On Wed, Jun 18, 2014 at 2:20 PM, Akka Team <[email protected]> wrote:

> Hi Johannes,
>
> Thank you for reporting! It seems like allow-local-routees is a bit
> confusing. I created a ticket: https://github.com/akka/akka/issues/15412
>
>
>
>> How should I properly make sure the cluster aware routers get
>> initialized?
>>
>
> Since this kind of router is very dynamic, you cannot reliably detect that
> there are available routees at all. At the point where it would return to
> you "Hey, I am ready", it might be that all nodes are gone already because
> of a network failure for example. You can use the GetRoutees message and
> check if there are routees available, but it cannot guarantee that those
> routees will be there when you want to use them. This is a general problem
> and is not limited to initialization.
>
> There is also a relevant Note in the docs which you should consider:
>
> "The routee actors should be started as early as possible when starting
> the actor system, because the router will try to use them as soon as the
> member status is changed to 'Up'. If it is not available at that point it
> will be removed from the router and it will only re-try when the cluster
> members are changed"
>

That section is wrong, as previously reported in ticket:
https://github.com/akka/akka/issues/15241

A Group router will send to the defined paths, no matter if the the
destination routees are running or not. You need to use acknowledgement
message to know that the message reached the destination.

/Patrik


>
> -Endre
>
>
>> I'm attaching a test class that I can reproduce my case with. I'm using
>> Akka 2.3.0.
>>
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>
>
>
> --
> Akka Team
> Typesafe - The software stack for applications that scale
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>
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-- 

Patrik Nordwall
Typesafe <http://typesafe.com/> -  Reactive apps on the JVM
Twitter: @patriknw

-- 
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>>>>>>>>>>      Check the FAQ: 
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>>>>>>>>>>      Search the archives: https://groups.google.com/group/akka-user
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