[HIVE-9258] Explain query should share the same Spark application with regular queries [Spark Branch]

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Component/s: Spark
• Assignee: Jimmy Xiang
• Reporter: Xuefu Zhang
• Created: 06/Jan/15 02:42
• Updated: 13/Jan/15 03:03
• Resolved: 13/Jan/15 02:44

Description

Currently for Hive on Spark, query plan includes the number of reducers, which is determined partly by the Spark cluster. Thus, explain query will need to launch a Spark application (Spark remote context), which should be shared with regular queries so that we don't launch additional Spark remote context.