[STORM-1574] Better exception handling in backpressure thread, and remove backpressure dir during topology kill.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0, 2.0.0
• Fix Version/s: 1.0.0, 2.0.0
• Component/s: storm-core
• Epic Link: Release Apache Storm 1.0.0
• Assignee: Zhuo Liu
• Reporter: Zhuo Liu
• Created: 24/Feb/16 22:32
• Updated: 02/Mar/16 16:50
• Resolved: 01/Mar/16 19:19

Description

The current exception handling in WorkerBackpressureThread can cause the thread to die before we want, causing potential backpressure flag synchronizing problem.
Also, we need to cleanup the topology backpressure directory during killing.