[KYLIN-1061] "kylin.sh start" should check whether kylin has already been running

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: v0.7.1, v0.7.2, v1.0
• Fix Version/s: v1.1, v1.4.0
• Component/s: Environment
• Assignee: Shao Feng Shi
• Reporter: Shao Feng Shi
• Created: 08/Oct/15 02:04
• Updated: 26/Oct/15 03:25
• Resolved: 08/Oct/15 08:42

Description

Today as "kylin.sh start" doesn't check whether the kylin has already been running, if user wrongly start again, it will start a new process and overwrite the pid file with wrong pid.

The correct behavior should be checking whether the pid process exists before start;