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Posted to commits@cassandra.apache.org by "Sylvain Lebresne (Updated) (JIRA)" <ji...@apache.org> on 2012/02/21 19:39:46 UTC
[jira] [Updated] (CASSANDRA-3821) Counters in super columns don't
preserve correct values after cluster restart
[ https://issues.apache.org/jira/browse/CASSANDRA-3821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sylvain Lebresne updated CASSANDRA-3821:
----------------------------------------
Fix Version/s: 1.1.0
Assignee: Sylvain Lebresne
> Counters in super columns don't preserve correct values after cluster restart
> -----------------------------------------------------------------------------
>
> Key: CASSANDRA-3821
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3821
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.0
> Environment: ubuntu, 'trunk' branch, used ccm to create a 3 node cluster with rf=3. A dtest was created to demonstrate.
> Reporter: Tyler Patterson
> Assignee: Sylvain Lebresne
> Fix For: 1.1.0
>
>
> Set up a 3-node cluster with rf=3. Create a counter super column family and increment a bunch of subcolumns 100 times each, with cf=QUORUM. Then wait a few second, restart the cluster, and read the values back. They almost all come back different (and higher) then they are supposed to be.
> Here are some extra things I've noticed:
> - Reading back the values before the restart always produces correct results.
> - Doing a nodetool flush before killing the cluster greatly improves the results, though sometimes a value will still be incorrect. You might have to run the test several times to see an incorrect value after a flush.
> - This problem doesn't happen on C* 1.0.7, unless you don't sleep between doing the increments and killing the cluster. Then it sometimes happens to a lesser degree.
> The dtest that demonstrates this issue is called "super_counter_test.py". Run it like this: nosetests --nocapture super_counter_test.py You'll need ccm from git@github.com:tpatterson/ccm.git.
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