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From "Yuki Morishita (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7810) tombstones gc'd before being locally applied
Date Fri, 22 Aug 2014 21:36:11 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107538#comment-14107538
] 

Yuki Morishita commented on CASSANDRA-7810:
-------------------------------------------

So this is broken since we removed PreCompactedRow(CASSANDRA-6142).
In LazilyCompactedRow, gcable RangeTombstone is just thrown away without removing cells it
covers.

> tombstones gc'd before being locally applied
> --------------------------------------------
>
>                 Key: CASSANDRA-7810
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7810
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: 2.1.0.rc6
>            Reporter: Jonathan Halliday
>            Assignee: Marcus Eriksson
>             Fix For: 2.1.0
>
>         Attachments: range_tombstone_test.py
>
>
> # single node environment
> CREATE KEYSPACE test WITH replication = {'class': 'SimpleStrategy', 'replication_factor':
1 };
> use test;
> create table foo (a int, b int, primary key(a,b));
> alter table foo with gc_grace_seconds = 0;
> insert into foo (a,b) values (1,2);
> select * from foo;
> -- one row returned. so far, so good.
> delete from foo where a=1 and b=2;
> select * from foo;
> -- 0 rows. still rainbows and kittens.
> bin/nodetool flush;
> bin/nodetool compact;
> select * from foo;
>  a | b
> ---+---
>  1 | 2
> (1 rows)
> gahhh.
> looks like the tombstones were considered obsolete and thrown away before being applied
to the compaction?  gc_grace just means the interval after which they won't be available to
remote nodes repair - they should still apply locally regardless (and do correctly in 2.0.9)



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