[DRILL-1839] Clean up complex writers per batch if project has a ComplexWriter function evaluation or leak memory

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Assignee: Hanifi Gunes
• Reporter: Hanifi Gunes
• Created: 11/Dec/14 05:09
• Updated: 14/Dec/14 06:39
• Resolved: 14/Dec/14 06:39

Description

ProjectRecordBatch maintains a list of complex writers that is used for allocation before function evaluation. To avoid re-allocation & leaking memory, we need to clean up writers from previous batches before function invocation takes place.