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https://issues.apache.org/jira/browse/IMPALA-8473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fredy Wijaya resolved IMPALA-8473.
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Resolution: Fixed
Fix Version/s: Impala 3.3.0
> Refactor lineage publication mechanism to allow for different consumers
> -----------------------------------------------------------------------
>
> Key: IMPALA-8473
> URL: https://issues.apache.org/jira/browse/IMPALA-8473
> Project: IMPALA
> Issue Type: Sub-task
> Components: Backend, Frontend
> Reporter: radford nguyen
> Assignee: radford nguyen
> Priority: Critical
> Fix For: Impala 3.3.0
>
> Attachments: ImpalaPostExecHook-infra.patch
>
>
> Impetus for this change is to allow lineage to be consumed by Atlas via Kafka.
> h3. Design Proposal
> Implement a plugin approach (similar to {{authorization_provider}}) for
> consuming query event hooks, where downstream users can provide their own
> hook implementations as runtime dependencies.
> Keep but deprecate existing lineage event file writing.
> [~mad...@apache.org] has provided a fe patch (attached) with suggested
> mechanism for allowing multiple hooks to be registered with the fe. Hooks
> would be invoked from the be at appropriate places, e.g.
> [https://github.com/apache/impala/blob/c1b0a073938c144e9bf33901bd4df6dcda0f09ec/be/src/service/impala-server.cc#L466].
> The hooks should all be executed asynchronously, so the current thinking is
> that this execution should happen in the fe, since the be does not know about
> what hooks are registered. IOW, the
> {{ImpalaPostExecHookFactory.executeHooks}} method (see patch) should probably
> make use of a thread-pool executor service (or something similar) in order to
> execute all hooks in parallel and in a non-blocking manner, returning to the
> be asap.
>
> h3. Code Review
> [https://gerrit.cloudera.org/#/c/13352/]
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