Hi, Srinidhi Next time you will see this issue, take jstack of a RS several times in a row. W/o stack traces it is hard to tell what was going on with your cluster after upgrade.
-Vlad On Tue, Sep 4, 2018 at 3:50 PM Srinidhi Muppalla <srinid...@trulia.com> wrote: > 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 >
