>From the stack trace, ColumnPrefixFilter is used during scan. Can you illustrate how various filters are formed thru FilterListWithOR ? It would be easier for other people to reproduce the problem given your query pattern.
Cheers On Thu, Sep 6, 2018 at 11:43 AM Srinidhi Muppalla <[email protected]> wrote: > Hi Vlad, > > Thank you for the suggestion. I recreated the issue and attached the stack > traces I took. Let me know if there’s any other info I can provide. We > narrowed the issue down to occurring when upgrading from 1.3.0 to any 1.4.x > version. > > Thanks, > Srinidhi > > On 9/4/18, 8:19 PM, "Vladimir Rodionov" <[email protected]> wrote: > > 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 <[email protected] > > > 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 > > > > >
