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https://issues.apache.org/jira/browse/CASSANDRA-14517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16511271#comment-16511271
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Blake Eggleston commented on CASSANDRA-14517:
---------------------------------------------
It doesn't break the guarantee on the write path, partitions are still updated
atomically internally. It breaks on the read path though, since an SRP can
create a read response which contains a torn write.
> Short read protection can cause partial updates to be read
> ----------------------------------------------------------
>
> Key: CASSANDRA-14517
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14517
> Project: Cassandra
> Issue Type: Bug
> Reporter: Blake Eggleston
> Priority: Major
> Fix For: 4.0
>
>
> If a read is performed in two parts due to short read protection, and the
> data being read is written to between reads, the coordinator will return a
> partial update. Specifically, this will occur if a single partition batch
> updates clustering values on both sides of the SRP break, or if a range
> tombstone is written that deletes data on both sides of the break. At the
> coordinator level, this breaks the expectation that updates to a partition
> are atomic, and that you can’t see partial updates.
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