[wildfly-dev] allow-resource-service-restart=true

[Darran Lofthouse]

A problem that you quickly run into however is that supporting the 
allow-resource-service-restart is that in a number of cases restarting a 
service will have the effect of restarting half of the application 
server anyway.

As an example if you restart any new security services the chances are 
high that you either trigger a restart of all management related 
services or all application related services.

So sometimes you may want to go one step further and support real time 
updates to the underlying services - however we don't really have a flag 
an administrator can use to say if real time updates should be applied. 
I would imaging some administrators benefit from being able to apply 
management model only changes and coordinate when they actually take effect.

Regards,
Darran Lofthouse.


On 08/11/16 12:00, Rostislav Svoboda wrote:
>
>> Not all operations handle the allow-service-restart header
>
> Sure, atm it depends a bit on the underlying service.
>
> @statistics-enabled
> Shouldn't be the goal to enable & disable stats without reload or restart required at all ?
> There are some people/customers which restart or reload their farm of servers only on planned days.
> For example for WS subsystem we can enable and disable without reload required, allow-resource-service-restart is to me just helper to avoid full reload.
>
> @Reduce reload-required in general
> I think some long-term effort is needed, less reload-required is better for end-user experience.
> This probably needs to be more RFE-ish.
>
> Regards.
> Rostislav
>
>>> On 4 Nov 2016, at 15:09, Martin Stefanko <mstefank at redhat.com> wrote:
>>>
>>>
>>> Hi,
>>>
>>> I am looking for help with the usage of the allow-resource-service-restart
>>> header. For the following examples each attribute is a boolean with
>>> "restart-required" set to "no-services".
>>>
>>> When I run
>>>
>>> /subsystem=jmx:write-attribute(name=non-core-mbean-sensitivity,value=true){allow-resource-service-restart=true}
>>>
>>> it works as expected, but
>>>
>>> /subsystem=undertow:write-attribute(name=statistics-enabled,value=true){allow-resource-service-restart=true}
>>>
>>> for instance, puts the server into the reload-required state.
>>>
>>> This is happening on several other places so I want to ask if it is a
>>> desired behavior.
>>>
>>>
>>> Martin Stefanko
>>>
>>> Associate Software Engineer
>>> JBoss Sustaining Engineering Team
>>> Red Hat Czech s.r.o.