Upgraded riak 1.4.9 is pegging the CPU

Alain Rodriguez alain at uber.com
Thu Jun 5 11:49:09 EDT 2014

Thanks for the quick reply and no I did not. Is this something I should be
able to do now (stop, remove files, start again) or is it too late? How
could I verify this is the issue?

On Thu, Jun 5, 2014 at 8:42 AM, Shane McEwan <shane at mcewan.id.au> wrote:

> On 05/06/14 16:20, Alain Rodriguez wrote:
> > Hi all,
> >
> > I upgraded 1 of 9 riak nodes in a cluster last night from 1.4.0 to
> > 1.4.9. The rest are running 1.4.0.
> >
> > Ever since I am seeing the upgraded node, riak01 consuming a
> > significantly larger percent of CPU and the PUT times on it have gotten
> > worse. htop indicicates one particular process pegging the CPU, and many
> > many more processes running than I was used to seeing before.
> G'day!
> Did you turn off and remove the Active Anti Entropy files before upgrading?
> From the 1.4.8 release notes:
> IMPORTANT We recommend removing current AAE trees before upgrading. That
> is, all files under the anti_entropy sub-directory. This will avoid
> potentially large amounts of repair activity once correct hashes start
> being added. The data in the current trees can only be fixed by a full
> rebuild, so this repair activity is wasteful. Trees will start to build
> once AAE is re-enabled. To minimize the impact of this, we recommend
> upgrading during a period of low activity.
> Shane.
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