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https://issues.apache.org/jira/browse/CASSANDRA-14462?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Fabien Rousseau reassigned CASSANDRA-14462:
-------------------------------------------
Assignee: Fabien Rousseau
> CAS temporarily broken on reversed tables after upgrading on 2.1.X or 2.2.X
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-14462
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14462
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Fabien Rousseau
> Assignee: Fabien Rousseau
> Priority: Major
> Attachments: 14662-2.1-2.2.patch
>
>
> Issue CASSANDRA-12127 changed the way the reversed comparator behaves. Before
> scrubbing tables with reversed clustering keys, requests with CAS won't apply
> (even if the condition is true).
> Below is a simple scenario to reproduce it:
> - use C* 2.1.14/2.2.6
> - create the schema
> {code:java}
> CREATE KEYSPACE IF NOT EXISTS test_ks WITH replication = {'class':
> 'SimpleStrategy', 'replication_factor': 1};
> USE test_ks;
> CREATE TABLE IF NOT EXISTS test_cf (
> pid text,
> total int static,
> sid uuid,
> amount int,
> PRIMARY KEY ((pid), sid)
> ) WITH CLUSTERING ORDER BY (sid DESC);
> {code}
>
> - insert data
> {code:java}
> INSERT INTO test_cf (pid, sid, amount) VALUES ('1',
> b2495ad2-9b64-4aab-b000-2ed20dda60ab, 2);
> INSERT INTO test_cf (pid, total) VALUES ('1', 2);{code}
>
> - nodetool flush (this is necessary for the scenario to show the problem)
> - upgrade to C* 2.1.20/2.2.12
> - execute the following queries:
> {code:java}
> UPDATE test_cf SET total = 3 WHERE pid = '1' IF total = 2;
> UPDATE test_cf SET amount = 3 WHERE pid = '1' AND sid =
> b2495ad2-9b64-4aab-b000-2ed20dda60ab IF amount = 2;{code}
>
> Both statements won't be applied while they should be applied.
> It seems related to the min/maxColumn sstable checks (before the scrubbing,
> the min is an empty array, after it is no more) which filter too many
> sstables.
> The SliceQueryFilter.shouldInclude method filter too many SSTables.
> Note: When doing a simple "SELECT total FROM test_cf WHERE pid ='1';" works
> well because the selected slices are different (and thus do not filter the
> sstables).
> Note: This does not seem to affect the 3.0.X versions
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