[HELIX-200] helix controller send ERROR->DROPPED transition infinitely

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0-incubating
• Assignee: Zhen Zhang
• Reporter: Zhen Zhang
• Created: 08/Aug/13 23:21
• Updated: 13/Nov/13 19:01
• Resolved: 13/Nov/13 19:01

Description

when a resource in ERROR state is dropped, helix controller is sending ERROR->DROPPED transition. this causes problems when the participant is in old version where it doesn't implement a default ERROR->DROPPED transition in state model. In this case, participant will go into ERROR state again when receiving an ERROR->DROPPED transition and controller will send ERROR->DROPPED transitions infinitely. This leads too much traffic against zookeeper and may potentially bring down zookeeper

the short term solution is let controller disable ERROR->DROPPED transition for participant with old version.