运行时出现hadoop pagerank错误

Question

我在我的vmware上安装了hadoop并设计了我的jar文件pagerank。运行以下命令：

hadoop jar PageRank-1.0.0.jar PageRankDriver init输出输出2，我得到以下错误;

Failing this attempt.Diagnostics: [2017-12-01 12:55:58.278]Exception from container-launch.
Container id: container_1512069161738_0011_02_000001
Exit code: 1
Stack trace: ExitCodeException exitCode=1: 
        at org.apache.hadoop.util.Shell.runCommand(Shell.java:994)
        at org.apache.hadoop.util.Shell.run(Shell.java:887)
        at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:1212)
        at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:295)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.launchContainer(ContainerLaunch.java:457)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:277)
        at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:90)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

[2017-12-01 12:55:58.278]
[2017-12-01 12:55:58.279]Container exited with a non-zero exit code 1. Last 4096 bytes of stderr :
Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

Please check whether your etc/hadoop/mapred-site.xml contains the below configuration:
<property>
  <name>yarn.app.mapreduce.am.env</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
<property>
  <name>mapreduce.map.env</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
<property>
  <name>mapreduce.reduce.e nv</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
[2017-12-01 12:55:58.279]
[2017-12-01 12:55:58.279]Container exited with a non-zero exit code 1. Last 4096 bytes of stderr :
Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

Please check whether your etc/hadoop/mapred-site.xml contains the below configuration:
<property>
  <name>yarn.app.mapreduce.am.env</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
<property>
  <name>mapreduce.map.env</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
<property>
  <name>mapreduce.reduce.e nv</name>
  <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
</property>
[2017-12-01 12:55:58.279]
For more detailed output, check the application tracking page: http://number9.cs.stevens.edu:8088/cluster/app/application_1512069161738_0011 Then click on links to logs of each attempt.
. Failing the application.
2017-12-01 12:55:59,219 INFO mapreduce.Job: Counters: 0
Init Job Error

有谁知道如何解决这个问题？

Answer 1

在mapred-site.xml中进行配置更改，如下所示

<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
    <property>
        <name>yarn.app.mapreduce.am.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
    </property>
    <property>
        <name>mapreduce.map.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
    </property>
    <property>
        <name>mapreduce.reduce.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
    </property>
</configuration>

Answer 2

在编辑了重新启动所有服务的需要之后，上面的内容正在为我工​​作。

使用：

stop-all.sh
start-all.sh