6943a3101f
Today `GatewayMetaState` implements `PersistedState` but it's an error to use it as a `PersistedState` before it's been started, or if the node is master-ineligible. It also holds some fields that are meaningless on nodes that do not persist their states. Finally, it takes responsibility for both loading the original cluster state and some of the high-level logic for writing the cluster state back to disk. This commit addresses these concerns by introducing a more specific `PersistedState` implementation for use on master-eligible nodes which is only instantiated if and when it's appropriate. It also moves the fields and high-level persistence logic into a new `IncrementalClusterStateWriter` with a more appropriate lifecycle. Follow-up to #46326 and #46532 Relates #47001 |
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