Basho Product Alert: Active Anti-Entropy in Riak 1.4.4 - 1.4.7

Tom Santero tsantero at basho.com
Wed Jan 29 12:53:12 EST 2014


Hi Dave,

This bug only affects 1.4.4 thru 1.4.8. The pre-releases of Riak 2.0 are
not affected. That said, remember that Riak 2.0-pre5 and pre11 are not
recommended for production use, and have only been released as a technical
preview.

Thanks,
Tom


On Wed, Jan 29, 2014 at 12:47 PM, Dave Martorana <dave at flyclops.com> wrote:

> While nowhere near as important, does this bug also exist in the current
> 2.0 pre-releases?
>
> Thanks,
>
> Dave
>
>
> On Wed, Jan 29, 2014 at 11:38 AM, Tom Santero <tsantero at basho.com> wrote:
>
>> Hello,
>>
>> Basho Engineering has uncovered a bug in the Active Anti-Entropy (AAE)
>> code in Riak versions 1.4.4 through 1.4.7, inclusive. This code incorrectly
>> generates hashes resulting in AAE failing to repair data. Data will
>> continue to be repaired via the standard read repair mechanisms. As the
>> incorrect hash generation will utilize system resources with no useful
>> result, our official recommendation is that you should not use AAE until a
>> fix is released in 1.4.8.
>>
>> To disable AAE on a running cluster, perform a `riak attach`, then:
>>
>> a.
>> rpc:multicall(riak_kv_entropy_manager, disable, []).
>> rpc:multicall(riak_kv_entropy_manager, cancel_exchanges, []).
>> z.
>>
>>
>> then Press Ctrl-c a, then Enter to quit.
>>
>> Next, you'll want to disable AAE on restart. Adjust your the app.config
>> file on all nodes in the cluster in the following manner:
>>
>> % Before
>> {anti_entropy, {on, []}}
>>
>> % After
>> {anti_entropy, {off, []}}
>>
>>
>> Once again, this issue only affects Riak versions 1.4.4, 1.4.5, 1.4.6,
>> and 1.4.7. There is no need to make changes to your cluster due to this bug
>> if you are not running one of those versions, or if you are not using AAE.
>> A forthcoming Riak 1.4.8 release will address this problem and be released
>> in the next few days.
>>
>>
>> Thank you,
>> Basho
>>
>> _______________________________________________
>> riak-users mailing list
>> riak-users at lists.basho.com
>> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.basho.com/pipermail/riak-users_lists.basho.com/attachments/20140129/561a63dd/attachment.html>


More information about the riak-users mailing list