[HBASE-17928] Shell tool to clear compaction queues

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Compaction, Operability

Release Note

Adds clear_compaction_queues to the hbase shell.
{code}
  Clear compaction queues on a regionserver.
  The queue_name contains short and long.
  short is shortCompactions's queue,long is longCompactions's queue.
  
  Examples:
  hbase> clear_compaction_queues 'host187.example.com,60020'
  hbase> clear_compaction_queues 'host187.example.com,60020','long'
  hbase> clear_compaction_queues 'host187.example.com,60020', ['long','short']
{code}

• Assignee: Guangxu Cheng Assign to me
• Reporter: Guangxu Cheng
• Created: 17/Apr/17 03:35
• Updated: 29/Jun/17 22:22
• Resolved: 29/Jun/17 22:22

Description

scenario：
1. Compact a table by mistake
2. Compact is not completed within the specified time period

In this case, clearing the queue is a better choice, so as not to affect the stability of the cluster