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[yarn] state of App [ACCEPTED] [UNDEFINED] Hadoop

(hadoopMapReduce & Spark & Flink.....etc) on Yarn


* description

-> ratio of resources in the cluster which can be used to run application masters

-> ratio of concurent running application.


Application Master 의 전체 클러스터 내에서 가용 리소스의 비율을 의미하는 것으로, 디폴트값 0.1 인 경우에는 여러 Application Master를 수행할 수 없기 때문에 0.5로 변경


* change (0.1 -> 0.5)

* modify. ~/hadoop*/etc/hadoop/capacity-scheduler.xml
<property>
<name>yarn.scheduler.capacity.maximum-am-resource-percent</name>
<value>0.5</value>
 <description>
Maximum percent of resources in the cluster which can be used to run
 application masters i.e. controls number of concurrent running
 applications.
</description>
</property>

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