leventov opened a new issue #8111: Fix concurrency of DerivativeDataSourceManager URL: https://github.com/apache/incubator-druid/issues/8111 - `derivativesRef` shouldn't be static - Seems that `derivativesRef` shouldn't be atomic; volatile would suffice. This looks like an example of https://github.com/code-review-checklists/java-concurrency#redundant-atomics - `derivativesRef` doesn't need to store a `ConcurrentHashMap`, a simple `HashMap` would suffice FYI @zhangxinyu1
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