hadoop3.1在文件格式化报错
场景： 在CentOS 6.8下安装hadoop3.1时，在格式化文件那一步报错，报错如下：
./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 ; expected . 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.ConfigurationParser.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.(GenericOptionsParser.java:174) at org.apache.hadoop.util.GenericOptionsParser.(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 ; expected . 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.(GenericOptionsParser.java:174) at org.apache.hadoop.util.GenericOptionsParser.(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 ; expected . at [row,col,system-id]: [28,15,"file:/opt/hadoop311/etc/hadoop/hdfs-site.xml"]
原因：
Unexpected close tag ; expected . 报错信息提示得很明确，因为标签出错，应当为；
在粘贴信息时，不小心将标签更改错导致
解决：
把配置文件hdfs-site.xml里的更改为后，重新格式化即可。
