本文是对《【硬刚大数据之学习路线篇】从零到大数据专家的学习指南(全面升级版)》的Hadoop部分补充。
5 Yarn常用命令
Yarn状态的查询,除了可以在hadoop103:8088页面查看外,还可以通过命令操作。常见的命令操作如下所示:
需求:执行WordCount案例,并用Yarn命令查看任务运行情况。
[atguigu@hadoop102 hadoop-3.1.3]$ myhadoop.sh start
[atguigu@hadoop102 hadoop-3.1.3]$ hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar wordcount /input /output
5.1 yarn application查看任务
(1)列出所有Application:
[atguigu@hadoop102 hadoop-3.1.3]$ yarn application -list
2021-02-06 10:21:19,238 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8032
Total number of applications (application-types: [], states: [SUBMITTED, ACCEPTED, RUNNING] and tags: []):0
Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
(2)根据Application状态过滤:yarn application -list -appStates (所有状态:ALL、NEW、NEW_SAVING、SUBMITTED、ACCEPTED、RUNNING、FINISHED、FAILED、KILLED)
[atguigu@hadoop102 hadoop-3.1.3]$ yarn application -list -appStates FINISHED
2021-02-06 10:22:20,029 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8032
Total number of applications (application-types: [], states: [FINISHED] and tags: []):1
Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
application_1612577921195_0001 word count MAPREDUCE atguigu default FINISHED SUCCEEDED 100% http://hadoop102:19888/jobhistory/job/job_1612577921195_0001
(3)Kill掉Application:
[atguigu@hadoop102 hadoop-3.1.3]$ yarn application -kill application_1612577921195_0001
2021-02-06 10:23:48,530 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8032
Application application_1612577921195_0001 has already finished
5.2 yarn logs查看日志
5.3 yarn applicationattempt查看尝试运行的任务
(1)列出所有Application尝试的列表:yarn applicationattempt -list <ApplicationId>
5.4 yarn container查看容器
(1)列出所有Container:yarn container -list <ApplicationAttemptId>
[atguigu@hadoop102 hadoop-3.1.3]$ yarn container -list appattempt_1612577921195_0001_000001
2021-02-06 10:28:41,396 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8032
Total number of containers :0
Container-Id Start Time Finish Time State Host Node Http Address
5.5 yarn node查看节点状态
列出所有节点:yarn node -list -all
5.6 yarn rmadmin更新配置
加载队列配置:yarn rmadmin -refreshQueues
[atguigu@hadoop102 hadoop-3.1.3]$ yarn rmadmin -refreshQueues
2021-02-06 10:32:03,331 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8033
5.7 yarn queue查看队列
打印队列信息:yarn queue -status <QueueName>
[atguigu@hadoop102 hadoop-3.1.3]$ yarn queue -status default
2021-02-06 10:32:33,403 INFO client.RMProxy: Connecting to ResourceManager at hadoop103/192.168.10.103:8032
Queue Information :
Queue Name : default
State : RUNNING
Capacity : 100.0%
Current Capacity : .0%
Maximum Capacity : 100.0%
Default Node Label expression : <DEFAULT_PARTITION>
Accessible Node Labels : *
Preemption : disabled
Intra-queue Preemption : disabled
6 Yarn生产环境核心参数