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Posted to reviews@iotdb.apache.org by "shuwenwei (via GitHub)" <gi...@apache.org> on 2026/05/18 03:09:40 UTC
[PR] Fix query TVList snapshot race during working memtable reads [iotdb]
shuwenwei opened a new pull request, #17699:
URL: https://github.com/apache/iotdb/pull/17699
## Summary
- Capture the sorted state and row count under the TVList monitor when preparing a working memtable TVList for query.
- Keep the query-visible row count consistent with the sorted snapshot so later query sorting does not mutate indices beyond an older iterator snapshot.
## Root Cause
The query context lock only protects query ownership metadata, not TVList row count, sorted state, writes, or sort operations. A query could share a currently sorted mutable working TVList while recording a row count from a different moment, allowing a later query sort to reorder indices used by an older iterator.
## Validation
Not run, per local workflow instruction.
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Re: [PR] Fix query TVList snapshot race during working memtable reads [iotdb]
Posted by "sonarqubecloud[bot] (via GitHub)" <gi...@apache.org>.
sonarqubecloud[bot] commented on PR #17699:
URL: https://github.com/apache/iotdb/pull/17699#issuecomment-4473919449
## [](https://sonarcloud.io/dashboard?id=apache_iotdb&pullRequest=17699) **Quality Gate passed**
Issues
 [2 New issues](https://sonarcloud.io/project/issues?id=apache_iotdb&pullRequest=17699&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)
 [0 Accepted issues](https://sonarcloud.io/project/issues?id=apache_iotdb&pullRequest=17699&issueStatuses=ACCEPTED)
Measures
 [0 Security Hotspots](https://sonarcloud.io/project/security_hotspots?id=apache_iotdb&pullRequest=17699&issueStatuses=OPEN,CONFIRMED&sinceLeakPeriod=true)
 [0.0% Coverage on New Code](https://sonarcloud.io/component_measures?id=apache_iotdb&pullRequest=17699&metric=new_coverage&view=list)
 [0.0% Duplication on New Code](https://sonarcloud.io/component_measures?id=apache_iotdb&pullRequest=17699&metric=new_duplicated_lines_density&view=list)
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[See analysis details on SonarQube Cloud](https://sonarcloud.io/dashboard?id=apache_iotdb&pullRequest=17699)
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Re: [PR] Fix query TVList snapshot race during working memtable reads [iotdb]
Posted by "shuwenwei (via GitHub)" <gi...@apache.org>.
shuwenwei closed pull request #17699: Fix query TVList snapshot race during working memtable reads
URL: https://github.com/apache/iotdb/pull/17699
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