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Backport: Prevent NPEs during DataNucleus L1 cache eviction - #7376
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Turns out the `evictObjects(Class<?>, boolean)` method is missing an internal `null` check, so it doesn't account for cache values getting GC'd and causes NPEs under memory pressure. `evictAllObjects` has a `null` check and doesn't suffer from the same issue. Signed-off-by: nscuro <nscuro@protonmail.com> (cherry picked from commit f16deb0) Signed-off-by: nscuro <nscuro@protonmail.com>
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Up to standards ✅🟢 Issues
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| Metric | Results |
|---|---|
| Complexity | 0 |
🟢 Coverage 100.00% diff coverage · 0.00% coverage variation
Metric Results Coverage variation ✅ 0.00% coverage variation (-1.00%) Diff coverage ✅ 100.00% diff coverage (70.00%) Coverage variation details
Coverable lines Covered lines Coverage Common ancestor commit (ee51852) 44424 38794 87.33% Head commit (944e780) 44424 (+0) 38792 (-2) 87.32% (0.00%) Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch:
<coverage of head commit> - <coverage of common ancestor commit>Diff coverage details
Coverable lines Covered lines Diff coverage Pull request (#7376) 2 2 100.00% Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified:
<covered lines added or modified>/<coverable lines added or modified> * 100%
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Description
Prevents NPEs during DataNucleus L1 cache eviction.
Addressed Issue
Fixes #7337
Backports #7357
Additional Details
N/A
Checklist
This PR implements an enhancement, and I have provided tests to verify that it works as intendedThis PR introduces changes to the database model, and I have updated the migration changelog accordinglyThis PR introduces new or alters existing behavior, and I have updated the documentation accordinglyThis PR is a substantial change (per the ADR criteria), and I have added an ADR underdocs/adr/