Hi Justin, No, I am trying to find where and when should I add the "Down" logic. So I am trying to understand what would happen before I add the "Down" logic.
On Friday, 26 May 2017 20:38:37 UTC+8, Justin du coeur wrote: > > Clarifying question: are you doing downing somewhere in this? > > The naive auto-down feature shouldn't be used because it is *too* naive, > and leads to split-brain when you get transient network failures. But you > do still have to down nodes *somehow* when they crash, so that the system > knows to readjust accordingly... > > On Fri, May 26, 2017 at 4:52 AM, Dai Yinhua <yhdai...@gmail.com > <javascript:>> wrote: > >> I am using *akka cluster sharding *to build a long running calculation >> service, and I have set auto-down to false. >> And we have mechanism that *when one jvm get crashed it will be >> restarted immediately* by some external monitoring tools. >> >> I would like to confirm below behaviors when some jvm get crashed: >> >> Two cases: >> >> 1. *If the crashed jvm is seed node*, and the jvm is restarted >> immediately >> Is this the an expected result: >> 1.1) Other nodes see seed node as unreachable >> 1.2) One from other node become the new leader, but it can not >> perform any duty >> 1.3) Seed node restarted, and join it self >> *Seems in this case the cluster was partitioned to two?* >> How should I deal with this situation? >> >> 2. *If the crashed jvm is not seed node but a shard region node*, and >> the jvm is restarted immediately >> Before crash, the jvm contains some shards and have some entity actors >> running. >> Is this the an expected result: >> 2.1) The crashed node marked as unreachable >> 2.2) Leader can not performance any operation from now >> 2.3) A new instance is trying to join the cluster, and succeed >> 2.4) The jvm marked as up >> 2.5) Leader become available again >> Question: >> Will the *entities *that running in the crashed jvm be *moved to >> other available node automatically *after the crash happened? >> What if the *shard coordinator* happened to be running in the >> crashed jvm? >> >> Thank you. >> >> -- >> >>>>>>>>>> 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+...@googlegroups.com <javascript:>. >> To post to this group, send email to akka...@googlegroups.com >> <javascript:>. >> Visit this group at https://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/d/optout. >> > > -- >>>>>>>>>> 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.
