Hadoop 问题小结

查看Hadoop控制台 http://172.16.0.10:8088/cluster/scheduler ，发现内存只有50%使用率；

登录master节点服务，yarn.scheduler.capacity.maximum-am-resource-percent 配置为 0.5 ，表示core的资源使用率不能超过50%

[root@ads-flink-online-master ~]# cat /etc/hadoop/conf.empty/capacity-scheduler.xml


    yarn.scheduler.capacity.maximum-am-resource-percent
    0.5
    
      Maximum percent of resources in the cluster which can be used to run 
      application masters i.e. controls number of concurrent running
      applications.
    
  

将yarn.scheduler.capacity.maximum-am-resource-percent改为0.8

[root@ads-flink-online-master ~]# vim /etc/hadoop/conf.empty/capacity-scheduler.xml

  
    yarn.scheduler.capacity.maximum-am-resource-percent
    0.8
    
      Maximum percent of resources in the cluster which can be used to run
      application masters i.e. controls number of concurrent running
      applications.