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