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path: root/releasenotes/notes/remove-global-result-event-queue-f00bf6e4dab2720a.yaml
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* Switch to ZooKeeper backed NodesProvisionedEventsFelix Edel2021-07-131-0/+3
This puts the NodesProvisionedEvents into ZooKeeper. With this, all result events are now in ZooKeeper. To make the NodesProvisionedEvent serializable, we cannot store the whole NodeRequest object in the event anymore. Instead we are using the request.id, job name and the buildset UUID to look up the corresponding NodeRequest object from the buildset when the NodesProvisionedEvent is handled. As a result of this we have to find a way to return the NodeSet even in case the NodeRequest or the buildset cannot be found anymore (e.g. due to a gate reset). In this case we look up the NodeRequest directly from ZooKeeper and provide a faked NodeSet which allows us to retrieve the node information from Zookeeper (via the update mechanism of the NodeRequest in the Nodepool client). Finally, we can get rid of the local result event queue in the scheduler as now all result events are in ZooKeeper. Together with that the `zuul.scheduler.eventqueues.result` gauge was also removed. Change-Id: Ib5e0f13d25a21ebad908d38f0201e92b704a1c85