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https://issues.apache.org/jira/browse/IGNITE-20536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Uttsel updated IGNITE-20536:
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Ignite Flags: (was: Docs Required,Release Notes Required)
> No-op handlers for StripedDisruptor.StripeEntryHandler#subscribers
> ------------------------------------------------------------------
>
> Key: IGNITE-20536
> URL: https://issues.apache.org/jira/browse/IGNITE-20536
> Project: Ignite
> Issue Type: Bug
> Reporter: Sergey Uttsel
> Priority: Major
> Labels: ignite-3
>
> h3. Motivation
> In https://issues.apache.org/jira/browse/IGNITE-20397 we discussed that it is
> possible to get null handler in StripedDisruptor.StripeEntryHandler#onEvent
> on a table drop. And we start to use a log warning instead of an assert.
> But this is not the best solution. We still need to assert that handler is
> not null on first event for the partition. And we need to skip events if the
> partition was removed. So we need:
> # to add assert that `handler != null`,
> # on StripedDisruptor.StripeEntryHandler#unsubscribe put a no-op handler to
> a subscribers map instead of remove it,
> # to remove the no-op handler when there are no events for this handler.
> h3. Definition of done:
> # assert that `handler != null` is added,
> # no-op handler on StripedDisruptor.StripeEntryHandler#unsubscribe,
> # remove handler when it is not needed.
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