366)
at org.apache.hadoop.conf.Configuration.set(Configuration.java:1338)
at org.apache.hadoop.conf.Configuration.setBoolean(Configuration.java:1679)
at org.apache.hadoop.util.GenericOptionsParser.processGeneralOptions(GenericOptionsParser.java:339)
at org.apache.hadoop.util.GenericOptionsParser.parseGeneralOptions(GenericOptionsParser.java:572)
at org.apache.hadoop.util.GenericOptionsParser.<init>(GenericOptionsParser.java:174)
at org.apache.hadoop.util.GenericOptionsParser.<init>(GenericOptionsParser.java:156)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1587)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1710)
Caused by: com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuratiot>; expected </configuration>.
at [row,col,system-id]: [28,15,"file:/opt/hadoop311/etc/hadoop/hdfs-site.xml"]
缘由：
Unexpected close tag </configuratiot>; expected </configuration>.
报错信息提示得很明确，由于标签</configuratiot>出错，应当为</configuration>；node
在粘贴信息时，不当心将标签更改错致使apache
解决：
把配置文件hdfs-site.xml里的</configuratiot>更改成</configuration>后，从新格式化便可。oop