iam using hadoop apache 2.7.1 with zookeeper quorum in order to achieve automatic failover on centos 7
and every thing is done ok but i am facing this strange problem supposing my active two name nodes are mn1 and mn2 when mn1 is off so because of automatic failover mn2 is active and iam using webhdfs requests which are directed to mn2 by client and the performance is greate but in the reverse status i mean when mn2 is off and mn1 becomes active and webhdfs requests are directed to mn1 the performance got stack until mn2 is on again ,even though mn2 is turned on again with no services notice1: mn1 and mn2 has same configurations and all cluster nodes are vms which are connected to virtual switch so there are no network issues to worry about notice2:there are no difference between two active name nodes performance if we issue hdfs commands the difference only in webhdfs interface requests (in curl requests) what could be possible reasons of this difference in performance between two active name nodes ?
