Adding the ability to register a PeerFinderListener to Coordinator #88626
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One question I have is whether this is granular enough. For example, when a master node steps down and a new one is elected,
For #88562 I only care about the first one. It's possible the others could have uses too. |
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@DaveCTurner does this look like what you had in mind when we talked? |
masseyke
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DaveCTurner
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Jul 21, 2022
| @@ -147,7 +147,7 @@ void logBootstrapState(Metadata metadata) { | |||
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| } | |||
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| void onFoundPeersUpdated() { | |||
| public void onFoundPeersUpdated() { | |||
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| public void onFoundPeersUpdated() { | |
| @Override | |
| public void onFoundPeersUpdated() { |
elasticsearchmachine
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Pinging @elastic/es-distributed (Team:Distributed) |
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Hi @masseyke, I've created a changelog YAML for you. |
weizijun
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Jul 22, 2022
* upstream/master: (40 commits) Fix CI job naming [ML] disallow autoscaling downscaling in two trained model assignment scenarios (elastic#88623) Add "Vector Search" area to changelog schema [DOCS] Update API key API (elastic#88499) Enable the pipeline on the feature branch (elastic#88672) Adding the ability to register a PeerFinderListener to Coordinator (elastic#88626) [DOCS] Fix transform painless example syntax (elastic#88364) [ML] Muting InternalCategorizationAggregationTests testReduceRandom (elastic#88685) Fix double rounding errors for disk usage (elastic#88683) Replace health request with a state observer. (elastic#88641) [ML] Fail model deployment if all allocations cannot be provided (elastic#88656) Upgrade to OpenJDK 18.0.2+9 (elastic#88675) [ML] make bucket_correlation aggregation generally available (elastic#88655) Adding cardinality support for random_sampler agg (elastic#86838) Use custom task instead of generic AckedClusterStateUpdateTask (elastic#88643) Reinstate test cluster throttling behavior (elastic#88664) Mute testReadBlobWithPrematureConnectionClose Simplify plugin descriptor tests (elastic#88659) Add CI job for testing more job parallelism [ML] make deployment infer requests fully cancellable (elastic#88649) ...
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This came out of #88562. The problem there is that if we are a non-master-eligible node we want to start polling a master-eligible node whenever we realize that there is no elected master. We are notified that there is no elected master in a
ClusterChangedEvent. We get the list of master-eligible nodes fromPeerFinder#getFoundPeers. However at that the time that we are notified of theClusterChangeEvent,PeerFinder#getFoundPeersreturns an emptyIterable. That collection is populated in another thread, and there is currently no way to get notified of when it is populated. This PR adds the ability to register aPeerFinderListenerwithCoordinator. The listener has anonFoundPeersUpdatedthat is called whenever the collection of peers changes (whether added to or removed from).