[STORM-1604] Delayed transition should handle NotALeaderException

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.0.0
• Component/s: storm-core
• Epic Link: Release Apache Storm 1.0.0
• Assignee: Parth Brahmbhatt
• Reporter: Parth Brahmbhatt
• Created: 05/Mar/16 00:08
• Updated: 22/Mar/16 20:08
• Resolved: 22/Mar/16 20:08

Description

Currently if an action(kill, rebalance) is scheduled with delay, nimbus stores the state in zookeeper and then schedules a delayed event to do final transition. If during this wait time, leader nimbus loses the leadership, when the delayed operation is executed it receives a NotALeaderException which it does not handle causing the nimbus to die. We should catch the exception and ignore it.