Hello! 1. if gc time > failureDetectionTimeout. 2. No, NODE_SEGMENTED is reserved for case where node is excluded from cluster, alone, and not able to function as a single-node cluster (explicitly removed from cluster). 3. I've never seen splitting into two clusters. 4. Perhaps, but see above.
Regards, -- Ilya Kasnacheev чт, 2 июл. 2020 г. в 13:45, bbweb <bb...@sohu.com>: > Hi, > > we are considering ignite for mission critical system and concerning > about node segmentation and split brain problem. I searched for current > documents and suggestions but still have some questions in the following, > please help and thanks in advance: > > > > 1、For long gc case , when a node has long gc and after gc is done, what's > the heartbeat check and rejoin sequence for this node and when will this > node be judged as segmented? > > > > 2、It seems sometimes EVT_NODE_SEGMENTED is reported from segmented node. > When will EVT_NODE_SEGMENTED event be fired and what's the further > action? SegmentationPolicy defines what happens when segmentation occurs. > The default value is STOP。Does this mean that even no segmentation plugin > is defined, behavior can still be controlled(like stop or restart) using > SegmentationPolicy for EVT_NODE_SEGMENTED ? > > > 3、If there is network issue like switch outage which cause one cluster be > splitted to 2 clusters, will node segmentation be reported and > EVT_NODE_SEGMENTED event be fired? Does this related to node number in the > cluster, e.g if this is only one node isolated then this event is possible > to be fired and if the splitted cluster has at least 2 nodes then no event > will be fired and this two splitted cluster can both provide service which > cause split brain? In out test, actually short time network outage can > generate even one node cluster and this node can still provide service, no > segmentation event is reported. > > > 4、Can ZooKeeper resolve all this kind of issues including long GC or > short-time network outage? > > > 5、As ZooKeeper is for big cluster, for small cluster can plugin resolve > all cases? I looked at some implentation including gridgain's paid verion, > different plugins checks for node access, port access and shared first > sytem but is seems it's difficult for some cases like GC as in this case > the host is still reacheable but ignite node is not reachable for > sometime, so what's the suggestions for plugin that can resolve all cases? > > Thanks! > > > > > > <https://a.app.qq.com/o/simple.jsp?pkgname=com.sohu.mail.client.cordova> > > > >
