[CASSANDRA-7836] Data loss after moving tokens

• Type: Bug
• Status: Resolved
• Priority: Urgent
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Labels: qa-resolved

Environment

OSX and Ubuntu 14.04

• Severity: Critical
• Assignee: Tom Hobbs
• Reporter: Philip Thompson

Authors

Tom Hobbs

Reviewers

Yuki Morishita

• Tester: Philip Thompson
• Created: 26/Aug/14 17:32
• Updated: 16/Apr/19 09:31
• Resolved: 27/Aug/14 16:04

Description

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.

Issue Links

• relates to: CASSANDRA-3668 Parallel streaming for sstableloader