安装好hadoop集群之后,都会想着试一下自己的集群是否正常工作,最简单的方式就是运行hadoop提供的例子程序。
命令
hadoop jar hadoop-mapreduce-examples-2.6.4.jar pi 5 5
结果
[root@zk2 ~]# hadoop jar hadoop-mapreduce-examples-2.6.4.jar pi 5 5
Number of Maps = 5
Samples per Map = 5
Wrote input for Map #0
Wrote input for Map #1
Wrote input for Map #2
Wrote input for Map #3
Wrote input for Map #4
Starting Job
19/03/28 23:25:06 INFO client.RMProxy: Connecting to ResourceManager at /192.168.56.160:8032
19/03/28 23:25:07 INFO input.FileInputFormat: Total input paths to process : 5
19/03/28 23:25:07 INFO mapreduce.JobSubmitter: number of splits:5
19/03/28 23:25:08 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1553786668014_0001
19/03/28 23:25:08 INFO impl.YarnClientImpl: Submitted application application_1553786668014_0001
19/03/28 23:25:08 INFO mapreduce.Job: The url to track the job: http: