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-1 for upgrading it in 6.1. Known devil is better than unknown angel :)

In 7.0 we can try 3.5.0 with updated Erlang.

~thanks


--
Best regards,
Sergii Golovatiuk,
Skype #golserge
IRC #holser

On Wed, Apr 29, 2015 at 12:20 PM, Davanum Srinivas <dsrinivas at mirantis.com>
wrote:

> Bogdan,
>
> Pacemaker, corosync etc, we picked vivid packages right? So don't we test
> what's in vivid for this too? Apparently it's 3.4.3-2 per [0].
>
> I agree, we should not do this in 6.1, However, we should start testing
> this ASAP.
>
> Another data point, Alexander Nevenchannyy pointed out to me that 3.5.0
> came with an updated Erlang that has the following fix:
>
> OTP-11497  To prevent a race condition if there is a short communication
>
> problem when node-down and node-up events are received. They
>
> are now stored and later checked if the node came up just
>
> before mnesia flagged the node as down. (Thanks to Jonas Falkevik )
>
> which seems interesting as well.
>
> thanks,
>
> dims
> [0] https://launchpad.net/ubuntu/vivid/+package/rabbitmq-server
> [1] http://www.erlang.org/download/otp_src_17.0.readme
>
> On Wed, Apr 29, 2015 at 4:04 AM, Bogdan Dobrelya <bdobrelia at mirantis.com>
> wrote:
>
>> Hello.
>>
>> There are several concerns why we have to upgrade RabbitMQ to 3.4.0 [0]:
>> 1) At least two bugfixes related to the current high-load issue with MQ
>> [1]:
>> - 26404 prevent queue synchronisation from hanging if there is a very
>> short partition just as it starts (since 3.1.0)
>> - 26368 prevent autoheal from hanging when loser shuts down before the
>> winner  learns it is the winner (since 3.1.0)
>> 2) We should as well check how the new 'pause-if-all-down' option works
>> for split brain recovery.
>> 3) We should address the 'force_boot' recommendations from this mail
>> thread [2] to speed up the MQ cluster assemble time.
>>
>> The question is - is it worth it to do this in the 6.1 release scope?
>> I vote to postpone this for the 7.0 dev cycle as the impact of such
>> changes might be unpredictable.
>>
>> [0] https://www.rabbitmq.com/release-notes/README-3.4.0.txt
>> [1] https://bugs.launchpad.net/fuel/+bug/1447619
>> [2]
>>
>> http://www.mail-archive.com/openstack-dev@lists.openstack.org/msg51625.html
>>
>> --
>> Best regards,
>> Bogdan Dobrelya,
>> Skype #bogdando_at_yahoo.com
>> Irc #bogdando
>>
>
>
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