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https://issues.apache.org/jira/browse/IGNITE-8035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ruslan Gilemzyanov reopened IGNITE-8035:
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> Duplicated events with type CREATED in ContinuousQuery's Events Listener
> -------------------------------------------------------------------------
>
> Key: IGNITE-8035
> URL: https://issues.apache.org/jira/browse/IGNITE-8035
> Project: Ignite
> Issue Type: Bug
> Components: cache
> Affects Versions: 2.4
> Reporter: Ruslan Gilemzyanov
> Assignee: Nikolay Izhikov
> Priority: Major
>
> We faced with bug in ContinuousQuery's EventListener work in Ignite. I wrote
> sample project to demonstrate it.
> We started 2 server nodes connected to the one cache.
> Topology snapshot became [ver=2, servers=2, clients=0, CPUs=4, heap=3.6GB]
> I have put elements in cache (about 50 elements). Elements were distributed
> between two nodes approxiamtely in the same amount.
> After pushing every element to cache we waited 100ms (to ensure that Listener
> did his work) and deleted element from cache.
> Then we stopped one node. (Topology snapshot became [ver=3, servers=1,
> clients=0, CPUs=4, heap=1.8GB])
> And then some absolutely randomly chosen (deleted from cache to this moment)
> events came to other working node with status CREATED (Remind you that we
> deleted them from cache to this moment). In our case it was 5 events.
> I think this is direct violation of Continuous Query's "exactly once
> delivery" contract.
> Source code is here: [https://github.com/ruslangm/ignite-sample]
>
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