Hello all, We are currently running Hbase 1.3.0 on an EMR cluster running EMR 5.5.0. Recently, we attempted to upgrade our cluster to using Hbase 1.4.4 (along with upgrading our EMR cluster to 5.16). After upgrading, the CPU usage for all of our region servers spiked up to 90%. The load_one for all of our servers spiked from roughly 1-2 to 10 threads. After upgrading, the number of operations to the cluster hasn’t increased. After giving the cluster a few hours, we had to revert the upgrade. From the logs, we are unable to tell what is occupying the CPU resources. Is this a known issue with 1.4.4? Any guidance or ideas for debugging the cause would be greatly appreciated. What are the best steps for debugging CPU usage?
Thank you, Srinidhi
