Hi @GangWar . thanks for the suggestion. I tried to ping between the nodes, not seing abnormal latency.
But looks like the loading time solve by changing my java version.
It now load pretty quick.
Btw the same happen when I'm running simple hdfs command such as
hdfs dfs -ls / . It will take me quite sometimes to list the directory.
But once java version changed, it is now looks fine. You think this is the real root cause?