Why doing it differently than for any other OSGi service?
Although the service ID is not predictable in general older services beat newer 
services, which is IMHO good enough.
I am fine with issuing a warn (if easy to implement) but I am against rejecting 
for consistency reasons.

Konrad


> On 11. May 2022, at 17:22, Carsten Ziegeler <cziege...@apache.org> wrote:
> 
> +1 to what Konrad said.
> 
> Service ranking is more predictable than just using the "first"
> 
> Regards
> Carsten
> 
> Am 11.05.2022 um 17:18 schrieb Konrad Windszus:
>> IMHO the regular OSGi semantics should apply here as well, i.e. higher 
>> service ranking wins (if tie lower bundle id wins). That is also documented 
>> at 
>> https://sling.apache.org/documentation/the-sling-engine/servlets.html#servlet-resolution-order
>>  
>> <https://sling.apache.org/documentation/the-sling-engine/servlets.html#servlet-resolution-order>
>> In any case this should only be the last criteria if selectors, extensions 
>> and method are the same for more then one servlet resolution candidate.
>> Throwing an exception/refusing to register the servlet is wrong and would be 
>> a regression.
>> Konrad
>>> On 11. May 2022, at 17:14, Bertrand Delacretaz <bdelacre...@apache.org> 
>>> wrote:
>>> 
>>> Hi,
>>> 
>>> I forgot if we discussed this already, if that's the case pointers are 
>>> welcome.
>>> 
>>> Adrian Kozma created SLING-11315 about this, and I tentatively added a
>>> new test [1] to explore the current behavior.
>>> 
>>> It looks like the first registered servlet wins, but that might be
>>> just by chance.
>>> 
>>> Do people agree that Sling should refuse to register servlets that
>>> have the same set of mount parameters as existing ones?
>>> 
>>> I think that would help avoid difficult to troubleshoot situations.
>>> 
>>> -Bertrand
>>> 
>>> [1] 
>>> https://github.com/apache/sling-org-apache-sling-servlets-resolver/commit/1603a0ecb2ab8b4395560c0d53d9e5569b68a568
> 
> -- 
> Carsten Ziegeler
> Adobe
> cziege...@apache.org

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