We will give it a try.
Thanks!!
Wim
Op 30/07/2020 09:57 heeft Carsten Ziegeler <cziege...@apache.org> geschreven:
Hi,
The referenced documentation describes the procedure - which I believe
works. It is not mentioning to delete configurations in the launchpad
folder.
So I guess what you want to achieve is to not activate components in
standby mode - this can be done by using the run mode combination of
author and primary for these configurations, so putting them into a
config.author.primary folder.
The primary is started with the run mode "primary" and therefore the
configurations apply. The standby is not started with "primary" but
"standby" - the OSGi/JCR installer will take care of it and handle the
configurations properly.
Regards
Carsten
Am 30.07.2020 um 09:44 schrieb Wim Symons:
> Hi Carsten,
>
> Thanks for your swift reply.
>
> But that means, the procedure Adobe describes to correctly set up a
standby instance on
https://helpx.adobe.com/experience-manager/kb/how-to-setup-cold-standby-instance-in-AEM.html
is not clear on this subject.
>
> Is there *any* way you know to make this work?
> Can I reset the state of the JCR installer so it picks up all config
again?
>
> Other thought is to change the components that really should not get
active in standby mode to check the active runmode through the SlingSettings
interface upon component start.
> But that's quite a few, I'm thinking about components that start
immediately, or components that are scheduled with a "scheduler.expression"
(https://sling.apache.org/documentation/bundles/scheduler-service-commons-scheduler.html#scheduling-with-a-cron-expression)
property. That way the component stays active for OSGi, but doesn't act
because I programmed it to do so.
>
> Too bad it renders this statement
(https://sling.apache.org/documentation/bundles/sling-settings-org-apache-sling-settings.html#getting-the-run-modes-of-the-sling-instance-1)
unusable:
>
>> Getting run modes in this way is usually not needed, it's better to
define bundles or configurations that are only valid in specific run modes,
rather than making decisions in code based on run modes.
>
> Kind regards
>
> Wim
>
> Op 30/07/2020 09:13 heeft Carsten Ziegeler <cziege...@apache.org>
geschreven:
>
> Hi,
>
> the run mode "author" is sticky - once you start a AEM instance with
> that run mode it will continue to use it, regardless of what you
specify
> on the next startup. So in your example, the run mode author is
active
> for all three startups.
>
> Messing with the launchpad/config folder is not recommended as you
can
> run in exactly the problems you describe. The OSGi installer (the
main
> component used by the JCR installer) is not reverting changes done by
> other tools or humans. So what you describe is actually expected:
>
> When you manually remove configurations from launchpad/config and
> restart the instance (standby restart), the installer still has the
> state that it has installed the configurations previously. So it is
not
> acting - this is the intended behaviour as the installer is not
messing
> with changes done through other means (like this manual remove). And
as
> "author" is a sticky run mode, the installer sees no change in the
set
> of known configurations read from JCR.
>
> Similar on the next restart (without standby), the installer does
not do
> anything. Again, author run mode still active, no change.
>
> Regards
> Carsten
>
> Am 30.07.2020 um 08:38 schrieb Wim Symons:
> > Hi all,
> >
> > After 2 weeks of waiting on Daycare to respond, I’m reaching out
here,
> > as I think this is more Apache Sling related than AEM specific.
> >
> > I’m trying to successfully make an AEM primary author from a cold
> > standby author, but it fails.
> >
> > It fails because all our OSGi components with config bound to the
> > ‘author’ runmode doesn’t get installed after switching runmode.
> >
> > I looked at the source code, but it seems there is no way to
trigger the
> > JcrInstaller to re-initialize all OSGi config stored in the
repository.
> >
> > Is there any way to do that?
> >
> > A more detailed explanation of our process:
> >
> > You start by creating a standby author instance from a primary
instance
> > (runmode “author” is active).
> >
> > The OSGi configuration for our components is stored in
sling:OsgiConfig
> > nodes in the JCR below “config.author” folders.
> >
> > It is properly installed by the JCR Installer and the config files
can
> > be found in the launchpad/config folder on disk.
> >
> > We shut down the instance, *and remove all our OSGi config from the
> > launchpad/config folder on disk*.
> >
> > We do that to avoid our components getting active in the standby
runmode
> > as this is not wanted.
> >
> > The OSGi config stored in the launchpad/config folder on disk is
used,
> > not the OSGi config from the JCR.
> >
> > I think this is **issue (1)**.
> >
> > We start the instance with runmode “standby”.
> >
> > All is fine, AEM is acting as a standby instance, and our
components are
> > not active.
> >
> > We restart the instance, but now give it the runmode “author”
again.
> >
> > We would expect all OSGi configuration from the sling:OsgiConfig
nodes
> > below “config.author” folders would become installed by the OSGi
> > framework, but in fact, it does not.
> >
> > This is **issue (2)**.
> >
> > AEM acts as an author instance again, but all our components are
not
> > active because they don’t have any OSGi config (launchpad/config
is empty).
> >
> > How can I fix this?
> >
> > Or is this a situation Apache Sling can’t handle?
> >
> > Kind regards,
> >
> > *Wim Symons
> > AEM Lead Architect
> > *Digital Production Center
> >
> >
> > wim.sym...@vrt.be <mailto:wim.sym...@vrt.be>
> > Auguste Reyerslaan 52
> > B-1043 Brussel
> >
> >
> > VRT logo <http://www.vrt.be/>
> >
> >
> > -- Disclaimer --
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> > Auguste Reyerslaan 52
> > 1043 Brussel
> >
> > nv van publiek recht
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> > RPR Brussel
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> >
>
> --
> --
> Carsten Ziegeler
> Adobe Research Switzerland
> cziege...@apache.org
>
>
> -- Disclaimer --
> Vlaamse Radio- en Televisieomroeporganisatie
> Auguste Reyerslaan 52
> 1043 Brussel
>
> nv van publiek recht
> BTW BE 0244.142.664
> RPR Brussel
> VRT Gebruikersvoorwaarden <http://www.vrt.be/gebruiksvoorwaarden>
>
--
--
Carsten Ziegeler
Adobe Research Switzerland
cziege...@apache.org
-- Disclaimer --
Vlaamse Radio- en Televisieomroeporganisatie
Auguste Reyerslaan 52
1043 Brussel
nv van publiek recht
BTW BE 0244.142.664
RPR Brussel
VRT Gebruikersvoorwaarden <http://www.vrt.be/gebruiksvoorwaarden>
