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https://issues.apache.org/jira/browse/CASSANDRA-9282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535373#comment-14535373
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Jonathan Ellis commented on CASSANDRA-9282:
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Building an extra Set with string concatenation (maybe use Pair instead?)
sounds expensive. Which would be fine if we were only counting them for "bad"
statements but the problem is that you don't get the "are these mutations in
the same partition" division for free that you did in the last place.
> Warn on unlogged batches
> ------------------------
>
> Key: CASSANDRA-9282
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9282
> Project: Cassandra
> Issue Type: Bug
> Components: API
> Reporter: Jonathan Ellis
> Assignee: T Jake Luciani
> Fix For: 2.1.x
>
>
> At least until CASSANDRA-8303 is done and we can block them entirely, we
> should log a warning when unlogged batches across multiple partition keys are
> used. This could either be done by backporting NoSpamLogger and blindly
> logging every time, or we could add a threshold and warn when more than 10
> keys are seen.
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