Hi Patrik,

Thank you for your update.
Yes rolling update is one use case.
For Cluster.leave, do you mean the command line of Clustering? Or the API?
I will check out the 2.5-M1 document.


On Sunday, 5 February 2017 08:10:14 UTC+8, Patrik Nordwall wrote:
>
> You mean rolling upgrade? Stop a few nodes add new nodes, stop some more, 
> and so on?
>
> It's possible with Cluster.leave and such in Akka 2.4 but we have done 
> major improvements in this area for upcoming 2.5. You can try 2.5-M1. 
> http://doc.akka.io/docs/akka/2.5-M1/scala/actors.html#Coordinated_Shutdown
>
> Note, there is a bug in M1 which makes the sigterm part not working.
>
> /Patrik
> lör 4 feb. 2017 kl. 16:58 skrev Dai Yinhua <yhdai...@gmail.com 
> <javascript:>>:
>
>> Hi team,
>>
>> What is the graceful method to shutdown akka cluster?
>> If I have an akka cluster with 20 nodes and each nodes starts 3 jvm 
>> process for actorsystem.
>> How can I gracefully shutdown the whole cluster for upgrading.
>>
>> Thank you.
>>
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