[CASSANDRA-1292] Multiple migrations might run at once

• Type: Bug
• Status: Resolved
• Priority: Urgent
• Resolution: Fixed
• Fix Version/s: 0.7 beta 1
• Severity: Critical
• Assignee: Gary Dusbabek
• Reporter: Stu Hood

Authors

Gary Dusbabek

• Created: 16/Jul/10 21:58
• Updated: 16/Apr/19 09:33
• Resolved: 28/Jul/10 18:02

Description

The service.MigrationManager class manages a MIGRATION_STAGE where nodes should execute db.migration.Migration instances.

The problem is that the node that a client connects to via Thrift or Avro initiates the migration in their client thread (calls migration.apply). Instead, the Thrift and Avro clients should ensure that the migration occurs in MIGRATION_STAGE, and should block until the migration is applied by the stage.