无法在hadoop 2.4.0上运行MapReduce作业 [英] Can't run a MapReduce job on hadoop 2.4.0

问题描述

我是hadoop的新手，这是我的问题。我在3台机器的簇上配置了hadoop 2.4.0和jdk1.7.60。我能够执行hadoop的所有命令。现在我修改了wordcount示例并创建了jar文件。我已经在hadoop 1.2.1上执行了这个jar文件并得到了结果。但现在在hadoop 2.4.0上我没有收到任何结果。

I am new to hadoop and here is my problem. I have configured hadoop 2.4.0 with jdk1.7.60 on cluster of 3 machine. I am able to execute all the commands of hadoop. Now I have modified wordcount example and created jar file. I have already executed with this jar file on hadoop 1.2.1 and got the result. But now on hadoop 2.4.0 I am not getting any result.

用于执行的命令

Command used for execution

$hadoop jar WordCount.jar WordCount /data/webdocs.dat /output

我收到以下消息：

I am getting following message from the setup:

14/06/29 19:35:18 INFO client.RMProxy: Connecting to ResourceManager at /192.168.2.140:8040
14/06/29 19:35:18 WARN mapreduce.JobSubmitter: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
14/06/29 19:35:19 INFO input.FileInputFormat: Total input paths to process : 1
14/06/29 19:35:19 INFO mapreduce.JobSubmitter: number of splits:12
14/06/29 19:35:19 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1403905542893_0004
14/06/29 19:35:19 INFO impl.YarnClientImpl: Submitted application application_1403905542893_0004
14/06/29 19:35:19 INFO mapreduce.Job: The url to track the job: http://192.168.2.140:8088/proxy/application_1403905542893_0004/
14/06/29 19:35:19 INFO mapreduce.Job: Running job: job_1403905542893_0004

此时没有任何信息更改。我等了15到20分钟，但仍然是相同的。

At this point no message change. I waited for 15 to 20 minutes but still the same.

这是我在资源经理的网页上看到的有关工作的内容：

This is what I see on resource manager's web page regarding the job:

State - ACCEPTED
FinalStatus - UNDEFINED
Progress - (progress bar in 0%)
Tracking UI - UNASSIGNED

Apps Submitted - 1
Apps Pending - 1
Apps Running - 0

I tried the other yarn command for execution but got the same result

$yarn jar WordCount.jar WordCount /data/webdocs.dat /output

以下是jps的输出：

Here is the output of jps:

21485 NameNode
23142 DataNode
28504 Jps
21704 ResourceManager
22082 JobHistoryServer

任何帮助或指导都将得到高度评价。

Any help or guidance will be highly appriciated.

推荐答案

我解决了这个问题。这是hadoop配置文件中的错误。
资源管理器端口8040上存在绑定异常。

I solved the problem. It was the mistake in the configuration file of the hadoop. There was bind exception on the port 8040 for resourcemanager.

我将hadoop yarn-site.xml从（旧yarn-site.xml）更改为

I changed the hadoop yarn-site.xml from (old yarn-site.xml):

<configuration>
<!-- Site specific YARN configuration properties -->
<property>
  <name>yarn.nodemanager.aux-services</name>
  <value>mapreduce_shuffle</value>
</property>
<property>
  <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
  <value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
  <name>yarn.resourcemanager.resource-tracker.address</name>
  <value>192.168.2.140:8025</value>
</property>
<property>
  <name>yarn.resourcemanager.scheduler.address</name>
  <value>192.168.2.140:8030</value>
</property>
<property>
  <name>yarn.resourcemanager.address</name>
  <value>192.168.2.140:8040</value>
</property>
</configuration>

到（new yarn-site.xml）：

To (new yarn-site.xml):

<configuration>
 <property>
  <name>yarn.nodemanager.aux-services</name>
  <value>mapreduce_shuffle</value>
 </property>
 <property>
  <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
  <value>org.apache.hadoop.mapred.ShuffleHandler</value>
 </property>
</configuration>

我删除了hadoop配置中的其他行
然后我使用以下命令启动resourcemanager和nodemanager

I deleted the other line in hadoop configuration Then I gace following commands to start resourcemanager and nodemanager

$yarn-daemon.sh start nodemanager
$yarn-daemon.sh start resourcemanager

然后我尝试执行我的工作并取得成功。

Then I tried executing my job and it was successfull.

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