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From "Aleksey Yeschenko (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-9299) Fix counting of tombstones towards TombstoneOverwhelmingException
Date Thu, 02 Jul 2015 12:18:04 GMT


Aleksey Yeschenko commented on CASSANDRA-9299:

bq. but it's strange because before 2.1.6 we were receiving reports with few thousands of
tombstones and after there are none.

Before 2.1.6 tombstones were being counted wrongly (overcounted), that's all.

> Fix counting of tombstones towards TombstoneOverwhelmingException
> -----------------------------------------------------------------
>                 Key: CASSANDRA-9299
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Aleksey Yeschenko
>            Assignee: Aleksey Yeschenko
>             Fix For: 2.0.15, 2.1.6
>         Attachments: 9299-2.0.txt, 9299-2.1.txt, 9299-trunk.txt
> CASSANDRA-6042 introduced warning on too many tombstones scanned, then CASSANDRA-6117
introduced a hard TombstoneOverwhelmingException condition.
> However, at least {{SliceQuerFilter.collectReducedColumn()}} seems to have the logic
wrong. Cells that are covered by a range tombstone or a partition high level deletion, still
count towards {{ColumnCounter}}'s {{ignored}} register.
> Thus it's possible to have an otherwise healthy (though large) dropped partition read
cause an exception that shouldn't be there.
> The only things that should count towards the exception are cell tombstones and range
tombstones (CASSANDRA-8527), but never ever live cells shadowed by any kind of tombstone.

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