[Zen2] Introduce LeaderChecker #33024
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It is important that follower nodes periodically check that their leader is still healthy and that they remain part of its cluster. If these checks fail repeatedly then followers should attempt to find and join a new leader, possibly electing one in the process. The LeaderChecker, introduced in this commit, performs these periodic checks and deals with retries.
DaveCTurner
added
>enhancement
v7.0.0
:Distributed/Cluster Coordination
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Pinging @elastic/es-distributed |
61 tasks
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Failed CI because of #29880. @elasticmachine test this please. @ywelsch this failed CI for unrelated reasons, and is ready for a review. |
ywelsch
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Sep 18, 2018
server/src/main/java/org/elasticsearch/cluster/coordination/LeaderChecker.java
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It is important that follower nodes periodically check that their leader is
still healthy and that they remain part of its cluster. If these checks fail
repeatedly then followers should attempt to find and join a new leader,
possibly electing one in the process. The LeaderChecker, introduced in this
commit, performs these periodic checks and deals with retries.