Auto rejoin after network failure?


One of Sematext's customers recently had a few nodes get separated from the
rest of the cluster due to a network issue.
We don't have all the info yet, but it looks like the separated nodes
didn't join the original cluster on their own after the network has been
fixed, even though they didn't end up electing a master amongst themselves
(because there were too few of them).

So, a couple of questions:

  1. Do you consider a set of masterless nodes a cluster? Would you call it
    "a cluster" in ES context? Just curious if there should be a distinction
    between a true cluster with the master and a set of masterless nodes.

  2. If the network was fixed after a while, should the separated masterless
    nodes not have rejoined the cluster automatically? Even if the network was
    down for a long time?

  3. When nodes leave the cluster and find themselves floating around without
    a master, do they continuously scream "Can you hear me, major Tom?", or
    do they give up after a while and switch to the "Here am I sitting in a tin
    can far above the world, Planet Earth is blue and there's nothing I can do"


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