Atri Sharma created LUCENE-8963:
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Summary: Allow Collectors To "Publish" If They Can Be Used In
Concurrent Search
Key: LUCENE-8963
URL: https://issues.apache.org/jira/browse/LUCENE-8963
Project: Lucene - Core
Issue Type: Improvement
Reporter: Atri Sharma
There is an implied assumption today that all we need to run a query
concurrently is a CollectorManager implementation. While that is true, there
might be some corner cases where a Collector's semantics do not allow it to be
concurrently executed (think of ES's aggregates). If a user manages to write a
CollectorManager with a Collector that is not really concurrent friendly, we
could end up in an undefined state.
This Jira is more of a rhetorical discussion, and to explore if we should allow
Collectors to implement an API which simply returns a boolean signifying if a
Collector is parallel ready or not. The default would be true, until a
Collector explicitly overrides it?
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