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[7.x] Handle master failure in NodeSeenService (#77220) #77527

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merged 1 commit into from
Sep 9, 2021

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@gwbrown gwbrown commented Sep 9, 2021

Backports the following commits to 7.x:

* Handle master failure in NodeSeenService

NodeSeenService can miss seeing nodes if the master changes while it's
processing the cluster state update which adds the nodes to the cluster.
This caused occasional test failures in the test intended to check that
NodeSeenService is working as intended.

This commit adjusts NodeSeenService's early returns to ensure that, if
the master changed, the new master checks for seen nodes even if nodes
were not added in that particular cluster state update.

* Clarify & correct "just-became-master" check

* Remove leftover debug logging (d'oh!)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
@gwbrown gwbrown added auto-merge-without-approval Automatically merge pull request when CI checks pass (NB doesn't wait for reviews!) backport labels Sep 9, 2021
@elasticsearchmachine elasticsearchmachine merged commit 3d1f823 into elastic:7.x Sep 9, 2021
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