Troubleshoot `testMetadataColumnStatsIndexPartialProjection` flakiness
- Dominant language
- Java
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Description
Test is periodically failing in CI, trying it repro locally was able to make it fail only once (w/ valueCount flip-flopping b/w 3 and 4 for a single file) out of a dozen runs.
Examples of failing runs:
[https://dev.azure.com/apache-hudi-ci-org/apache-hudi-ci/_build/results?buildId=13428&view=logs&j=3272dbb2-0925-5f35-bae7-04e75ae62175&t=fb428e45-27ff-524a-7e12-db1cb49c418a&s=ee3800fd-6e81-525f-e564-94108585217d]
## JIRA info
- Link: https://issues.apache.org/jira/browse/HUDI-5354
- Type: Bug
- Epic: https://issues.apache.org/jira/browse/HUDI-4302
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Research direction
Start with the test named testMetadataColumnStatsIndexPartialProjection and compare its local behavior with the linked Azure CI failure logs. Reproduce the failure across repeated runs, focusing on the reported valueCount change from 3 to 4 for one file. Done means the flakiness is explained and the test or underlying behavior is made reliable.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- testing
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100