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https://issues.apache.org/jira/browse/CASSANDRA-8123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172417#comment-14172417
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Aleksey Yeschenko commented on CASSANDRA-8123:
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It's supposed to cover the previous values with a range tombstone, so you
wouldn't append. However, if you execute them truly concurrently, there isn't
much we can do, since for the two concurrent inserts they'll write the same
range tombstone with the same timestamp, that won't overwrite each other.
How concurrent are we talking here?
> List appends when inserting in the same value
> ---------------------------------------------
>
> Key: CASSANDRA-8123
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8123
> Project: Cassandra
> Issue Type: Bug
> Environment: C* 2.1.0 and C* 2.0.10
> Reporter: Jorge Bay
> Priority: Minor
>
> List append when inserting in the same value
> I'm getting list appends when executing multiple times concurrently an INSERT
> (or update) of a list column value on the same partition:
> "INSERT INTO cf1 VALUES (id, list_sample) VALUES (id1, ['one', 'two']);"
> It could result into a list with the values appended: ['one', 'two', 'one',
> 'two', ...]
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