On Wed, Mar 25, 2015 at 8:59 AM, Marek Żebrowski <[email protected]>
wrote:
> I'm trying to run small cluster, just 3 nodes on EC2.
> I configured dispatchers and increased threshold for failure detector as
> recommended
>
> {
>
> cluster {
> use-dispatcher = cluster-dispatcher
> failure-detector {
> threshold = 12
> }
> auto-down-unreachable-after = 10s
> retry-unsuccessful-join-after = 5s
> }
> }
>
> cluster-dispatcher {
> type = "Dispatcher"
> executor = "fork-join-executor"
> fork-join-executor {
> parallelism-min = 2
> parallelism-max = 4
> }
> }
>
>
>
>
>
> but even tough my nodes are under light load I observe about 600-800
> UNREACHABLE events
>
> WARN a.c.ClusterCoreDaemon: Cluster Node [akka.tcp://
> [email protected]:2552] - Marking node(s) as UNREACHABLE
> [Member(address = akka.tcp:// [email protected]:2555, status = Up)]
>
> a day, and occasional quarantaines.
>
>
> I'd be grateful for recommendations about running akka cluster on EC2
>
>
First thing you should try is to increase the
akka.cluster.failure-detector.acceptable-heartbeat-pause to for example
10s. Default is 3s.
Have you monitored garbage collection? Any long gc pauses?
What does your application do "under light load"? Sending any large remote
messages? Sending many remote messages without flow control?
Regards,
Patrik
>
>
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--
Patrik Nordwall
Typesafe <http://typesafe.com/> - Reactive apps on the JVM
Twitter: @patriknw
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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