Hadoop集群搭建出现以下错误:

19/02/06 17:46:22 ERROR conf.Configuration: error parsing conf mapred-site.xml
com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuration>; expected </property>.
 at [row,col,system-id]: [23,15,"file:/usr/local/hadoop/etc/hadoop/mapred-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.loadResource(Configuration.java:2796)
	at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2725)
	at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2605)
	at org.apache.hadoop.conf.Configuration.get(Configuration.java:1103)
	at org.apache.hadoop.conf.Configuration.getTrimmed(Configuration.java:1157)
	at org.apache.hadoop.conf.Configuration.getLong(Configuration.java:1434)
	at org.apache.hadoop.security.Groups.<init>(Groups.java:112)
	at org.apache.hadoop.security.Groups.<init>(Groups.java:101)
	at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:449)
	at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:327)
	at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:294)
	at org.apache.hadoop.security.UserGroupInformation.isAuthenticationMethodEnabled(UserGroupInformation.java:381)
	at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:375)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1126)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1614)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1741)
19/02/06 17:46:22 ERROR namenode.NameNode: Failed to start namenode.
java.lang.RuntimeException: com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuration>; expected </property>.
 at [row,col,system-id]: [23,15,"file:/usr/local/hadoop/etc/hadoop/mapred-site.xml"]
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2961)
	at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2725)
	at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2605)
	at org.apache.hadoop.conf.Configuration.get(Configuration.java:1103)
	at org.apache.hadoop.conf.Configuration.getTrimmed(Configuration.java:1157)
	at org.apache.hadoop.conf.Configuration.getLong(Configuration.java:1434)
	....
	Exception in thread "Thread-1" java.lang.RuntimeException: com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuration>; expected </property>.
 at [row,col,system-id]: [23,15,"file:/usr/local/hadoop/etc/hadoop/mapred-site.xml"]
	at org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:2961)
	at org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:2725)
	at org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2605)
	at org.apache.hadoop.conf.Configuration.get(Configuration.java:1103)
	at org.apache.hadoop.conf.Configuration.getTimeDuration(Configuration.java:1690)
	at org.apache.hadoop.util.ShutdownHookManager.getShutdownTimeout(ShutdownHookManager.java:183)
	at org.apache.hadoop.util.ShutdownHookManager.shutdownExecutor(ShutdownHookManager.java:145)
	at org.apache.hadoop.util.ShutdownHookManager.access$300(ShutdownHookManager.java:65)
	at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:102)
Caused by: com.ctc.wstx.exc.WstxParsingException: Unexpected close tag </configuration>; expected </property>.
 at [row,col,system-id]: [23,15,"file:/usr/local/hadoop/etc/hadoop/mapred-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.loadResource(Configuration.java:2796)
	... 8 more

这个错误可能是在文件配置时有错误，错误中有提示是哪个文件配置出现了错误，我这个错误是在配置mapred-site.xml时，少写了</property>,害自己花了好长时间找错误。