[jira] [Comment Edited] (CASSANDRA-14749) Collection Deletions for Dropped Columns in 2.1/3.0 mixed-mode can delete rows

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

    [ https://issues.apache.org/jira/browse/CASSANDRA-14749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16613795#comment-16613795 ] 

Benedict edited comment on CASSANDRA-14749 at 9/13/18 5:08 PM:
---------------------------------------------------------------

-Good job I did (split this out) - this time, Aleksey pointed out the {{getDroppedColumn}} invokes another method {{getDroppedColumn(name, isStatic)}} with a default parameter of {{false}} for {{isStatic}}-  (That's what I get for not refreshing the page)

I've pushed an update, but I think the defaulting variant of {{getDroppedColumn}} probably shouldn't exist.


was (Author: benedict):
Good job I did (split this out) - this time, Aleksey pointed out the {{getDroppedColumn}} invokes another method {{getDroppedColumn(name, isStatic)}} with a default parameter of {{false}} for {{isStatic}}

I've pushed an update, but I think the defaulting variant of {{getDroppedColumn}} probably shouldn't exist.

> Collection Deletions for Dropped Columns in 2.1/3.0 mixed-mode can delete rows
> ------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-14749
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14749
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Benedict
>            Assignee: Benedict
>            Priority: Major
>             Fix For: 3.0.18
>
>
> Similar to CASSANDRA-14568, if a 2.1 node sends a response to a 3.0 node containing a deletion for a dropped collection column, instead of deleting the collection, we will delete the row containing the collection.
>  
> This is an admittedly unlikely cluster state but, during such a state, a great deal of data loss could happen.



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