[DRILL-3190] Invalid FragmentState transition from CANCELLATION_REQUESTED in QueryManager

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Component/s: Execution - Flow
• Assignee: Sudheesh Katkam
• Reporter: Sudheesh Katkam
• Created: 26/May/15 22:00
• Updated: 14/Jul/15 23:45
• Resolved: 08/Jun/15 19:11

Description

If a fragment is cancelled as soon as it starts running, there are two state change messages that are reported to the QueryManager: transition to RUNNING and transition to CANCELLATION_REQUESTED.

The order of receiving these messages is not guaranteed because the messages can be reported from different threads. The QueryManager#FragmentStateListener does not check for a transition from CANCELLATION_REQUESTED to RUNNING. This state change should not happen in FragmentData#setStatus.