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Posted to users@activemq.apache.org by Paul Gale <pa...@gmail.com> on 2013/08/07 21:50:00 UTC

STOMP heart beat 'tolerance'

Hi,

Regarding the configuration of heart beating the STOMP protocol spec states:

    "- because of timing inaccuracies, the receiver SHOULD be tolerant and
take into account an error margin"

How 'tolerant' does ActiveMQ determine it will be when calculating its
'error margin' regarding the arrival of late heat beats?

For the sake of argument assume that heart beats (ignoring other values)
are configured as follows:

CONNECT

heart-beat:5000,0

CONNECTED:
heart-beat:0,5000

Thanks,
Paul

Re: STOMP heart beat 'tolerance'

Posted by Paul Gale <pa...@gmail.com>.

AMQ-4674 <https://issues.apache.org/jira/browse/AMQ-4674> has been created


On Wed, Aug 7, 2013 at 4:24 PM, Christian Posta
<ch...@gmail.com>wrote:

> Good question.
> Doesn't look like ActiveMQ 5.x has a grace period for the heart-beat.
> Apollo has 1.5x grace period. Can you open a JIRA and we can get that into
> ActiveMQ 5.x as well?
>
>
> On Wed, Aug 7, 2013 at 12:50 PM, Paul Gale <pa...@gmail.com> wrote:
>
> > Hi,
> >
> > Regarding the configuration of heart beating the STOMP protocol spec
> > states:
> >
> >     "- because of timing inaccuracies, the receiver SHOULD be tolerant
> and
> > take into account an error margin"
> >
> > How 'tolerant' does ActiveMQ determine it will be when calculating its
> > 'error margin' regarding the arrival of late heat beats?
> >
> > For the sake of argument assume that heart beats (ignoring other values)
> > are configured as follows:
> >
> > CONNECT
> >
> > heart-beat:5000,0
> >
> > CONNECTED:
> > heart-beat:0,5000
> >
> > Thanks,
> > Paul
> >
>
>
>
> --
> *Christian Posta*
> http://www.christianposta.com/blog
> twitter: @christianposta
>

Re: STOMP heart beat 'tolerance'

Posted by Christian Posta <ch...@gmail.com>.

Good question.
Doesn't look like ActiveMQ 5.x has a grace period for the heart-beat.
Apollo has 1.5x grace period. Can you open a JIRA and we can get that into
ActiveMQ 5.x as well?


On Wed, Aug 7, 2013 at 12:50 PM, Paul Gale <pa...@gmail.com> wrote:

> Hi,
>
> Regarding the configuration of heart beating the STOMP protocol spec
> states:
>
>     "- because of timing inaccuracies, the receiver SHOULD be tolerant and
> take into account an error margin"
>
> How 'tolerant' does ActiveMQ determine it will be when calculating its
> 'error margin' regarding the arrival of late heat beats?
>
> For the sake of argument assume that heart beats (ignoring other values)
> are configured as follows:
>
> CONNECT
>
> heart-beat:5000,0
>
> CONNECTED:
> heart-beat:0,5000
>
> Thanks,
> Paul
>



-- 
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta