[DRILL-8366] Late release of compressor memory in the Parquet writer

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.20.2
• Fix Version/s: 1.20.3
• Component/s: Storage - Parquet
• Assignee: James Turton
• Reporter: James Turton
• Created: 06/Dec/22 15:31
• Updated: 27/Dec/22 09:59
• Resolved: 27/Dec/22 09:59

Description

The Parquet writer waits until the end of the entire write before releasing its compression codec factory. The factory in turn releases compressors which release direct memory buffers used during compression. This deferred release leads a build up of direct memory use and can cause large write jobs to fail. The Parquet writer can instead release the abovementioned each time that a file/row group is flushed.