[KYLIN-1992] Clear ThreadLocal Contexts when query failed before scaning HBase

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: v1.5.4
• Assignee: Kaisen Kang
• Reporter: Kaisen Kang
• Created: 01/Sep/16 09:16
• Updated: 15/Sep/16 03:35
• Resolved: 04/Sep/16 13:17

Description

currently, we call `OLAPContext.clearThreadLocalContexts()` function before scaning HBase.
if query failed before scaning HBase, we would get wrong `realization` of the query in the log possibly.
Because the thread pool of Tomcat multiplexed the thread and didn't clear ThreadLocal variable.