[AMQ-3141] Messages may be lost when schedule them with a short delay

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.4.2
• Fix Version/s: 5.5.0
• Patch Info: Patch Available
• Assignee: Timothy A. Bish
• Reporter: Swen Fuhrmann
• Created: 16/Jan/11 22:03
• Updated: 04/Sep/13 20:51
• Resolved: 09/Feb/11 16:05

Description

The message scheduler has an optimization, that the schedule time will be aligned to seconds. All messages which included in the same second will be maintained in one store entry with a list of jobs.
The list will be read from the store during the main loop, the entries will be executed and the list will be deleted from the store. When new messages are added on the same list during the scheduling, these messages could be lost.
One possible fix could be, that the main loop reads and removes the lists in one atomic step due to a synchronization.

Issue Links

• depends upon: AMQ-3140 Lost messages when scheduling messages concurrently
• is related to: AMQ-4073 Cannot shut down broker under certain conditions with schedule delivery and producer flow control