Hadoop jobtracker.jsp 404

本文解决在启动Hadoop后,访问Hadoop Administration页面和jobtracker页面时出现404错误的问题。通过修改CLASSPATH路径并进行特定文件操作,页面访问恢复正常。

Hadoop启动以后,访问Hadoop Administration页面和jobtracker页面有404 错误。jps显示一切正常。

 

可能原因:

if [ -d "$HADOOP_HOME/build/webapps" ]; then
  CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build
fi

 

 

操作:

cd $HADOOP_HOME
mv build/ build_bak/

 页面访问恢复正常。

package cn.itcast.hadoop; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.NullWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Job; import org.apache.hadoop.mapreduce.lib.input.CombineTextInputFormat; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import java.io.IOException; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class WebLogDriver { public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException { // 创建日期格式化工具,用于生成输出目录的名称 DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss"); String date = dateFormat.format(new Date()); // 创建配置对象 Configuration configuration = new Configuration(); // 设置输入目录可以递归处理 configuration.set("mapreduce.input.fileinputformat.input.dir.recursive", "true"); // 创建 Job 实例 Job job = Job.getInstance(configuration); // 设置作业的输入格式类为 CombineTextInputFormat,用于合并小文件 job.setInputFormatClass(CombineTextInputFormat.class); // 设置作业的 Jar 包路径 job.setJarByClass(WebLogDriver.class); // 设置作业的 Mapper 类 job.setMapperClass(WebLogMap.class); // 设置 Map 阶段输出的键和值的类型 job.setMapOutputKeyClass(Text.class); job.setMapOutputValueClass(NullWritable.class); // 设置作业的输入路径 FileInputFormat.setInputPaths(job, new Path("/weblog")); // 设置作业的输出路径,路径名称包含当前时间,避免重复 FileOutputFormat.setOutputPath(job, new Path("/output/weblog/" + date)); // 提交作业并等待完成 Boolean result = job.waitForCompletion(true); // 根据作业执行结果退出 System.exit(result ? 0 : 1); } }"C:\Program Files\Java\jdk1.8.0_66\bin\java.exe" "-javaagent:D:\IntelliJ IDEA Community Edition 2023.3.8\lib\idea_rt.jar=51827:D:\IntelliJ IDEA Community Edition 2023.3.8\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_66\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_66\jre\lib\deploy.jar;C:\Program 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813.jar;C:\Users\雨与诗\.m2\repository\org\eclipse\jetty\jetty-client\9.4.20.v20190813\jetty-client-9.4.20.v20190813.jar;C:\Users\雨与诗\.m2\repository\org\eclipse\jetty\websocket\websocket-common\9.4.20.v20190813\websocket-common-9.4.20.v20190813.jar;C:\Users\雨与诗\.m2\repository\org\eclipse\jetty\websocket\websocket-api\9.4.20.v20190813\websocket-api-9.4.20.v20190813.jar;C:\Users\雨与诗\.m2\repository\org\jline\jline\3.9.0\jline-3.9.0.jar;C:\Users\雨与诗\.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-jobclient\3.3.0\hadoop-mapreduce-client-jobclient-3.3.0.jar;C:\Users\雨与诗\.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-common\3.3.0\hadoop-mapreduce-client-common-3.3.0.jar;C:\Users\雨与诗\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\雨与诗\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\雨与诗\.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-core\3.3.0\hadoop-mapreduce-client-core-3.3.0.jar;C:\Users\雨与诗\.m2\repository\org\apache\hadoop\hadoop-yarn-common\3.3.0\hadoop-yarn-common-3.3.0.jar;C:\Users\雨与诗\.m2\repository\com\sun\jersey\jersey-client\1.19\jersey-client-1.19.jar;C:\Users\雨与诗\.m2\repository\com\google\inject\guice\4.0\guice-4.0.jar;C:\Users\雨与诗\.m2\repository\javax\inject\javax.inject\1\javax.inject-1.jar;C:\Users\雨与诗\.m2\repository\aopalliance\aopalliance\1.0\aopalliance-1.0.jar;C:\Users\雨与诗\.m2\repository\com\sun\jersey\contribs\jersey-guice\1.19\jersey-guice-1.19.jar;C:\Users\雨与诗\.m2\repository\com\fasterxml\jackson\module\jackson-module-jaxb-annotations\2.10.3\jackson-module-jaxb-annotations-2.10.3.jar;C:\Users\雨与诗\.m2\repository\jakarta\xml\bind\jakarta.xml.bind-api\2.3.2\jakarta.xml.bind-api-2.3.2.jar;C:\Users\雨与诗\.m2\repository\jakarta\activation\jakarta.activation-api\1.2.1\jakarta.activation-api-1.2.1.jar;C:\Users\雨与诗\.m2\repository\com\fasterxml\jackson\jaxrs\jackson-jaxrs-json-provider\2.10.3\jackson-jaxrs-json-provider-2.10.3.jar;C:\Users\雨与诗\.m2\repository\com\fasterxml\jackson\jaxrs\jackson-jaxrs-base\2.10.3\jackson-jaxrs-base-2.10.3.jar;C:\Users\雨与诗\.m2\repository\com\google\inject\extensions\guice-servlet\4.0\guice-servlet-4.0.jar" cn.itcast.hadoop.WebLogDriver 2025-06-13 18:40:39 WARN Shell:693 - Did not find winutils.exe: {} java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.fileNotFoundException(Shell.java:548) at org.apache.hadoop.util.Shell.getHadoopHomeDir(Shell.java:569) at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:592) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:689) at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:78) at org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1689) at org.apache.hadoop.security.SecurityUtil.setConfigurationInternal(SecurityUtil.java:104) at org.apache.hadoop.security.SecurityUtil.