[KYLIN-4621] Avoid annoying log message when build cube and query

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: v4.0.0-alpha
• Fix Version/s: v4.0.0-alpha
• Component/s: Spark Engine
• Sprint: Sprint 53
• Assignee: Wang Rupeng
• Reporter: Wang Rupeng
• Created: 07/Jul/20 02:55
• Updated: 13/Sep/20 12:22
• Resolved: 03/Sep/20 07:05

Description

1. Build
   There will be about 40 thousands rows log messages of one build task, most of them are unnecessary.
2. Query
   The first time of query, kylin will init one spark context and print all jars and classes loaded. This can be print in kylin.out not kylin.log.