[IMPALA-4410] PlanFragmentExecutor::Close() may crash if Prepare() fails

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.8.0
• Component/s: Backend
• Labels: found-by-debug-rules
• Target Version: Impala 2.8.0
• Assignee: Henry Robinson
• Reporter: Henry Robinson
• Created: 31/Oct/16 21:55
• Updated: 23/Nov/16 23:25
• Resolved: 23/Nov/16 23:25

Description

PlanFragmentExecutor::Close() calls desc_tbl()->ClosePartitionExprs(). If Prepare() fails, desc_tbl() (which points to the RuntimeState member) may be nullptr.

Easy fix is to only call that method if desc_tbl() is not nullptr.