[VL] Flaky test on CSV on Spark-4.1
- Dominant language
- Scala
- Stars
- 1.6k
- Forks
- 657
- Avg merge
- 2d 14h
- Merged PRs (30d)
- 80
Description
### Backend
VL (Velox)
### Bug description
https://github.com/apache/gluten/actions/runs/23478921533/job/68373808924?pr=11802
```
corrupted ZSTD compressed csv respects ignoreCorruptFiles *** FAILED ***
2026-03-24T14:57:01.5354862Z null did not equal "FAILED_READ_FILE.NO_HINT" (SparkFunSuite.scala:359)
2026-03-24T14:57:01.5695665Z 14:57:01.568 WARN org.apache.spark.sql.execution.datasources.csv.GlutenCSVv1Suite:
```
```
2026-03-24T14:57:44.6465291Z - corrupted ZSTD compressed csv respects ignoreCorruptFiles *** FAILED ***
2026-03-24T14:57:44.6466213Z null did not equal "FAILED_READ_FILE.NO_HINT" (SparkFunSuite.scala:359)
2026-03-24T14:57:44.6728926Z 14:57:44.672 WARN org.apache.spark.sql.execution.datasources.csv.GlutenCSVLegacyTimeParserSuite:
```
### Gluten version
_No response_
### Spark version
None
### Spark configurations
_No response_
### System information
_No response_
### Relevant logs
```bash
```
Contributor guide
Research direction
Start with the failing cases named in GlutenCSVv1Suite and GlutenCSVLegacyTimeParserSuite, using the linked GitHub Actions run and the assertion location in SparkFunSuite.scala:359. Reproduce the corrupted ZSTD CSV failure and determine why the expected "FAILED_READ_FILE.NO_HINT" value is sometimes null; done means the affected test cases pass consistently.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- scala
- Domain
- backend, testing-qa
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 38/100