No, it needs to be Downed. On Tue, Apr 4, 2017 at 9:50 AM, Unmesh Joshi <unmeshjo...@gmail.com> wrote:
> Hi, > > If I restart the crashed node on same host and port, it should be > reachable now and consensus should be reached isnt it? > > Thanks, > Unmesh > > On Tuesday, 4 April 2017 13:09:22 UTC+5:30, Michal Borowiecki wrote: >> >> Hi Unmesh, >> >> AFAIK, the crashed node has to be downed (whether manually or >> automatically) for the cluster to reach convergence. >> >> Only once there are no unreachable nodes observed by any member can the >> leader resume it's duties and allow the new member (your re-started >> instance) to join. >> >> For testing & dev, you can use auto-downing. For production you need to >> choose a more resilient approach I'm afraid, as out of the box auto-downing >> doesn't provide a way to address the split-brain-problem which most likely >> would bite you in a real life environment sooner or later. >> >> Cheers, >> >> Michal >> >> On 04/04/17 08:31, Unmesh Joshi wrote: >> >> Is it possibly because in a two node cluster, there can never be majority >> ( > 50%) nodes agreeing on membership to mark a node as 'seen'? >> >> On Tuesday, 4 April 2017 12:46:17 UTC+5:30, Unmesh Joshi wrote: >>> >>> Hi, >>> >>> I have a two node cluster in a cluster. If I crash one of the nodes >>> (*10.131.22.26:3552 >>> <http://10.131.22.26:3552>), *and bring it up again, I start getting >>> following messages from other nodes. Now that the node is reachable and >>> there are only two nodes in the cluster, why should it give following >>> message with seen=false for 1*0.131.22.26:3552 >>> <http://0.131.22.26:3552>? * >>> For members to be seen, is there any other configuration that needs to >>> be tuned? >>> >>> >>> [INFO] [04/04/2017 12:38:49.623] >>> [csw-cluster-akka.actor.default-dispatcher-14] >>> [akka.cluster.Cluster(akka://csw-cluster)] Cluster Node [akka.tcp:// >>> csw-cluster@10.131.22.26:41574] - Leader can currently not perform its >>> duties, reachability status: [akka.tcp://csw-cluster@10.131.22.26:41574 >>> -> akka.tcp://csw-cluster@10.131.22.26:3552: Unreachable [Unreachable] >>> (1)], member status: [akka.tcp://csw-cluster@10.131.22.26:3552 Up >>> seen=false, akka.tcp://csw-cluster@10.131.22.26:41574 Up seen=true] >>> [INFO] [04/04/2017 12:39:49.634] >>> [csw-cluster-akka.actor.default-dispatcher-2] >>> [akka.cluster.Cluster(akka://csw-cluster)] Cluster Node [akka.tcp:// >>> csw-cluster@10.131.22.26:41574] - Leader can currently not perform its >>> duties, reachability status: [akka.tcp://csw-cluster@10.131.22.26:41574 >>> -> akka.tcp://csw-cluster@10.131.22.26:3552: Unreachable [Unreachable] >>> (1)], member status:* [akka.tcp://csw-cluster@10.131.22.26:3552 >>> <http://csw-cluster@10.131.22.26:3552> Up seen=false*, akka.tcp:// >>> csw-cluster@10.131.22.26:41574 Up seen=true] >>> [INFO] [04/04/2017 12:40:49.632] >>> [csw-cluster-akka.actor.default-dispatcher-17] >>> [akka.cluster.Cluster(akka://csw-cluster)] Cluster Node [akka.tcp:// >>> csw-cluster@10.131.22.26:41574] - Leader can currently not perform its >>> duties, reachability status: [akka.t >>> >>> >>> >>> Thanks, >>> Unmesh >>> >> -- >> >>>>>>>>>> Read the docs: http://akka.io/docs/ >> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c >> urrent/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 akka-user+...@googlegroups.com. >> To post to this group, send email to akka...@googlegroups.com. >> Visit this group at https://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> <http://www.openbet.com/> Michal Borowiecki >> Senior Software Engineer L4 >> T: +44 208 742 1600 <+44%2020%208742%201600> >> >> >> +44 203 249 8448 <+44%2020%203249%208448> >> >> >> >> E: michal.b...@openbet.com >> W: www.openbet.com >> OpenBet Ltd >> >> Chiswick Park Building 9 >> >> 566 Chiswick High Rd >> >> London >> >> W4 5XT >> >> UK >> <https://www.openbet.com/email_promo> >> This message is confidential and intended only for the addressee. 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GB927523612 >> > -- > >>>>>>>>>> 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 akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at https://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- Cheers, √ -- >>>>>>>>>> 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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