Hi Roland, The cluster is based on https://github.com/wandoulabs/spray-socketio. We, Wandou Labs ( http://www.snappea.com/ ), are going to use it for at least 10+ millions persistent connections, from mobile devices to our service. These mobile devices can then, share status, push messages, fire real-time events, virtually connect to each others etc.
Feel free for more questions :-) Regards, Caoyuan Deng ( https://github.com/dcaoyuan ) On Tuesday, August 26, 2014 10:10:27 PM UTC+8, rkuhn wrote: > > Hi Caoyuan, > > 26 aug 2014 kl. 09:51 skrev Caoyuan <[email protected] <javascript:>>: > > > > On Monday, August 25, 2014 6:31:15 PM UTC+8, Akka Team wrote: >> >> Hi Caouyan, >> >> It is usually dangerous to set the heartbeat-pause to a lesser value than >> the heartbeat interval itself. If a heartbeat gets lost, then the next >> heartbeat will definitely not make the deadline. I recommend to set it to a >> larger value. Also, I would go with a lower heartbeat-interval setting, 10s >> seems more appropriate if you want low heartbeat traffic. >> >> -Endre >> > > Got it now. Thanks. > > BTW, Our cluster has ran 15 days with 1 million long-connections, stable > and consistent. > > > That’s great to hear, and it does make me a bit curious about the rest of > the story: care to share it privately or even publicly? > > Regards, > > Roland > > > >> >> >> On Mon, Aug 25, 2014 at 9:31 AM, Caoyuan <[email protected]> wrote: >> >>> Update Aug 25, 2014: >>> >>> We changed >>> akka.remote.transport-failure-detector.acceptable-heartbeat-pause = 10 s >>> instead of 5 s, the WARN message gone. I guess the [Disassociated] WARN >>> might be caused by network delay or GC pause (Full GC lasts 3+ secs now on >>> our system) etc. The setting is >>> >>> akka.remote { >>> transport-failure-detector { >>> heartbeat-interval = 30 s # default 4s >>> acceptable-heartbeat-pause = 10 s # default 10s >>> } >>> } >>> >>> But, that could not explain the periodic "Disassociated" WARN occurred >>> before, which, seems could not be recovered from Disassociated state. >>> >>> On Monday, August 11, 2014 12:08:00 AM UTC+8, Caoyuan wrote: >>>> >>>> We have an akka cluster with 10 nodes. it works almost smoothly except >>>> periodic firing "Disassociated" WARN log, which seems cannot be recovered: >>>> >>>> The following is the log records. >>>> >>>> ...... >>>> 2014-08-10 00:00:09,253 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> >>>> 2014-08-10 00:00:44,292 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> >>>> 2014-08-10 00:01:49,332 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> >>>> 2014-08-10 00:02:24,373 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> >>>> 2014-08-10 00:02:59,412 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> >>>> 2014-08-10 00:03:34,452 WARN a.remote.ReliableDeliverySupervisor >>>> akka.tcp://[email protected]:2551/system/endpointManager/ >>>> reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem% >>>> 4010.0.65.3%3A2552-5 - Association with remote system [akka.tcp:// >>>> [email protected]:2552] has failed, address is now gated for >>>> [5000] ms. Reason is: [Disassociated]. >>>> ...... >>>> >>>> >>>> The warning continually occurred almost all day, with the period 35 >>>> seconds (30 + 5 s) or 65 seconds (30 + 30 + 5 s), which is exactly the >>>> setting of akka.remote's transport failure detector: >>>> >>>> akka.remote { >>>> transport-failure-detector { >>>> heartbeat-interval = 30 s # default 4s >>>> acceptable-heartbeat-pause = 5 s # default 10s >>>> } >>>> >>>> Where, the failure-detector mark it unavailable after heartbeat-interval >>>> + acceptable-heartbeat-pause period (35 s). >>>> >>>> We're using akka-2.3.3. the node which logged is at 10.0.69.169:2551, >>>> and the remote node is at 10.0.65.3:2552 >>>> >>>> I tried to dig via the akka.remoting source code, but with no >>>> progressing. >>>> >>>> Thoughts ? >>>> >>>> -Caoyuan Deng >>>> >>>> >>> -- >>> >>>>>>>>>> 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 >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Akka User List" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/akka-user. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Akka Team >> Typesafe - The software stack for applications that scale >> Blog: letitcrash.com >> Twitter: @akkateam >> > > -- > >>>>>>>>>> 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 > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > To post to this group, send email to [email protected] > <javascript:>. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > > > > > *Dr. Roland Kuhn* > *Akka Tech Lead* > Typesafe <http://typesafe.com/> – Reactive apps on the JVM. > twitter: @rolandkuhn > <http://twitter.com/#!/rolandkuhn> > > -- >>>>>>>>>> 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 --- You received this message because you are subscribed to the Google Groups "Akka User List" group. 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