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 Environment: ubuntu, 'trunk' branch, used ccm to create a 3 node cluster with rf=3. A dtest was created to demonstrate. Reporter: Tyler Patterson 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 g...@github.com:tpatterson/ccm.git. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira