[jira] [Updated] (CASSANDRA-9743) Fix merging of rows in PartitionUpdate

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-9743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Yeschenko updated CASSANDRA-9743:
-----------------------------------------
    Summary: Fix merging of rows in PartitionUpdate  (was: RowUpdateBuilder is broken for maps and lists)

> Fix merging of rows in PartitionUpdate
> --------------------------------------
>
>                 Key: CASSANDRA-9743
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9743
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Aleksey Yeschenko
>            Assignee: Sylvain Lebresne
>             Fix For: 3.0 beta 1
>
>         Attachments: 9743.txt
>
>
> Something's not right with {{RowUpdateBuilder}} when adding map or list entries. It breaks {{SELECT}} queries that follow afterwards, inflating the resultset, and duplicating the rows multiple times.
> It manifests when a table has more than one collection, and we update them both with more than one item.
> Here is a gist with minimal reproducible code: https://gist.github.com/iamaleksey/b6e9476fece029067729
> The bug is currently blocking CASSANDRA-6717 code for migration from old schema keyspace to a new one.
> P.S. I'm assuming that the bug is in {{RowUpdateBuilder}} because I couldn't reproduce in cqlsh. Could be that something's broken in the iterators, but trying to debug a cascade of them failed me.



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