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https://issues.apache.org/jira/browse/CASSANDRA-8185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182968#comment-14182968
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Aleksey Yeschenko commented on CASSANDRA-8185:
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Yes. The change is CASSANDRA-6782, and it was intentional (read its description
and comments for the reasoning behind the change).
> Removing the last item from a collection removes the entire row
> ---------------------------------------------------------------
>
> Key: CASSANDRA-8185
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8185
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Mac OS X Yosemite
> JDK 8u25
> Reporter: Stuart Gunter
> Priority: Minor
>
> When removing the last item from a list or set (and I assume the same applies
> to maps), the entire row is deleted rather than just that last item.
> I've only tested this in cases where the collection column is the only non-PK
> column, but it is definitely a change between v2.0.5 and v2.0.6. I've looked
> through the 2.0.6 release notes and issues and can't find any item that might
> describe this, so I assume it's not an intended change. If such an issue
> exists, I've probably just missed it, so apologies in advance.
> I've created a very simple project to reproduce the issue. If you clone the
> repo and run it in two different modes (the README explains how to do this
> with preconfigured Maven profiles), you will see the tests that pass on
> v2.0.5 and fail on v2.0.6.
> Repo: https://github.com/stuartgunter/cassandra-2.0.6-bug
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