[IOTDB-2062] UDF Framework: Potential Memory Leak in SingleInputColumnSingleReferenceIntermediateLayer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: master branch
• Component/s: Core/Query
• Labels: pull-request-available
• Sprint: 2021-11-Su
• Assignee: Steve Yurong Su
• Reporter: Steve Yurong Su
• Created: 26/Nov/21 02:42
• Updated: 26/Nov/21 05:03
• Resolved: 26/Nov/21 05:03

Description

The variable tvList in SingleInputColumnSingleReferenceIntermediateLayer#constructRowSlidingSizeWindowReader() and SingleInputColumnSingleReferenceIntermediateLayer#constructRowSlidingTimeWindowReader() will materialize all iteration data until the end of the query, which may trigger useless memory control actions (resulting in meaningless file IO).

It's obviously a bug and results in low query throughput when query data is large.

Issue Links

• links to: GitHub Pull Request #4472