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https://issues.apache.org/jira/browse/CASSANDRA-21160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18091937#comment-18091937
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Caleb Rackliffe commented on CASSANDRA-21160:
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[~arvindk12] Sorry it took so long for me to get back to this!
I think the easiest thing to do would be to add {{synchronized}} to the
signature of {{updateKeyBounds()}}. That should protect the access from both
{{index()}} and {{update()}}. I'll put up a quick patch...
> VectorMemoryIndex has unnecessary synchronization on the add method
> -------------------------------------------------------------------
>
> Key: CASSANDRA-21160
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21160
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Feature/Vector Search
> Reporter: Michael Marshall
> Priority: Normal
> Fix For: 5.0.x, 6.x, 7.x
>
>
> The `VectorMemoryIndex` supports asynchronous additions to the graph.
> However, the `synchronous` keyword for the `add` method prevents this and
> therefore means we are adding a point of contention that is unnecessary.
> As part of this ticket, we should verify my understanding that writes can be
> concurrent and then drop the keyword.
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