[jira] [Created] (CASSANDRA-7836) Data loss after moving tokens

["Philip Thompson (JIRA)" <ji...@apache.org>]

Philip Thompson created CASSANDRA-7836:
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             Summary: Data loss after moving tokens
                 Key: CASSANDRA-7836
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7836
             Project: Cassandra
          Issue Type: Bug
          Components: Core
         Environment: OSX and Ubuntu 14.04
            Reporter: Philip Thompson
             Fix For: 2.1.1
         Attachments: topology_test.py

The dtest topology_test:TestTopology.movement_test is failing on 2.1.0 and 2.1-HEAD. The test, which has been attached, goes through the following workflow:
- Create an unbalanced three node cluster without vnodes
- Create a keyspace with RF=1
- Load data into the cluster
- Flush the cluster with nodetool flush
- Move the tokens around to balance the cluster, using nodetool move
- Run nodetool cleanup

At this point, the test checks that all 10,000 of the originally inserted rows are still there. In 2.0.10 that is true, however in 2.1, only ~4000 rows exist.



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