[BOOKKEEPER-505] FIFODeliveryManager runs at single thread.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: hedwig-server
• Assignee: Sijie Guo
• Reporter: Sijie Guo
• Created: 14/Dec/12 08:42
• Updated: 07/Oct/14 09:49
• Resolved: 17/Mar/13 23:53

Description

A lots of things needs to run in FIFODeliveryManager, #startServingSubscription, #stopServingSubscriber, resuming throttled subscriber and delivering first message for each started subscriber. It would increment latency for delivering message or sending response for stopServingSubscriber (response for closeSubscription, or subscription event when force attach or topic release).

It is similar as what readahead cache happened before.

Issue Links

• relates to: BOOKKEEPER-461 Delivery throughput degrades when there are lots of publishers w/ high traffic.
• relates to: BOOKKEEPER-526 multiple threads for delivery manager