<clinit>(SecurityUtil.java:88) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:312) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:300) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:567) at org.apache.hadoop.mapreduce.task.JobContextImpl.<init>(JobContextImpl.java:72) at org.apache.hadoop.mapreduce.Job.<init>(Job.java:152) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:195) at cn.itcast.hadoop.WebLogDriver.main(WebLogDriver.java:30) Caused by: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. at org.apache.hadoop.util.Shell.checkHadoopHomeInner(Shell.java:468) at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:439) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:516) ... 11 more 2025-06-13 18:40:39 WARN NativeCodeLoader:60 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2025-06-13 18:40:40 WARN MetricsConfig:134 - Cannot locate configuration: tried hadoop-metrics2-jobtracker.properties,hadoop-metrics2.properties 2025-06-13 18:40:40 INFO MetricsSystemImpl:374 - Scheduled Metric snapshot period at 10 second(s). 2025-06-13 18:40:40 INFO MetricsSystemImpl:191 - JobTracker metrics system started Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:736) at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:271) at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:287) at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:867) at org.apache.hadoop.fs.RawLocalFileSystem.mkOneDirWithMode(RawLocalFileSystem.java:549) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:589) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:561) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:588) at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:566) at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:334) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:162) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:113) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:148) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1576) at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1573) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1845) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1573) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1594) at cn.itcast.hadoop.WebLogDriver.main(WebLogDriver.java:52) Caused by: java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. -see https://wiki.apache.org/hadoop/WindowsProblems at org.apache.hadoop.util.Shell.fileNotFoundException(Shell.java:548) at org.apache.hadoop.util.Shell.getHadoopHomeDir(Shell.java:569) at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:592) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:689) at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:78) at org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1689) at org.apache.hadoop.security.SecurityUtil.setConfigurationInternal(SecurityUtil.java:104) at org.apache.hadoop.security.SecurityUtil.<clinit>(SecurityUtil.java:88) at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:312) at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:300) at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:567) at org.apache.hadoop.mapreduce.task.JobContextImpl.<init>(JobContextImpl.java:72) at org.apache.hadoop.mapreduce.Job.<init>(Job.java:152) at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:195) at cn.itcast.hadoop.WebLogDriver.main(WebLogDriver.java:30) Caused by: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. at org.apache.hadoop.util.Shell.checkHadoopHomeInner(Shell.java:468) at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:439) at org.apache.hadoop.util.Shell.<clinit>(Shell.java:516) ... 11 more Process finished with exit code 1怎么解决
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