apache / apache/arrow-java

[Java] Compression closes uncompressed buffers

Open
#234 2 comments 0 reactions 0 assignees View on GitHub
Type: bug
Dominant language
Java
Stars
94
Forks
152
Avg merge
3d 16h
Merged PRs (30d)
11

Description

_AbstractCompressionCodec_ closes underlying _uncompressedBuffer_ which leads to closed buffers in _VectorSchemaRoot_ via {_}VectorUnloader{_}. There isn't such behavior in _NoCompressionCodec_ passing underlying buffers untouched.

**Reporter**: [Michal Zaborec](https://issues.apache.org/jira/browse/ARROW-18142)

**Note**: *This issue was originally created as [ARROW-18142](https://issues.apache.org/jira/browse/ARROW-18142). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*

Contributor guide

Open the contributing guide

Research direction

Start by reading AbstractCompressionCodec and compare its handling of uncompressedBuffer with NoCompressionCodec. Trace how VectorUnloader passes buffers into VectorSchemaRoot, then verify that compressed-codec use does not close the underlying buffers and that the corresponding behavior is covered by tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
32/100

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